Ch 9 Review Assignment: Choosing the Correct Two Sample Test For each situation
ID: 2949658 • Letter: C
Question
Ch 9 Review Assignment: Choosing the Correct Two Sample Test For each situation described below, write the hypotheses. Then indicate which test you would choose on the graphing calculator: 2-T-PropZ-test, T-test (on the paired differences), 2-Sample T-test (nonpooled). (You don't need to carry out the test) 1. Is it true that the length of a person's forearm is the same as the length of his/her foot? To test this 10 randomly selected college students measured their forearms (wrist to elbow) and then measured the length of their right foot. The measurements in centimeters) are given in the table below. Forearm, | 23.75 | 23.5 | 28.5 | 26 26 25.5 26.5 26 25.5 Foot, Y 23,5 2329 22 26 245 26 25 25 24 Hypotheses: Ho: MX - Ju 2sample tesi (non fo Calculator Test: 2. Two different processes (Type 1 and Type 2) are used to produce metal plates. The table below shows the weights (in grams) of randomly selected samples produced by each process. Is there evidence that the average weight of plates produced by process Type 2 is less than that of process Type 1? Type 1 105 Type 2 90 106 94 108 106 86 84 107 106 120 110 98 Hypotheses: Ao Calculator Test: 3. A clerk in a certain county wanted to find out whether mailing registration reminders to residents eligible to vote would improve voter registration rates. In that county, there were 1224 residents eligible to vote. These residents were randomly divided into two groups of 612. Group 1 residents received no reminders to register. Out if this group, 280 registered to vote. Residents in Group 2 received voting registration reminders in the mail. Out of this group, 336 registered to vote. Is there evidence that the proportion of residents who registered to vote was higher in Group 2? Ho: Hypotheses: o Calculator Test:Paleed T testExplanation / Answer
#1.
Hypothesis:
H0: mux - muy = 0
Ha: mux - muy not equals to 0
Calculator Test: T-test (on the paired differences)
#2.
Hypothesis:
H0: mu1 = mu2
Ha: mu1 > mu2
Calculator Test: 2-Sample T-test (nonpooled)
#3.
Hypothesis:
H0: p1 = p2
Ha: p1 < p2
Calculator Test: 2 Proportion Z-Test