Manager of a grocery store wants to determine if consumers are spending more than the national average. The ni
verage is $150.00 with a standard deviation of $30.20. The manager collects 40 random receipts and finds that the
$160. Complete a hypothesis test with a significance level of 2.5% to determine if the average customer spends n
ore than the national average. Which of the following is a valid conclusion for the manager based on this test?
The customers spend more than the national average in his store
The manager should decrease prices in his store.
The customers do not spend more than the national average in his store.
The customers in his store just come from a rich neighborhood.

One of the great societal changes brought about by industrialization in europe was a. slavery. b. urbanization. c. ruralization. d. democracy.

Psychologists studying infant memory want to determine at what age babies can remember specific events. an experimenter uses several puppets to demonstrate a series of actions while the infant watches. after a delay, the experimenter records how many of the actions the child imitates when playing with the puppets. what is the dependent variable?

Asociologist wants to study a culture that occurs in some women’s prisons: “state families,” in which individual prisoners take on certain roles within a group of like-minded prisoners. there is previous evidence that younger prisoners will use older inmates who play the roles of grandparents as a resource before they will turn to staff for and advice. the lieutenant in charge of a dorm of long-term prisoners offers to gather volunteers to speak to the researcher and also offers to vouch for the integrity of the researcher. the use of this staff is: a valid use of a statistical technique referred to “snowball sampling” wherein the inclusion of the first subject leads to the recruitment of another one subject.a useful tactic in obtaining a sample of prisoners who both meet the criteria and who will be honest with the researcher.wrong and is prohibited; subject selection needs to be free from intervention by prison authorities or prisoners.acceptable only when the researcher’s irb grants a special waiver.