Question
a and b
c and d
Test: POST UNIT 6 TEST Ch. 9 Submt Tes This Question: 1 pt 11 of 13(1 complete) This Test: 13 pts possible Question Hap wants to delesrmine how much time nabonally people spend eating and drinking. Suppose for a random sample of 1048 people age 15 or older the mean amount of tme spent eating ar drinking per day is 1.14 hours with a standard deviation of 0.57 hour. Complete parts (a) through (d) below (a) A histogram of sme spent eating and drinkng each day is skewed right. Use tis resultl to explain wihy a large sample size is needed to construct a confidence interval for the mean time spent eatng and dinking each day A· Strce the distrbuton of tme spert eatng and dnnkng each day is normaly disttuted the sample must be ange so tat tn dsmbnon orto sample mean wl be approximanely normai O B. The distribution of the sample mean will atways be approximately normal O C. The dsribution of the sample mean will never be approimately normal O D. Since te distreuton of tme spent eelrg trk ng each day is not normaly derbuied Iskewed right), te sample must be large so t at the distribuion of the sample mean will be approoomately normal (bl In 2010, there were aver 200 million people nationaly age 15 or older Expiain wey this, along with the facdt that the data were obtained using a andom sample, sadsfhes the requrements for corsttucing a confidence interval A. The sample sze greener than 10% of the popdat on. OB The sample sre is less than 5% of the populason O C. The sample size i8 gealer hon 5% of the poputton 0 D. The sample size s less than 10% of tG populaton
Explanation / Answer
a) Correct Answre: Option (A)
b) Correct Answre: Option (B)
C) Correct answer: Option (A)
90% Confident the population mean is within the range: 1.111013 < mean <1.168987
D) Correct answer: Option (B)
