2. Carlos wants to replicate a study where the highest lowest observed value is 13.8 while the lowest is 13.4. He wants to estimate the population mean μ to the margin of error of 0.025 of its true value. Using 99% confidence level, find the sample size n that he needs.

Q: A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A: It is given that confidence level is 0.99, standard deviation is 11.3 and margin of error E is 4.

Q: In the one-sample case, you are comparing the statistic from a sample to a known population…

A: Since we are testing for mean of two different population so it is two tailed test

Q: tudies if age correlates with the average number of hours of sleep, so she selected a random sample…

A: Given: sample size(n)=10   Age(x) Hours of sleep(y) xy x^2 y^2   8 8 64 64 64   15 8 120 225…

Q: Assume you select an SRS of size 94 and give them a test. You calculate the mean test score in your…

A:

Q: A sampling distribution of means for samples of students taking the SAT exam has a population mean…

A: It is given that the sampling distribution has a population mean 500 and standard error 200.

Q: Please also explain why you determined whether or not the results are statistically significant.…

A: Given information isn1=40n2=40s1=0.50

Q: Suppose we are interested to construct a confidence interval at 95% confidence level of the mean…

A: The provided information is  α=0.05 The critical value is  zc=1.96  (from standard normal table) The…

Q: find the margin of error for a sample mean, given n=16, s=4, Xbar=17. for a 95% confidence interval.

A: The margin of error for sample mean is given by,

Q: As the sample size increases, what happens to the p-value associated with a given sample mean?

A: In statistics, the sample size is the no of units present in a sample that is drawn from a…

Q: the claim is that for a smartphone carriers data speeds at airports, the mean is 14.00Mbps. the…

A:

Q: The time married men with children spend on child care averages 6.5 hours per week. You belong to a…

A: b) The sample mean: The sample mean is 7.13, obtained from the excel function, =AVERAGE(J1:J40).…

Q: In a random sample of nine people, the mean driving distance to work was 25 miles the sample…

A:

Q: If the size of a sample is 64 and standard error of mean is 1.5.What should be the sample if…

A:

Q: sample of 40 observations is selected from a normal population where the population variance is 625.…

A: According to the given information in this questionThere are more than three subparts according to…

Q: You collect a sample of 69 observations of animal heights, in mm. The sample mean is 41.89 and the…

A: Given: x¯=41.89s=4.33n=69 The degrees of freedom is obtained as below: df=n-1=69-1=68 The critical…

Q: Suppose you wanted to take another sample of dogs to find a 90% confidence interval of young dogs to…

A:

Q: One sample has n = 5 scores and M = 10. A second sample has n = 20 scores and M = 5. If the two…

A:

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 researcher wants to make a ninety-five percent confidence interval for the population mean. She…

A: From the given information,Margin of error , E = 0.56 Population variance, 7.6 Using formula ,

Q: 2. How is the sample size related to the deviation?

A: We have to define how sample size is related standard deviation

Q: A population has a mean of 50, SD of 30. We have a sample with a mean of -10, sample size is 9. Does…

A: Denote μ as the population mean.

Q: You take a sample of size 190 and get 23 successes. Confirm that the sample size was large enough to…

A: Given that Sample size (n) = 190  probability of success (p) = 23/190 = 0.12

Q: If the sample mean is 70 and the standard error of the sample mean is 8, what will be the 90%…

A:

Q: The claim is that for a smartphone​ carrier's data speeds at​ airports, the mean is m=12.00 Mbps.…

A:

Q: Assume that a sample is being used to estimate a population mean μμ. If n = 29, x¯ = 46, and s =…

A: From the provided information, Sample size (n) = 29 Sample mean (x̅) = 46 Sample standard deviation…

Q: If X=72​, σ=13​, and n=66​, construct a 95​% confidence interval estimate of the population​…

A:

Q: Assume that you took a sample and calculated the sample mean as 100.you then calculated the lower…

A:

Q: Find the level of a two-sided confidence interval for t = 2.776 with sample size 5. Express the…

A: According to the provided information, sample size (n) = 5 The degrees of freedom is: df =n-1 = 5-1…

Q: 2. The principal of a large senior high school wants to estimate the average age of grade 11…

A: Given Sample mean x̄=17.4, sample size=n=50, population standard deviations σ=2  Construct 95% CI…

Q: If the sample mean is 70 and the standard error of the sample mean is 8, what will be the 90%…

A:

Q: The 95% confidence interval of the variance of a population is computed as (12.367,21.761).…

A: Given information: The 95% confidence interval for the variance of a population is (12.367, 21.761).…

Q: To get an unbiased sample variance, we divide by instead of which would give us a estimate of the…

A: Introduction The variance is a measure of dispersion.

Q: A simple random sample of 1000 observations is taken from a population of 10,000. What is the…

A: