.11 Verizon? 10:16 AM Done ? According to the Central unit Theorem, the mean of
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.11 Verizon? 10:16 AM Done ? According to the Central unit Theorem, the mean of the sampling distribution of sample means, ? has a mean equal to the: a. sample mean e sample standard deviation d. population standard deviation 7. Apoint estimate is defined as a. the average of the sample values b. the average of the population values c a single value that is the best estimate of an unknown sample statistic d. a single value that is the best estimate of an unknown population parameter When the sample size decreases, the confidence interval will become b. wider . When the margin of ereor is increased, the confidence interval will become it cannot be determined 10. When theconfidence level is decreased(Lechanged from 95% to 80%. the confidence interval _ b. wider Part Ill. Chapter 6 11 Find the following areas. Draw a picture and shade the regions. You may box in your final answer or place it in the blank provided. Round your final anwer to 4 decimal places 13 points each a P(zExplanation / Answer
Ans:
6)Option b is correct(population mean)
7)Option a is correct(the average of the sample values i.e. sample mean)
8)When sample size decreases,standard error will increase,so margin of error will increase,hence confidence interval becomes wider.
Option b is correct(wider)
9)Confidence interval is gives as:
point estimate+/-margin of error
Hence,if margin of error increases,confidence interval becomes wider.
Option b is correct(wider)
10)When confidence level is decreased,critical z value decreases,so margin of error decreases,hence confidence interval become narrower.
Option a is correct(more narrow)
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