OP /Student PlayerTe aspx testid 57692740 O Onelogin B Unit 6 Estimating values
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OP /Student PlayerTe aspx testid 57692740 O Onelogin B Unit 6 Estimating values Using eP Take a Test-Leexiong x C In A Trial or 177 Patients Who C search Tetbook Solutionsl 3 Rounding Numbers Calculator Ich ING How to Take Screenshots in Wi dvorites. Lee Kiong 4'15/17 2:27 PM MAT 220.3 Statistics IDMoD4 ONLINE (36 3Di1701 Test: POST UNIT 6 TEST Ch. 9 Submit Tesl This Question 1 pt This Test: 8 pts possible 5 of 8 (1 complete) Question Help Anutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 1092 people age 15 or older, the mean amount of time spent eating or drinking per day is 1.79 hours with a standard deviation of 0.73 hour. Complete pa (a) through (d) below. (a) A histogram of time spent Rating and drinking Bach day is skeered right. Use this result to explain why a large sample size is needed to construct a confidence interval for the mean time spent eating and drinking each day O A. The distribution of the sample mean wil never be approximately normal. O B. The distribution of the sample mean will always be approximately normal O Since the distribution of time spent eating and drinking each day is not normally distributed (skewed right), the sample must be large so that the distribution of the sample mean wil be approximately normal. O D. Since the distribution of time spent eating and drinking each day is normally distributed, the sample must be large so that the distribution of the sam mean will be approximately normal. Ib) In 2010, there were over 200 million people nalionally age 15 or alder. Explain why this alang with the fact that the data were obtained using a random sample, satisfies the requiremenis for constructing a confidence interval. O A. The sample size is greater than 5% of the population. O B. The sample size is greater than 10% of the population. The sample size is less than of the population. O D. The sample size is less than 5% of the population (c) Determine and interpret a 95% confidence interval for the mean amount of time Armericans age 15 or older spend eating and drinking each day. Select th rrect chai below and fill pplicable, your cho Type integers or dacimals rounded to thre8 decimal places as nBeded. Use ascending order.) O A. There is a 95% probability that the mean amount of time spent eating or drinking per day is between and hours. o B. The nutritionist is 95% co that the mean amount of time spent eating or drinking per day is between and hours. nfident O The nutritionist is 95% confident that the amount of time spent eating or drinking per day for any individual is between and hours. Click to select your answer 100% :27 AM & e e 4/15/201Explanation / Answer
a) option C) is correct
b) population size is at least 20 times larger than the sample size
hence option D) is correct
c)sample mean = 1.73 , s = 0.79 ,n = 1092
z0.025 = 1.96
hence confidence interval
is (1.73-1.96*0.79/sqrt(1092) , 1.73+1.96*0.79/sqrt(1092))
=(1.68314328,1.77685672)
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