soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.14 inch. ​(a) Determine the minimum sample size required to construct a 99​% confidence interval for the population mean. Assume the population standard deviation is 0.6 inch. ​(b) The sample mean is 28.4 inches. With a sample size of 133​, a 99​% level of​ confidence, and a population standard deviation of 0.6 ​inch, does it seem possible that the population mean could be less than 28.5 ​inches? Explain. Click here to view page 1 of the Standard Normal Table. LOADING... Click here to view page 2 of the Standard Normal Table. LOADING...

Q: A researcher wishes to find a 90% confidence interval estimate for an unknown population mean with a…

A:

Q: You measure 21 watermelons' weights, and find they have a mean weight of 47 ounces. Assume the…

A: sample size (n)=21Mean()=47standard deviation()=5.6confidence level=90%

Q: How large a sample should be selected to provide a 99% confidence interval with a margin of error of…

A: Given,standard deviation(σ)=50margin of error (E)=10α=1-0.99=0.01α2=0.005Z0.005=2.58

Q: Based on previous school records, the standard deviation of the height of Grade 10 students in a…

A: Confidence interval is an interval such that the probability of the unknown parameter to be included…

Q: Researchers from a certain country were interested in how characteristics of Uie spI environment…

A:

Q: A quality control manager wants to be sure that the standard deviation of oil containers is below a…

A: Let Xi be the amount of oil in the ith container,i=1,2,...,n.

Q: We are interested in estimating the average amount spent per customer for lunch in a restaurant in…

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

Q: We take a sample of 50 people and obtain a sample mean of 147 pounds with a standard deviation of 15…

A: We have given that  Sample size n = 50 Sample mean = 147 Standard deviation = 15 90%confidence…

Q: The quality control manager at a light bulb factory needs to estimate the mean life of a large…

A: Given data Sample size(n) = 49 Sample mean x̅  = 370 hours Population standard deviation = 77…

Q: A sample of 22 households uses an average of 346.2 gallons of water per day, with a sample standard…

A: The sample size is 22, sample mean is 346.2 and sample standard deviation is 50.5.

Q: the standard deviation of the 16 observations was 0.95 inches (again, the sample mean was 17.2).…

A: Given :  Standard deviation of the 16 observations was 0.95 inches & the sample mean was 17.2.…

Q: A researcher collected sample data for 17 women ages 18 standard deviation of 9.3. Assuming that…

A:

Q: if E=0.07 and population standard deviation=0.8 then find the sample size for 99% confidence…

A: Margin of error(E)=0.07 population standard deviation(σ)=0.8 confidence level=99%

Q: Noise levels in a hospital were measured at 81 different locations. The average level was found to…

A: It is given that, Sample mean = 61.2 decibels. Sample standard deviation, s is 7.9 decibels. The…

Q: A random sample of 11 fields of spring wheat has a mean yield of 20.2 bushels per acre and standard…

A: Sample size, n=11 Sample mean, x¯=20.2 Sample sd, s=5.19 CL=0.99

Q: The total of individual weights of garbage discarded by 17 households in one week is normally…

A:

Q: what is the maximal margin of error associated

A: You measure 26 watermelons' weights, and find they have a mean weight of 31 ounces. Assume the…

Q: Construct a 90% Confidence Interval for the mean.

A: Let  be the population mean of water per day.Given that,Sample size Sample mean Sample standard…

Q: The mean IQ score of a sample of 61 students selected from a high school is 93. Suppose the standard…

A: Construct the 99% confidence interval for the population mean The 99% confidence interval for the…

Q: Dr. Moore wanted to estimate the mean cholesterol level for all adult men living in Hartford... He…

A:

Q: What is the sample size required to construct a 90% confidence interval for the population mean with…

A: Given,E=0.2z-value at 90% confidence is Zc=1.645Let the last two digits of your student ID is…

Q: You measure 20 dogs' weights, and find they have a mean weight of 44 ounces. Assume the population…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

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

A:

Q: The data set below represents the ages of 36 executives. Find the percentile that corresponds to an…

A: From the given data: n=36   number of values below 62=30

Q: In a survey study conducted with students who graduated from the engineering faculty, the number of…

A: We have to find food engineering in the circle chart...

Q: The total of individual weights of garbage discarded by 15 households in one week is normally…

A: The total of individual weights discarded by 15 households is normally distributed with mean 29.7…

Q: You want to estimate the mean weight of quarters in circulation. A sample of 50 quarters has a mean…

A: From the provided information, Sample size (n) = 50 Sample mean (x̄) = 5.625 grams Standard…

Q: A popular weight loss program claims users will lose weight each month. Linda samples 25 dieters and…

A: We have given that,  Sample mean (x̄) = 10 pounds, standard deviation (s) = 2 pounds and sample size…

Q: We are interested in estimating the average amount spent per customer for lunch in a restaurant at…

A:

Q: A fast food executive wishes to know how many fast food meals adults eat each week. They want to…

A: The Critical values table for normal distribution

Q: A NAPA Auto Parts supplier wants information about how long car owners plan to keep their cars. A…

A: From the provided information, Sample size (n) = 41 Sample mean (x̅) = 7 Sample standard deviation…

Q: The pH of rain, measured at a weather station in Michigan, was observed for 39 consecutive rain…

A:

Q: A small business wanted to estimate the mean income from their customers. They took a sample of 256…

A: We have to find  the 90% confidence interval estimate for the population mean income of their…

Q: Sales personnel for City Distributors Inc. submit weekly reports listing the customer complaints…

A: Given Information: Sample size (n) = 8 Sample mean (x¯) = 8 Sample standard deviation (s) = 3.464 To…

Q: a sample 1000 website users, the research department reports an average age of 39. If the population…

A: GIVEN DATA,n=1000x¯=39σ=9.5CI=0.90α=1-0.90=0.10α/2=0.10/2=0.05we have to find out the upper bound…

Q: The caffeine consumption of a random sample of 50 students showed a mean of 14.4 oz and a standard…

A: The question is about confidence interval Given : Randomly selected no. of student ( n ) = 50 Sample…

Q: You want to estimate the mean weight of quarters in circulation. A sample of 50 quarters has a mean…

A: According to the given information in this question We need to construct 95% confidence interval

Q: If the sample mean is 37.7 and population standard deviation is = 9.2 and the sample size is 100…

A: Provided that the sample mean x¯=37.7 and the population standard deviation σ=9.2. The sample size…

Q: Use the sample results to approximate the margin of error and​ 95% confidence interval.   Sample…

A: Given data: Sample size, n = 64 Sample mean, x¯=69 Sample standard deviation, s=7 The degree of…

Q: On the Stanford-Binet test, the mean IQ is 100. A class of 21 kindergarten pupils were tested with a…

A: Given  population mean μ=100, n=sample size=21, sample mean x̄=92, sample standard deviations s=6.92…

Q: What is the minimum required sample size to make a 96% confidence interval for a population mean if…

A: Margin of error=E=2 Standard deviation=σ=12 96% confidence interval  E=Zc×σ/√n n=sample size

Q: A sample size of 100 from a population having a standard deviation =8 produced a mean of 40. The 99%…

A: Obtain the 99% confidence interval for the population mean. The 99% confidence interval for the…