Introduction to the Practice of Statistics 9th edition by David S. Moore Test bank
Which of the following description(s) is/are correct regarding the shape of the histogram?
A)Skewed right
B)Skewed left
C)Symmetric
D)An outlier is present.
E)Unimodal
F)Bimodal
55.In a statistics class with 136 students, the professor records how much money each student has in their possession during the first class of the semester. The histogram shown below represents the data he collected.
What is approximately the number of students with $30 or more in their possession?
A)Less than 5
B)About 10
C)About 30
D)More than 100
56.The histogram below represents the height (in inches) of the gold medal–winning high jumps for the Olympic Games up to Sydney 2000.
What is approximately the mean height?
A)75 inches
B)77.5 inches
C)82 inches
D)90 inches
57.The histogram below represents the height (in inches) of the gold medal–winning high jumps for the Olympic Games up to Sydney 2000.
What is approximately the percentage of these winning jumps that were at least 7 feet and1 inch high (85 inches)?
A)9%
B)14%
C)23%
D)35%
58.A consumer agency is testing appliances for a series of articles in their magazine. Currently they are working with cooktops and ranges. They have selected 16 of the most commonly used models. Using a series of tests, the agency will estimate the lifetime of these models. A histogram of these (estimated) lifetimes is shown below.
What is the proportion of these appliances that is estimated to last longer than 15 years?
A)More than half
B)Less than half
C)Equal to 4/16 = 0.25
D)It cannot be determined from this graph.
59.A consumer agency is testing appliances for a series of articles in their magazine. Currently they are working with cooktops and ranges. They have selected 16 of the most commonly used models. Using a series of tests, the agency will estimate the lifetime of these models. A histogram of these (estimated) lifetimes is shown below.
Select all correct descriptions for the shape of the histogram of the estimated lifetimes of these 16 appliances.
A)Symmetric
B)Unimodal
C)Skewed right
D)Skewed left
60.During the early part of the 1994 baseball season, many sports fans and baseball players noticed that the number of home runs being hit seemed to be unusually large. Below are separate stemplots for the number of home runs by American League and National League teams based on the team-by-team statistics on home runs hit through Friday, June 3, 1994 (from the Columbus Dispatch, Sunday, June 5, 1994).
Legend: 2|9 represents 29.
What is the median for the number of home runs for the American League teams?
A)45
B)50
C)50.5
D)57.5
61.During the early part of the 1994 baseball season, many sports fans and baseball players noticed that the number of home runs being hit seemed to be unusually large. Below are separate stemplots for the number of home runs by American League and National League teams based on the team-by-team statistics on home runs hit through Friday, June 3, 1994 (from the Columbus Dispatch, Sunday, June 5, 1994).
Legend: 2|9 represents 29.
Determine whether each of the following statements is true or false.
A) The American League plot is reasonably symmetric.
B) The National League plot is bimodal.
C) The median number of home runs hit by National League teams for this time period was higher than the median for the American League teams.
D) The lowest number of home runs hit by any team for this time period is 29.
62.During the early part of the 1994 baseball season, many sports fans and baseball players noticed that the number of home runs being hit seemed to be unusually large. Below are separate stemplots for the number of home runs by American League and National League teams based on the team-by-team statistics on home runs hit through Friday, June 3, 1994 (from the Columbus Dispatch, Sunday, June 5, 1994).
Legend: 2|9 represents 29.
What is the mean for the number of home runs for the National League teams?
A)45
B)50