Question 1

At a computer manufacturing company,the actual size of computer chips is normally distributed with a mean of 1 cm and a standard deviation of 0.1 cm.A random sample of 12 computer chips is taken.What is the probability that the sample mean will be between 0.99 and 1.01 cm?

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Question 2

A manufacturer of power tools claims that the average amount of time required to assemble their top-of-the-line table saw is 80 minutes with a standard deviation of 40 minutes.Suppose a random sample of 64 purchasers of this table saw is taken.So,95% of the sample means based on samples of size 64 will be between ________ and ________.

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Question 3

The amount of pyridoxine (in grams)per multiple vitamin is normally distributed with μ = 110 grams and σ = 25 grams.A sample of 25 vitamins is to be selected.What is the probability that the sample mean will be less than 100 grams?

Accepted Answer

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Question 4

The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0.Suppose 36 golfers played the course today.Find the probability that the average score of the 36 golfers exceeded 71.

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Question 5

The amount of pyridoxine (in grams)per multiple vitamin is normally distributed with μ = 110 grams and σ= 25 grams.A sample of 25 vitamins is to be selected.So,the middle 70% of all sample means will fall between what two values?

Accepted Answer

The answer of The amount of pyridoxine (in grams)per multiple...

Question 6

The amount of bleach a machine pours into bottles has a mean of 1080 grams with a standard deviation of 4.5 grams.Suppose we take a random sample of 36 bottles filled by this machine.So,95% of the sample means based on samples of size 36 will be between ________ and ________.

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Question 7

The amount of pyridoxine (in grams)per multiple vitamin is normally distributed with μ = 110 grams and σ = 25 grams.A sample of 25 vitamins is to be selected.What is the probability that the sample mean will be between 100 and 120 grams?

Accepted Answer

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Question 8

The distribution of the number of loaves of bread sold per day by a large bakery over the past 5 years has a mean of 7,750 and a standard deviation of 145 loaves.Suppose a random sample of n = 40 days has been selected.What is the approximate probability that the average number of loaves sold in the sampled days exceeds 7,895 loaves?

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Question 9

A manufacturer of power tools claims that the average amount of time required to assemble their top-of-the-line table saw is 80 minutes with a standard deviation of 40 minutes.Suppose a random sample of 64 purchasers of this table saw is taken.The probability that the sample mean will be between 77 and 89 minutes is ________.

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Question 10

A manufacturer of power tools claims that the average amount of time required to assemble their top-of-the-line table saw is 80 minutes with a standard deviation of 40 minutes.Suppose a random sample of 64 purchasers of this table saw is taken.The standard deviation of the sampling distribution of the sample mean is ________ minutes.

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Question 11

The amount of pyridoxine (in grams)per multiple vitamin is normally distributed with μ = 110 grams and σ= 25 grams.A sample of 25 vitamins is to be selected.So,95% of all sample means will be greater than how many grams?

Accepted Answer

The answer of The amount of pyridoxine (in grams)per multiple...

Question 12

At a computer manufacturing company,the actual size of computer chips is normally distributed with a mean of 1 cm and a standard deviation of 0.1 cm.A random sample of 12 computer chips is taken.What is the probability that the sample mean will be below 0.95 cm?

Accepted Answer

The answer of At a computer manufacturing company,the actual size...

Question 13

A manufacturer of power tools claims that the average amount of time required to assemble their top-of-the-line table saw is 80 minutes with a standard deviation of 40 minutes.Suppose a random sample of 64 purchasers of this table saw is taken.The probability that the sample mean will be greater than 88 minutes is ________.

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Question 14

The amount of pyridoxine (in grams)per multiple vitamin is normally distributed with μ = 110 grams and σ = 25 grams.A sample of 25 vitamins is to be selected.What is the probability that the sample mean will be greater than 100 grams?

Accepted Answer

The answer of The amount of pyridoxine (in grams)per multiple...

Question 15

The amount of bleach a machine pours into bottles has a mean of 1080 grams with a standard deviation of 4.5 grams.Suppose we take a random sample of 36 bottles filled by this machine.The probability that the mean of the sample is less than 1080.9 is ________.

Accepted Answer

The answer of The amount of bleach a machine pours...

Question 16

A manufacturer of power tools claims that the average amount of time required to assemble their top-of-the-line table saw is 80 minutes with a standard deviation of 40 minutes.Suppose a random sample of 64 purchasers of this table saw is taken.The probability that the sample mean will be less than 82 minutes is ________.

Accepted Answer

The answer of A manufacturer of power tools claims that...

Question 17

The amount of bleach a machine pours into bottles has a mean of 1080 grams with a standard deviation of 4.5 grams.Suppose we take a random sample of 36 bottles filled by this machine.The probability that the mean of the sample is between 1018.9 and 1022.3 grams is ________.

Accepted Answer

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Question 18

At a computer manufacturing company,the actual size of computer chips is normally distributed with a mean of 1 cm and a standard deviation of 0.1 cm.A random sample of 12 computer chips is taken.Above what value do 2.5% of the sample means fall?

Accepted Answer

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Question 19

The amount of bleach a machine pours into bottles has a mean of 1080 grams with a standard deviation of 4.5 grams.Suppose we take a random sample of 36 bottles filled by this machine.The probability that the mean of the sample is between 1078.2 and 1079.4 grams is ________.

Accepted Answer

The answer of The amount of bleach a machine pours...

Question 20

A manufacturer of power tools claims that the average amount of time required to assemble their top-of-the-line table saw is 80 minutes with a standard deviation of 40 minutes.Suppose a random sample of 64 purchasers of this table saw is taken.The mean of the sampling distribution of the sample mean is ________ minutes.

Accepted Answer

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Quiz 7: Sampling Distributions

At a computer manufacturing company,the actual size of computer chips is normally distributed with a mean of 1 cm and a standard deviation of 0.1 cm.A random sample of 12 computer chips is taken.What is the probability that the sample mean will be between 0.99 and 1.01 cm?

The amount of pyridoxine (in grams)per multiple vitamin is normally distributed with μ = 110 grams and σ = 25 grams.A sample of 25 vitamins is to be selected.What is the probability that the sample mean will be less than 100 grams?

The average score of all pro golfers for a particular course has a mean of 70 and a standard deviation of 3.0.Suppose 36 golfers played the course today.Find the probability that the average score of the 36 golfers exceeded 71.

The amount of pyridoxine (in grams)per multiple vitamin is normally distributed with μ = 110 grams and σ= 25 grams.A sample of 25 vitamins is to be selected.So,the middle 70% of all sample means will fall between what two values?

The amount of bleach a machine pours into bottles has a mean of 1080 grams with a standard deviation of 4.5 grams.Suppose we take a random sample of 36 bottles filled by this machine.So,95% of the sample means based on samples of size 36 will be between and .

The amount of pyridoxine (in grams)per multiple vitamin is normally distributed with μ = 110 grams and σ = 25 grams.A sample of 25 vitamins is to be selected.What is the probability that the sample mean will be between 100 and 120 grams?

The amount of pyridoxine (in grams)per multiple vitamin is normally distributed with μ = 110 grams and σ= 25 grams.A sample of 25 vitamins is to be selected.So,95% of all sample means will be greater than how many grams?

At a computer manufacturing company,the actual size of computer chips is normally distributed with a mean of 1 cm and a standard deviation of 0.1 cm.A random sample of 12 computer chips is taken.What is the probability that the sample mean will be below 0.95 cm?

The amount of pyridoxine (in grams)per multiple vitamin is normally distributed with μ = 110 grams and σ = 25 grams.A sample of 25 vitamins is to be selected.What is the probability that the sample mean will be greater than 100 grams?

The amount of bleach a machine pours into bottles has a mean of 1080 grams with a standard deviation of 4.5 grams.Suppose we take a random sample of 36 bottles filled by this machine.The probability that the mean of the sample is less than 1080.9 is ________.

The amount of bleach a machine pours into bottles has a mean of 1080 grams with a standard deviation of 4.5 grams.Suppose we take a random sample of 36 bottles filled by this machine.The probability that the mean of the sample is between 1018.9 and 1022.3 grams is ________.

At a computer manufacturing company,the actual size of computer chips is normally distributed with a mean of 1 cm and a standard deviation of 0.1 cm.A random sample of 12 computer chips is taken.Above what value do 2.5% of the sample means fall?

The amount of bleach a machine pours into bottles has a mean of 1080 grams with a standard deviation of 4.5 grams.Suppose we take a random sample of 36 bottles filled by this machine.The probability that the mean of the sample is between 1078.2 and 1079.4 grams is ________.