STATISTICS Final Exam Questions With Accurate Solutions.
A confidence interval for a parameter is - accurate answers-An interval of
numbers combined with the likelihood the interval contains the unknown
parameter.
Suppose a 90% confidence interval for μ turns out to be (150, 250). Based on
the interval, do you believe the average is equal to 260? - accurate answers-
No, and I am 90% sure of it
In a sample of 10 randomly selected employees, it was found that their mean
height was 63.4 inches. From previous studies, it is assumed that the standard
deviation, σ, is 2.4. Compute the 95% confidence interval for μ. - accurate
answers-(61.9, 64.9)
Construct a 90% confidence interval for the population mean, μ. Assume the
population has a normal distribution. A sample of 15 randomly selected math
majors has a grade point average of 2.86 with a standard deviation of 0.78. -
accurate answers-(2.51, 3.21)
A point estimate is the value of a ______________ that estimates the value of a
_______________. - accurate answers-statistic; parameter
When 465 junior college students were surveyed,135 said that they have
previously owned a motorcycle. Find a point estimate for p, the population
proportion of students who have previously owned a motorcycle. - accurate
answers-0.290
TRUE OR FALSE
If r2 = 0.75, that means that 75% of the change in the y variable is due to the
linear relationship between the x and y variables. - accurate answers-TRUE
Describe the relationship between a student's grade in class and the number
of absences in that class. - accurate answers-negative relationship
TRUE OR FALSE
The graph of a correlation is a scatter plot. - accurate answers-True
The ages of the 35 members of a track and field team are listed below.
Construct a box plot for the data set.
, 15 16 18 18 18 19 20
20 20 21 21 22 22 23
23 24 24 24 25 25 26
27 27 28 29 29 30 31
31 33 34 35 39 42 48 - accurate answers-15,20, 24, 30, 48 (picture)
Bill kept track of the number of hours he spent exercising each week. The
results for four months are shown below. Find the mean number of hours Bill
spent exercising per week. Round your answer to two decimal places.
8.40 6.50 8.10 7.70 8.60 8.40
6.70 8.10 6.60 8.40 7.70 6.90
7.80 6.50 6.50 7.60 8.60 6.70 - accurate answers-7.54
The weights (in ounces) of 21 cookies are shown. Find the median weight.
0.73 1.35 0.68 1.62 0.87 0.78 1.32
1.35 1.53 0.92 0.73 1.35 1.09 0.85
0.47 1.35 0.78 1.09 1.72 0.87 0.56 - accurate answers-0.92
The weights (in ounces) of 14 different apples are shown below. Find the
mode(s) of the data.
5.5 4.6 4.5 5.3 4.0 5.5 4.6
6.1 5.6 5.3 5.5 6.1 5.3 5.8 - accurate answers-5.5, 5.3
Use the given sample data to find Q3.
49 52 52 52 74 67 55 55 - accurate answers-61.0
Jeanne is currently taking college economics. The instructor often gives
quizzes. On the past five quizzes, Jeanne got the following scores:
5 19 2 13 9
Compute the range. - accurate answers-17
Find the variance for the given data. Round your answer to one more decimal
place than the original data.
7.9, 3.1, 2.9, 1.4, and 7.1 - accurate answers-8.11
A confidence interval for a parameter is - accurate answers-An interval of
numbers combined with the likelihood the interval contains the unknown
parameter.
Suppose a 90% confidence interval for μ turns out to be (150, 250). Based on
the interval, do you believe the average is equal to 260? - accurate answers-
No, and I am 90% sure of it
In a sample of 10 randomly selected employees, it was found that their mean
height was 63.4 inches. From previous studies, it is assumed that the standard
deviation, σ, is 2.4. Compute the 95% confidence interval for μ. - accurate
answers-(61.9, 64.9)
Construct a 90% confidence interval for the population mean, μ. Assume the
population has a normal distribution. A sample of 15 randomly selected math
majors has a grade point average of 2.86 with a standard deviation of 0.78. -
accurate answers-(2.51, 3.21)
A point estimate is the value of a ______________ that estimates the value of a
_______________. - accurate answers-statistic; parameter
When 465 junior college students were surveyed,135 said that they have
previously owned a motorcycle. Find a point estimate for p, the population
proportion of students who have previously owned a motorcycle. - accurate
answers-0.290
TRUE OR FALSE
If r2 = 0.75, that means that 75% of the change in the y variable is due to the
linear relationship between the x and y variables. - accurate answers-TRUE
Describe the relationship between a student's grade in class and the number
of absences in that class. - accurate answers-negative relationship
TRUE OR FALSE
The graph of a correlation is a scatter plot. - accurate answers-True
The ages of the 35 members of a track and field team are listed below.
Construct a box plot for the data set.
, 15 16 18 18 18 19 20
20 20 21 21 22 22 23
23 24 24 24 25 25 26
27 27 28 29 29 30 31
31 33 34 35 39 42 48 - accurate answers-15,20, 24, 30, 48 (picture)
Bill kept track of the number of hours he spent exercising each week. The
results for four months are shown below. Find the mean number of hours Bill
spent exercising per week. Round your answer to two decimal places.
8.40 6.50 8.10 7.70 8.60 8.40
6.70 8.10 6.60 8.40 7.70 6.90
7.80 6.50 6.50 7.60 8.60 6.70 - accurate answers-7.54
The weights (in ounces) of 21 cookies are shown. Find the median weight.
0.73 1.35 0.68 1.62 0.87 0.78 1.32
1.35 1.53 0.92 0.73 1.35 1.09 0.85
0.47 1.35 0.78 1.09 1.72 0.87 0.56 - accurate answers-0.92
The weights (in ounces) of 14 different apples are shown below. Find the
mode(s) of the data.
5.5 4.6 4.5 5.3 4.0 5.5 4.6
6.1 5.6 5.3 5.5 6.1 5.3 5.8 - accurate answers-5.5, 5.3
Use the given sample data to find Q3.
49 52 52 52 74 67 55 55 - accurate answers-61.0
Jeanne is currently taking college economics. The instructor often gives
quizzes. On the past five quizzes, Jeanne got the following scores:
5 19 2 13 9
Compute the range. - accurate answers-17
Find the variance for the given data. Round your answer to one more decimal
place than the original data.
7.9, 3.1, 2.9, 1.4, and 7.1 - accurate answers-8.11
