link full download test bank for statistics for business and economics student value edition 12th edition by mcclave

Write the word or phrase that best completes each statement or answers the question.. Write the word or phrase that best completes each statement or answers the question.. Write the word

Test Bank for Statistics for Business and Economics

Student Value Edition 12th Edition by McClave

MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the

question

1) In an eye color study, 25 out of 50 people in the sample had brown eyes In this situation, what 1)

A) a class relative frequency B) a class

2) What class percentage corresponds to a class relative frequency of 37? 2)

A) 63% B) 63% C) 37% D) 37%

SHORT ANSWER Write the word or phrase that best completes each statement or answers the question

3) A sample of 100 e-mail users were asked whether their primary e-mail account was a free 3) account,

an institutional (school or work) account, or an account that they pay for

personally Identify the classes for the resulting data

Answer: free account, institutional account, account paid for personally

MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the

2

SHORT ANSWER Write the word or phrase that best completes each statement or answers the question

6) Complete the frequency table for the data shown below 6)

green blue brown orange blue brown orange blue red

green blue brown green red brown blue brown blue blue

7) A frequency table displays the proportion of observations falling into each class 7)

A) True B) False

Solve the problem

8) 260 randomly sampled college students were asked, among other things, to state their year in school (freshman, sophomore, junior, or senior) The responses are shown in the bar graph below

How many of the students who responded would be classified as upperclassmen (e.g., juniors or seniors)?

4

The manager of a store conducted a customer survey to determine why customers shopped at

the store The results are shown in the figure What proportion of customers responded that

merchandise was the reason they shopped at the store?

The bar graph shows the political affiliation of 1000 registered U.S voters What percentage of

the voters belonged to one of the traditional two parties (Democratic or Republican)?

Answer: C

gold gold silver gold bronze silver silver bronze gold silver silver bronze

silver gold

gold silver silver bronze bronze gold silver

a Construct a frequency table for the data

b Construct a relative frequency table for the data

c Construct a frequency bar graph for the data

in a bar graph can be arranged

by height

in ascendin

g order from left

to right 12)

l bars can

be used when constructing a bar graph 13)

Solve the problem

The pie chart shows the classifications of students in a statistics class

What percentage of the class consists of freshman, sophomores, and juniors?

the questions posed to

a sample

of 286 incoming freshmen

at a large public university was, 15)

"Do you have any tattoos?" Their responses are shown below in the pie chart Please note that the values shown represent the number of responses in each category

SHORT ANSWER Write the word or phrase that best completes each statement or answers the question

shows the number

of each type of book found at

an online auction site during a 16)

a Construct a relative frequency table for the book data

b Construct a pie chart for the book data

your statistics class is sophomores, then

in a pie chart representing classifications of the 17) students in your statistics class the slice assigned to sophomores is 90°

10

of a pie chart must be arranged from largest to smallest

in a clockwis

e direction

of each type of car sold

in June

20)

a Construct a relative frequency table for the car sales

b Construct a Pareto diagram for the car sales using the class percentages as the heights of the bars

es or class percentages, when 21) constructing a Pareto diagram

in a 22) counterclockwise direction

s

containe

d the question

"Did your store 23)

suffer any losses due to employee theft?" The responses are summarized in the table for two

years Compare the responses for the two years using side-by-side bar charts What

inferences can be made from the charts?

an

Employee

Percentage Percentage Theft in year 1 in year 2

14

are shown below using a 24) graphical technique from chapter 2 of the text How many of the hockey team payrolls

exceeded $20 million (Note: Assume that no payroll was exactly $20 million)?

of medals (gold, silver, and bronze) won by each country 25)

winning at least one gold medal in the Winter Olympics

1-5 6-10 11-15 16-20 21-25 26-30

b Using the classes from the frequency table, construct a histogram for the data

a basketball team for each game during its last season have been 26) summariz

ed in the table below

Score Frequency

b Construct a histogram for the scores

Answer: a The exact scores would be needed to construct a stem-and-leaf display but the exact

scores are not available in the table given

11

28) A histogram can be constructed using either class frequencies or class relative frequencies as the 28)

30) A survey was conducted to determine how people feel about the quality of programming available 30)

on television Respondents were asked to rate the overall quality from 0 (no quality at all) to 100

18

What percentage of the respondents rated overall television quality

of the students who responded had GPA's that exceeded 3.55?

Leaf Digit Unit = 0.01 Minimum 1.9900

A) 31 B) 19 C) 39 D) 49

Answer: C

SHORT ANSWER Write the word or phrase that best completes each statement or answers the question

33)For large data sets, a stem-and-leaf display is a better choice than a histogram 33)

20

34 A dot plot of the speeds of a sample of 50 cars passing a policeman with a radar gun is shown 34)

What proportion

of the motorists were driving above the posted speed limit of 55 miles per hour?

A) 0.64 B) 7 C) 0.50 D) 0.14

35 Which of the graphical techniques below can be used to summarize qualitative data? 35)

A) stem-and-leaf plot B) dot plot

36) Parking at a university has become a problem University administrators are interested in 36)

determining the average time it takes a student to find a parking spot An administrator

inconspicuously followed 90 students and recorded how long it took each of them to find a parking spot Which of the following types of graphs should not be used to display information concerning the students parking times?

A) histogram B) stem-and-leaf display

C) pie chart D) box plot

37) Fill in the blank One advantage of the is that the actual data values are retained in the

37)

A) pie chart B) stem-and-leaf plot C) histogram

38) The amount spent on textbooks for the fall term was recorded for a sample of five university 38) students - $400, $350, $600, $525, and $450 Calculate the value of the sample mean for the data A) $465 B) $450 C) $400 D) $600

39) The amount spent on textbooks for the fall term was recorded for a sample of five university 39) students - $400, $350, $600, $525, and $450 Calculate the value of the sample median for the data A) $600 B) $465 C) $400 D) $450

Answer: D

40) A sociologist recently conducted a survey of senior citizens who have net worths too high to qualify

40) for Medicaid but have no private health insurance The ages of the 25 uninsured senior citizens were

42) A shoe retailer keeps track of all types of information about sales of newly released shoe styles One 42)

newly released style was marketed to tall people Listed below are the shoe sizes of 12 randomly selected

customers who purchased the new style Find the mode of the shoe sizes

SHORT ANSWER Write the word or phrase that best completes each statement or answers the question

43) Each year advertisers spend billions of dollars purchasing commercial time on network 43)

television In the first 6 months of one year, advertisers spent $1.1 billion Who were the

largest spenders? In a recent article, the top 10 leading spenders and how much each spent

(in million of dollars) were listed:

Calculate the mean and median for the data

Answer: The mean of the data is x = x

71 + 63.7 + 54.5 + 54.1 + 28.5 + 25.9 + 24.6 + 23.1 + 23.6 + 19.8

= 388.810

= 38.88 $38.88 million

The median is the average of the middle two observations

44) The data show the total number of medals (gold, silver, and bronze) won by each country 44) winning at

least one gold medal in the Winter Olympics Find the mean, median, and mode of the numbers of

medals won by these countries

45) Calculate the mean of a sample for which x = 196 and n = 8 45)

Answer: The mean is divided by n:

x = 196 = 24.5 n 8 46) The calculator screens summarize a data set 46)

a How many data items are in the set?

b What is the sum of the data?

c Identify the mean, median, and mode, if possible

Answer: a n = 21

b x = 1679

c mean: x 79.95; median: Med=82; mode: not possible

MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question

47) At the U.S Open Tennis Championship a statistician keeps track of every serve that a player hits 47)

during the tournament The statistician reported that the mean serve speed of a particular player was

96 miles per hour Suppose that the statistician indicated that the serve speed distribution was skewed

to the left Which of the following values is most likely the value of the median serve speed?

was calculated to be $425 Which of the following interpretations of the mean is correct?

B) 50% of the students sampled had textbook costs equal to $500 C) The most frequently occurring textbook cost in the sample was $500 D) 50% of the students sampled had textbook costs that were less than $500

49) The amount spent on textbooks for the fall term was recorded for a sample of five hundred 49) university students The mean expenditure was calculated to be $500 and the median expenditure was calculated to be $425 Which of the following interpretations of the median is correct?

A) 50% of the students sampled had textbook costs that were less than $425 B) The most frequently occurring textbook cost in the sample was $425 C) The average of the textbook costs sampled was $425

D) 50% of the students sampled had textbook costs equal to $425 Answer: A

urin

g o

ne re

nt year, U

S consumer

s redeeme

d 6

52 billio

n manufacturers' coupo

ns an

d save

B) Half of all coupons were worth more than $0.33 in savings C) Half of all coupons were worth more than 301.9 cents in savings

D) The average savings was $0.33 per coupon

Answer: D

he outp

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w displa

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e mea

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an

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an fo

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e stat

e hig

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ut rate

s

in ye

ar

1

51) and in year 5

MEAN 28.94 26.53 MEDIAN 27.78 25.64

Interpret the year 5 median dropout rate of 25.64

A) Half of the 51 states had a dropout rate below 25.64%

B) Half of the 51 states had a dropout rate of 25.64%

C) The most frequently observed dropout rate of the 51 states was 25.64%

D) Most of the 51 states had a dropout rate close to 25.64%

Answer: A

18

)

C) A = median, B = mode, C = mean D) A = mode, B = mean, C = median

a distributio

n th

at

is skewe

d

to th

e right, wha

t

is th

e relationshi

p

of th

e mea

n,

median, an

d

53) mode?

A) mean > median > mode B) mode > mean > median

C) median > mean > mode D) mode > median > mode

Answer: A

an

y firm

s us

e on-the-jo

b trainin

g

to teac

h thei

r

er programmin

g Suppos

e

54) you work in the personnel department of a firm that just finished training a group of its

employees to program, and you have been requested to review the performance of one of the trainees on the final test that was given to all trainees The mean of the test scores is 70

Additional information indicated that the median of the test scores was 80 What type of distribution most likely describes the shape of the test scores?

A) skewed to the right B) unable to determine with the information given C) symmetric

D) skewed to the left Answer: D

sh

oe compan

y repor

ts th

e mod

e fo

r th

e sh

oe size

s

of men's shoe

s

is 12 Interpre

t th

is resu

lt

55) A) Half of all men's shoe sizes are size 12

B) The most frequently occurring shoe size for men is size 12

C) Half of the shoes sold to men are larger than a size 12 D) Most men have shoe sizes between 11 and 13

e followin

re

of centra

l tendency

?

56)

he distributio

n

of salari

es

of professiona

l basketba

ll player

s

is skewe

d

to th

e

re 57) of central tendency would be the best measure to determine the location of the center of the

g

at

a universit

y ha

s becom

e

a problem Universit

y a

dministrato

rs ar

e intereste

d

in

58)

determining the average time it takes a student to find a parking spot An administrator

inconspicuously followed 190 students and recorded how long it took each of them to find

a parking spot The times had a distribution that was skewed to the left Based on this

information, discuss the relationship between the mean and the median for the 190 times

collected

Answer: Since the distribution is skewed to the left, we know that the median time will exceed

the mean time

he outp

ut belo

w displa

d medi

an fo

r th

e stat

e hig

h scho

ol dropo

ut rate

s

in

59)

year 1 and in year 5

Answer: In both year 1 and year 5, the mean dropout rates exceed the median dropout

rates This indicates that both the year 1 and year 5 high school dropout rates have distributions that are skewed to the right

he total point

s scor

ed

by

a basketba

ll tea

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r ea

ch gam

e durin

g its la

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on

or screen

s summariz

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a da

ta se

t

61)

a Identify the mean and the median

b Based only on the mean and the median, do you expect that the data set is skewed to the right, symmetric, or skewed to the left? Explain

Answer: a mean: x 73.65; median: Med=81

b We expect the data to be skewed to the left because the mean is less than the median

n an

d th

e medi

an ar

e usef

ul mea

l tenden

cy fo

r bot

h qualitati

ve an

d

62) quantitative data A) True B) False

a symmetri

c an

d moun

d shape

d distributio

n, w

e expe

ct th

e valu

es

of th

e mea

n, median, an

d

63)

c distributions, th

e mea

n an

d th

e medi

an will

be approximatel

y equ

al

64)

skewe

d distributions, th

e mea

n

is th

e be

st measu

re

of th

e cent

n sinc

e

it

is

65)

68) Each year advertisers spend billions of dollars purchasing commercial time on network television 68)

1

SHORT ANSWER Write the word or phrase that best completes each statement or answers the question

73) The ages of five randomly chosen professors are 58, 61, 62, 69, and 44 Calculate the sample 73)

variance of these ages

74) The data show the total number of medals (gold, silver, and bronze) won by each country 74)

winning at least one gold medal in the Winter Olympics Find the range, sample variance, and

sample standard deviation of the numbers of medals won by these countries

1 2 3 3 4 9 9 11 11

11 14 14 19 22 23 24 25 29

Answer: The range is 29 - 1 = 28 medals.