Homework: Homework - Chapter 7 Score: 0 of 1 pt 7.3.35 Save 15 of 19 (10 complet
ID: 2934795 • Letter: H
Question
Homework: Homework - Chapter 7 Score: 0 of 1 pt 7.3.35 Save 15 of 19 (10 complete) HW Score: 29.87%, 5.68 of 19 pts Question Help 145.31 lb. Research from other sources Using the simple random sample of weights of women from a data set, we obtain these sample statistics: n 40 and x suggests that the population of weights of women has a standard deviation given by = 30.11 lb. a. Find the best point estimate of the mean weight of all women b. Find a 99% confidence interval estimate of the mean weight of all women. Click here to viewatdistribution table. Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table a. The best point estimate is 145.31 lb Type an integer or a decimal.) b, The 99% confidence interval estimate is DbqsDb. (Round to two decimal places as needed.)Explanation / Answer
Ans:
a)Best point estimate=sample mean=145.31
b)z vale for 99% Confidence interval is +/-2.58
99% Confidence interval
=145.31+/-2.58*(30.11/sqrt(40))
=145.31+/-2.58*4.76
=145.31+/-12.28
=(133.03, 157.59)
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