(Topic: Confidence Interval Estimation for the Mean of a Normal Distribution: Population Variance Known) The number...

(Topic: Confidence Interval Estimation for the Mean of a Normal Distribution: Population Variance Known)

The number of bolts produced each hour from a particular machine is normally distributed with a standard deviation of 7.4. For a random sample of 15 hours, the average number of bolts produced was 587.3.

Find the upper and lower confidence limits of a 98% confidence interval for the population mean number of bolts produced per hour.

Find the answer by hand calculation.
Find the answer using Minitab.
Interpret the confidence interval verbally.

The number of television sets produced from an assembly line each day is known to have a standard deviation of 17.4 sets per day. The production line averaged 452.3 sets per day for 20 randomly selected days. Which of the following represents a 95% confidence interval for the population mean number of sets per hour?

You are interested in determining the amount of time (in minutes) you spend each day on the Internet. For seven days, these values are: 51, 24, 16, 88, 63, 28, and 59. Assume that the amount of time you spend on the Internet each day is normally distributed, and develop a 90% confidence interval for the population average amount of time.

Expert Solution

a)

b)

c) Interpretation : Out of 100 samples drawn, sample mean will be between (582.28, 592.32) for 95 samples.

d)

orchestra answered 1 year ago

A confidence interval for the population mean when the population follows the normal distribution and the population standard deviation is known is computed by? Provide examples.

Question 3 A confidence interval for the population mean when the population follows the normal distribution and the population standard deviation is known is computed by? Provide examples. Question 6 What are the factors that determine the sample size? How is sample size calculated for estimating the population mean? Provide examples

For normal population with known standard deviation, the x% confidence interval for the population mean µ...

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PROJECT 4 Estimation of the Population Mean of Soft Plaque Deposit (Confidence Interval of the Mean)....

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Determine the 95% confidence interval estimate for the population mean of a normal distribution given n=144,...

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Determine the 80% confidence interval estimate for the population mean of a normal distribution given n=100,...

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For a normal population with known variance (sigma)^2, what is the confidence level for the CI...

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Consider a normal population distribution with the value of o known. (a) What is the confidence...

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