Question

Question 6 2.29/4 pts A study is conducted in which a random sample of adults are divided equally into two groups and given a list of words to memorize. During a break, one group takes a minute nap while another group is given a caffeine pill. The response variable of interest is the number of words participants are able to recall following the break. We are testing to see if there is a difference in the average number of words a person can recall depending on whether the person slept or ingested caffeine. The data1 are shown in Table 1 below. Sleep 14 18 11 13 18 17 219 16 17 14 15 Mcan 15.25 Caffeine 12 12 14 136 18 14 16 10 7 5 Mean-12.25 1) The study is Select] 2) The parameter of interest is Difference in proportions 3) The observed sample statistic is Sclect 4) Choose the correct Ho. Hs from options below Select ]

Answer 1

2)

the parameter of interest is difference in mean

3)

observed statistic = xbar1 -xbar2 = 15.25 - 12.25 = 3

4)

option D) is correct

5)

it will centered at 0

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