Probability and Statistics Test with Actual
Questions and Verified Answers| Latest
2026/2027
The mean game scores and standard deviations of
four seasons of a football team given below? Which
statement must be true? - ANSWER-The game scores
of season 2005 have a greater speed than the game
scores of season 2006.
The mean of a set credit score is u = 690 and o = 14.
Which statement must be true? - ANSWER-C. Z690 is
between 2 and 3 standard deviations of the mean.
The histogram below represents the number of points
Mandy scored per game. The graph makes the data
appear symmetric when it is actually skewed. How can
the graph be adjusted to the skew? - ANSWER-C. The
scale on the x-axis can be increased to show the
interval 25-29.
Sonia rolls a six-sided number cube 12 times and
records if she rolls a 2. What is the number of trials
for the binomial experiment? - ANSWER-C. 12, Sonia
rolls it 12 times, so there's 12 trials.
, According to a poll, 56% of voters support funding a
new community center. A surveyor randomly selects
75 voters and asks each voter if he or she is in favor
of the center. If being in favor of the center is a
success, what is the probability of a success for this
binomial experiment? - ANSWER-0.56
For a standard normal distribution, which of the
following expressions must always be equal to 1? -
ANSWER-D. P(z<-a)+P(-a<z<a)+P(Z>a)
Emi computes the mean and variance for the
population data set 87, 46, 90, 78, and 89. She finds
the mean is 78. Help finding her steps for finding the
variance are shown below. What is the first error she
made in computing the variance? - ANSWER-C. Emi
evaluated (46-78)2 as -(32)2.
Which normal distribution has the greatest standard
deviation? - ANSWER-Graph C
The resting heart rates for 80 women aged 46-55 in a
simple random sample are normally distributed with a
mean of 71 beats per minute and a standard deviation
of 6 beats per minute. Assuming a 90% confidence
level (90% confidence level = z-score of 1.645), what
is the margin of error for the population mean? -
ANSWER-ME = 1.645(6)/sqrt80 = 1.1
Questions and Verified Answers| Latest
2026/2027
The mean game scores and standard deviations of
four seasons of a football team given below? Which
statement must be true? - ANSWER-The game scores
of season 2005 have a greater speed than the game
scores of season 2006.
The mean of a set credit score is u = 690 and o = 14.
Which statement must be true? - ANSWER-C. Z690 is
between 2 and 3 standard deviations of the mean.
The histogram below represents the number of points
Mandy scored per game. The graph makes the data
appear symmetric when it is actually skewed. How can
the graph be adjusted to the skew? - ANSWER-C. The
scale on the x-axis can be increased to show the
interval 25-29.
Sonia rolls a six-sided number cube 12 times and
records if she rolls a 2. What is the number of trials
for the binomial experiment? - ANSWER-C. 12, Sonia
rolls it 12 times, so there's 12 trials.
, According to a poll, 56% of voters support funding a
new community center. A surveyor randomly selects
75 voters and asks each voter if he or she is in favor
of the center. If being in favor of the center is a
success, what is the probability of a success for this
binomial experiment? - ANSWER-0.56
For a standard normal distribution, which of the
following expressions must always be equal to 1? -
ANSWER-D. P(z<-a)+P(-a<z<a)+P(Z>a)
Emi computes the mean and variance for the
population data set 87, 46, 90, 78, and 89. She finds
the mean is 78. Help finding her steps for finding the
variance are shown below. What is the first error she
made in computing the variance? - ANSWER-C. Emi
evaluated (46-78)2 as -(32)2.
Which normal distribution has the greatest standard
deviation? - ANSWER-Graph C
The resting heart rates for 80 women aged 46-55 in a
simple random sample are normally distributed with a
mean of 71 beats per minute and a standard deviation
of 6 beats per minute. Assuming a 90% confidence
level (90% confidence level = z-score of 1.645), what
is the margin of error for the population mean? -
ANSWER-ME = 1.645(6)/sqrt80 = 1.1
