Estimate the mean age of all people in the civilian labor force. What sample is needed to obtain a 98% confidence interval to estimate the pop mean age of all people in the civilian labor force with width equal to 3 years, given the population standard deviation is 22.18 years?

Q: mple of 400 items is found to have mean of 82 and standard deviation is 18. Find 95% confidence…

A: Given: Sample mean x¯=82     Sample standard deviation (s) = 18 Sample size (n) = 400 Confidence…

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A:

Q: the manager of a radio station wants to estimate the mean age of listeners to a specific program…

A: Given information- Confidence interval = 0.98 Significance level (α) = 1- 0.98 = 0.02 Population…

Q: The random sample is 100 students 16 to 22 years old. The mean of hours they sleep is 8.9 hrs and…

A: Given,sample size(n)=100mean(μ)=8.9standard deviation(s)=2.2α=1-0.95=0.05α2=0.025degrees of…

Q: a)  A histogram of time spent eating and drinking each day is skewed right. Use this result to…

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A: According to the given question A data set includes 103 body temperatures of healthy adult humans…

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A: Consider that the mean and standard deviation of a random variable X are µ and σ, respectively.…

Q: A sample of 42 observations is taken from a normal population with a standard deviation of 8. The…

A: Answer: From the given data, Sample size(n) = 42 Mean (X¯) = 45 Standard deviation(σ) = 8 99%…

Q: Determine the sample size required to estimate the mean score on a standardized test within 4 points…

A:

Q: Construct a 95% confidence interval containing the population mean of the height of giraffes if a…

A: We want to find the 95% CI for population mean μ

Q: How much do wild mountain lions weigh? Six adult wild mountain lions are captured and released.…

A: Given data , 68, 104, 128, 122, 60, and 64.

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A: The population standard deviation is 2.2.

Q: A researcher has collected the blood samples of 29 individuals and found that the mean hemoglobin…

A: Given information :  A researcher has collected the blood samples of 29 individuals and found that…

Q: How large a sample should be selected to provide a 95% confidence interval with a margin of error of…

A: The following information has been provided: The confidence level is 95%. The margin of Error is…

Q: A data set includes 109 body temperatures of healthy adult humans having a mean of 98.2°F and a…

A: The random variable X follows normal distribution. The sample size is 109. The sample mean is 98.2.…

Q: A sample of 48 observations is taken from a normal population with a standard deviation of 17. The…

A:

Q: Brown measured his book using a different shaped ruler. He got different measurements, namely 30,…

A: Given that  Different measurements he got 30 , 35 , 29 , 33 , 32 , 28 , 28 , 35 Sum of data value =…

Q: A random sample of 16 students showed a mean weight of 130lbs. The population standard deviation of…

A:

Q: Suppose the mean height in inches of all 9th grade students at one high school is estimated. The…

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Q: A study of 100 apple trees showed that the average number of apples per tree was 1000. The standard…

A: Computation of critical value: 1-α=0.92α=0.08α2=0.041-α2=0.96 The critical value of z-distribution…

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A: The formula for the confidence interval for the mean is (sample mean - E, sample mean + E), where E…

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A: Answer: From the given data, Sample size(n) = 22 mean (x¯) = 35 Standard deviation(σ) = 10 95%…

Q: Determine the margin of error in estimating the population mean, μ. Based on a sample of size 45, a…

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Q: random sample of 100 commute times is collected from the entire population of commuters in the…

A: mean = 45 standard deviation = 30 n = 100

Q: Determine the sample size required to estimate the mean score on a standardized test within   4…

A: The confidence interval is used to estimate the population parameter. The confidence interval gives…

Q: A random sample of 56 fluorescent light bulbs has a mean life of 645 hours and assume that the…

A: Given,sample size(n)=56sample mean(x¯)=645population standard…

Q: Find the sample size required to estimate the mean IQ of all college students. Assume w want a 90…

A: Given : Margin of error, ME = 2.0 population standard deviation, σ = 15.0…

Q: A recording company wants to estimate the mean length of musical cd’s being recorded. A random…

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Q: A sample of 28 adults attending a country fair determined that the mean age was 33,given that the…

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Q: ose the mean height in inches of all 9th grade students at one high school is estimated. The…

A:

Q: Suppose the mean height in inches of all 9th grade students at one high school is estimated. The…

A: Given: n = 8 Population standard deviation σ = 5 Formula Used:

Q: An EQ Test was administered to random sample of 130 grade school pupils. The sample mean was 95.8…

A: According to the given information in this question We need to find the confidence interval 99%