2. (10%) Given a sample with s = 8.5 and n = 21. Estimate the population standard deviation with 90% of confidence level. %3D

Q: Determine the margin of error for the confidence interval for the mean: 18+1.5 The margin of error…

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Q: The prices of used books at a large college bookstore are normally distributed. If a sample of 23…

A: From the provided information, Sample size (n) = 23 Sample mean (x̅) = $27.50 Sample standard…

Q: Nationally, patients who go to the emergency room wait an average of 6 hours to be admitted into the…

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Q: tried on 20 prospective employees and produces a sample standard deviation of 8 points. Are scores…

A: Given data : sample size, n = 20 population standard deviation,σ= 5 sample…

Q: Determine the margin of error, m, for a 95% confidence interval when the sample size is n = 21 and…

A: Given that , Sample size (n) = 21 Sample standard deviation (s) = 17 To find margin of error (m) for…

Q: A sample of size 10 is taken from the population of morel mushrooms and used to calculate an average…

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Q: For a sample of 35 items from a population for which the standard deviation is 5 20.5, the sample…

A: Given data is appropriate for z-test for single mean . because it is a large sample test (n>30).…

Q: A large pizzeria makes 1000 pies per day. The mean diameter of u=10.1 inches and the standard…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: R2/ A sample was taken from normal distribulion N(M, 25) . whatis the sample size to get a length…

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Q: A sporting goods store believes the average age of its customers is 37 or less. A random sample of…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Determine sample size for the estimation of the population proportion E=0.024 95%confidence…

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Q: a)Test at the 1% significance level, do the data provide sufficient evidence to conclude that the…

A: (a) The sample size is 20, sample mean is 4.76, sample standard deviation is 2.30, and population…

Q: Goofy Marketing Solutions conducted a survey among 16 randomly selected visitors to the newly opened…

A:

Q: a chemist analysis an iron ore for FeO.and obtained value of 12.35% with a standard deviation of…

A: Given:Sample size, n=4Confidence level=95%

Q: A simple random sample of 60 items resulted in a sample mean of 80. The populationstandard deviation…

A: Sample size = n = 60, Sample mean = = 80, Population standard deviation = s = 15, Confidence…

Q: according to the International Journal of Retail and Distribution Management (Vol. 39, 2011) survey…

A:

Q: A random sample of 81 credit sales in a department store showed an average sale of $75.00. From past…

A: Solution: Let X be the amount of sale. From the given information, n=81, x-bar=$75 and σ=$27.

Q: For an SRS of 66 students, the average exam score was a 73. Assume you know the population standard…

A: Given,Standard deviation(σ)=10margin of error(E)=1.0α=1-0.99=0.01α2=0.005Z0.005=2.58     (from…

Q: A sample of 10 measurements of the diameter of a sphere gave a mean 438mm and a standard deviation 6…

A: From the provided information,

Q: GIVEN: POPULATION MEAN: 94.60 AND POPULATION STANDARD DEVIATION: 2.3324 What is the percentage that…

A:

Q: A sample of 50 students was taken from the local university. These students spent an average of R170…

A: Given information- Sample size (n) = 50 Mean x̅ = R170 Standard deviation (s) = R25.50 Significance…

Q: C. Find a 95% confidence interval for the average life time of all the television sets produced by a…

A:

Q: A researcher is interested in the decrease in adolescent BMI after a new after school program is…

A:

Q: A simple random sample of 40 items resulted in a sample mean of 25. The population standard…

A:

Q: The average salary of 64 employee was 5400 and the sample standard deviation was 270. Find the 90%…

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Q: 1. The average height of the students in a famous college in the city is unknown but the standard…

A: 1. The population standard deviation is 0.8, sample size is 49, and sample mean is 6.1. Computation…

Q: f the manager of a bottled water distributor wants to​ estimate, with 95​% ​confidence, the mean…

A: Given,margin of error(E)=0.004standard deviation(σ)=0.04α=1-0.95=0.05α2=0.025Z0.025=1.96     (from…

Q: For a sample of 35 items from a population for which the standard deviation is 5 20.5, the sample…

A: Given data is appropriate for z-test for single mean. because it is a large sample test .(n>30)

Q: A random sample of 17 hotels in Boston had an average nightly room rate of $165.40 with a sample…

A: Followings are the Explanation of the question  Use the t distribution to calculate t critical value…

Q: e to construct a 90% confidence Interval to estimate the population mean annual income for people…

A: μ = 40416.5σ = 7545

Q: For a sample of 35 items from a population for which the standard deviation is σ = 20.5, the sample…

A:

Q: . Data from a sample of 576 people in a city was used to estimate the mean monthly bill paid by city…

A: We associate with the interval estimate is called a confidence interval. This probability indicates…

Q: To find the standard deviation of the diameter of wooden dowels, the manufacturer measures 19…

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Q: Given that the population standard deviation is 1, determine the minimum sample size needed in order…

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Q: Q2: Assume the population standard deviation o of the student height in survey is 9.48. Find the…

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Q: The following information was retrieved from Tennessee Valley Authority system on dissolved oxygen…

A: Given,   Sample size = 20 Sample mean = 3.856 Sample standard deviation = 2.024   Since the…

Q: Assume that a sample is used to estimate a population mean µ. Find the margin of error M.E, that…

A:

Q: Assume that a sample is used to estimate the mean tip earned by a serving staff at a diner. F margin…

A: Given data,Sample size n=23Mean x=98.31standard deviation s=8.23Find Margin of error for 98% CI?

Q: B. You need to estimate the mean number of travel days per year for sales people.The mean of a small…

A: Given Information :  You need to estimate the mean number of travel days per year for sales people.…

Q: Assuming that the population is normally distributed, construct a 95% confidence interval for the…

A: Construct the 95% confidence interval for the population mean. The 95% confidence interval for the…

Q: Compute a 95% confidence interval for the true population mean given the following  10 data that…

A: Given, Sample size = 10 Sample mean = 15.3 Sample standard deviation = 3.5   Since the population…

Q: Do a hypothesis for the following, make sure to include and label all five steps:   Test the claim…

A:

Q: The chancellor wants you to calculate the sample size needed with a margin of error of 5, 90%…

A: Using Excel formula “=NORM.S.INV(1-(0.10/2))”, the critical value for 90% is obtained as 1.645.

Q: se the given degree of confidence and sample data to construct a confidence interval for the…

A: We have given that  Sample size n= 30 Sample mean = 90 Standard deviation = 6.7 99% confidence…

Q: The heights of the 1320 lower school students at Poole High School are normally distributed with…

A: Confidence interval: It is defined as the range which contains the value of true population…

Q: The life time (age) in hours of a random sample of one of the batteries produced in Jordan gave the…

A: Solution: Given information: n=9 Sample size  x=95 Sample mean s= 3 Sample standard deviationα=0.02…

Q: Find the critical value t, for the confidence level c = 0.80 and sample sizen=11. | Click the icon…

A: We have to find critical value..

Q: Determine the margin of error, m, for a 95% confidence interval when the sample size is n = 19 and…

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find…