Question 1

From past history, the scores on a statistics test are normally distributed with a mean score of 70 and a standard deviation of 5. To earn a "C" on the test, a student must be in the top 25% of the class. What should a student score to receive a "C"? _______

Accepted Answer

The answer of From past history, the scores on a...

Question 2

A study conducted by a local tennis center revealed that 25 percent of its new members have novice level tennis skills. A membership drive in a metropolitan area resulted in 500 new members. It has been suggested that the normal approximation to the binomial be used to calculate various probabilities. In this problem, can the normal approximation to the binomial be applied? Explain.

Accepted Answer

The answer of A study conducted by a local tennis...

Question 3

Two business major students, in two different sections of an economics class, were comparing test scores. The following gives the students scores, class mean, and standard deviation for each section.  Which student scored better compared to the rest of the section? _______________

Accepted Answer

The answer of Two business major students, in two different...

Question 4

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what is the average monthly amount charged? _______

Accepted Answer

The answer of A major credit card company has determined...

Question 5

A sample of 500 evening students revealed that their annual incomes were normally distributed with a mean income of $30,000 and a standard deviation of $3,000. What is the income that separates the top 25% from the lower 75% of the incomes?

Accepted Answer

The answer of A sample of 500 evening students revealed...

Question 6

The weight of a bag of corn chips is normally distributed with a mean of 22 ounces and a standard deviation of ½ ounces. What is the probability that a bag of corn chips weighs between 20.75 and 23.25 ounces? _____

Accepted Answer

The answer of The weight of a bag of corn...

Question 7

The weight of a bag of corn chips is normally distributed with a mean of 22 ounces and a standard deviation of ½ ounces. What is the probability that a bag of corn chips weighs more than 21 ounces? _____

Accepted Answer

The answer of The weight of a bag of corn...

Question 8

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what percent of monthly charges are between $600 and $889? ____________

Accepted Answer

The answer of A major credit card company has determined...

Question 9

For the standard normal distribution, what z-score corresponds with the 85% percentile? _________

Accepted Answer

The answer of For the standard normal distribution, what z-score...

Question 10

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what percent of monthly changes are between $311 and $889? ________

Accepted Answer

The answer of A major credit card company has determined...

Question 11

The exponential distribution is applied to situations characterized by _______.

Accepted Answer

The answer of The exponential distribution is applied to situations...

Question 12

Two business major students, in two different sections of an economics class, were comparing test scores. The following gives the students scores, class mean, and standard deviation for each section.  What is the z-score of the student from section 2? _____________

Accepted Answer

The answer of Two business major students, in two different...

Question 13

The exponential distribution can be used to predict ________.

Accepted Answer

The answer of The exponential distribution can be used to...

Question 14

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what is the standard deviation of the monthly amount charged? _________

Accepted Answer

The answer of A major credit card company has determined...

Question 15

Two business major students, in two different sections of an economics class, were comparing test scores. The following gives the students scores, class mean, and standard deviation for each section.  What is the z-score of the student from section 1? _____________

Accepted Answer

The answer of Two business major students, in two different...

Question 16

A study conducted by a local tennis center revealed that 25 percent of its new members have novice level tennis skills. A membership drive in a metropolitan area resulted in 500 new members. What is the probability that 150 or more of the new members are novice tennis players?

Accepted Answer

The answer of A study conducted by a local tennis...

Question 17

A sample of 500 evening students revealed that their annual incomes were normally distributed with a mean income of $30,000 and a standard deviation of $3,000. How many students earned more than $36,000? _______

Accepted Answer

The answer of A sample of 500 evening students revealed...

Question 18

For the standard normal distribution, what z-score corresponds with the first quartile? _________

Accepted Answer

The answer of For the standard normal distribution, what z-score...

Question 19

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what is the 3^rd quartile of the distribution? _____________

Accepted Answer

The answer of A major credit card company has determined...

Question 20

A study conducted by a local tennis center revealed that 25 percent of its new members have novice level tennis skills. A membership drive in a metropolitan area resulted in 500 new members. What is the mean and standard deviation to apply the normal approximation to the binomial?

Accepted Answer

The answer of A study conducted by a local tennis...

Quiz 7: Continuous Probability Distributions

From past history, the scores on a statistics test are normally distributed with a mean score of 70 and a standard deviation of 5. To earn a "C" on the test, a student must be in the top 25% of the class. What should a student score to receive a "C"? _______

Two business major students, in two different sections of an economics class, were comparing test scores. The following gives the students scores, class mean, and standard deviation for each section. Which student scored better compared to the rest of the section? _______________

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what is the average monthly amount charged? _______

A sample of 500 evening students revealed that their annual incomes were normally distributed with a mean income of $30,000 and a standard deviation of $3,000. What is the income that separates the top 25% from the lower 75% of the incomes?

The weight of a bag of corn chips is normally distributed with a mean of 22 ounces and a standard deviation of ½ ounces. What is the probability that a bag of corn chips weighs between 20.75 and 23.25 ounces? _____

The weight of a bag of corn chips is normally distributed with a mean of 22 ounces and a standard deviation of ½ ounces. What is the probability that a bag of corn chips weighs more than 21 ounces? _____

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what percent of monthly charges are between $600 and $889? ____________

For the standard normal distribution, what z-score corresponds with the 85% percentile? _________

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what percent of monthly changes are between $311 and $889? ________

The exponential distribution is applied to situations characterized by _______.

Two business major students, in two different sections of an economics class, were comparing test scores. The following gives the students scores, class mean, and standard deviation for each section. What is the z-score of the student from section 2? _____________

The exponential distribution can be used to predict ________.

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what is the standard deviation of the monthly amount charged? _________

Two business major students, in two different sections of an economics class, were comparing test scores. The following gives the students scores, class mean, and standard deviation for each section. What is the z-score of the student from section 1? _____________

A study conducted by a local tennis center revealed that 25 percent of its new members have novice level tennis skills. A membership drive in a metropolitan area resulted in 500 new members. What is the probability that 150 or more of the new members are novice tennis players?

A sample of 500 evening students revealed that their annual incomes were normally distributed with a mean income of $30,000 and a standard deviation of $3,000. How many students earned more than $36,000? _______

For the standard normal distribution, what z-score corresponds with the first quartile? _________

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what is the 3rd quartile of the distribution? _____________

A study conducted by a local tennis center revealed that 25 percent of its new members have novice level tennis skills. A membership drive in a metropolitan area resulted in 500 new members. What is the mean and standard deviation to apply the normal approximation to the binomial?

A major credit card company has determined that customers charge between $100 and $1100 per month. Given that the average monthly amount charged is uniformly distributed, what is the 3^rd quartile of the distribution? _____________