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- 12-20 8 21-29 7 30-38 3 39-47 5 48-56 0 57-65 0 66-74 1 Class size = 6 Class Interval = 9 Find the mean. Find the standard deviation. Find the coefficient of variation.The sample variance s2 is an unbiased estimator of the population variance o² when the denominator of s² is a.n Ob.n+1 C. n-1 d. √n-1 Please give solution in correct and step by step detailed format thanku Don't give solution in image formatQ22
- If you have a consistent estimator, what will happen as you increase the sample size? (A The variance gets smaller. B The value of the estimator is equal to the value of the parameter. The value of the estimator approaches the value of the parameter. D The standard deviation approaches zero.Qs Afln a particular workshop it s found that about 85% of the production in 2020 are success. Find the mean, variance and standard deviation for the number of success days during (90 days only of the year).K You want to buy a washing machine, and a salesperson tells you that the mean repair costs for Model A and Model B are equal. You research the repair costs. The mean repair cost of 25 Model A washing machines is $212. Assume the population standard deviation is $20. The mean repair cost of 27 Model B washing machines is $228. Assume the population standard deviation is $21. At a=0.01, can you reject the salesperson's claim? Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) through (e). (a) Identify the claim and state Ho and Ha What is the claim? OA. The mean repair costs for Model A and Model B are equal. OB. The mean repair cost for Model A is less than Model B. OC. The mean repair costs for Model A and Model B are different. OD. The mean repair cost for Model A is greater than Model B. Let u₁ be the mean repair cost for Model A and let ₂ be the mean repair cost for Model B. What are Ho and H₂? OA. Ho: H1 H2 Ha H₁242 OD.…
- I Find the variance and standard deviation. Show your solution. 1. 1 2 3 4 P(x) 0.09 0.19 039 0.22 0.11 2. 1 2 3 4 P(x) 0.11 0.22 033 0.44 0.55Complete the given table below by writing directly the needed data. Show complete solution in solving the Mean, Variance and Standard Deviation.This data is from a sample. Calculate the mean, standard deviation, and variance. Suggestion: use technology. Round answers to two decimal places. x 15.2 18.2 10.7 21.9 46.8 49.4 36.8 42.1 Mean = Standard Deviation = Variance = Ooops - now you discover that the data was actually from a population! So now you must give the population standard deviation.Population Standard Deviation =
