According to a recent article about individuals who have credit cards, he mean number of cards per person with credit cards is 4.5. To test this result a random survey of 60 individuals who have credit cards was conducted. The survey only includes the number of credit cards per participant. The results of the survey are attached below (a) What is the variabie of interest in is study? is it qualitative or quantitative? (b) Do the results of the survey imply that the mean number of cards per individual is less than 457 Use he a0.05 level of signiticance. m Click the icon to view the data from the survey (a) What is the variatie of interest in is study? is it qualitative or quantitative? The variable of interest is number of credit cardsisa quantitative variable (b) Do the results of the survey imply that the mean number of cards per individual is less than 457 Use the a0.05 level of signitcance. State the null and ahermative hypotheses. (Type integers or decimals.)

If we have a data set containing the age and marital status of large group of individuals and we ask the question "is there a mean difference in Age between Those who are married and not married in the larger population of those who took part of the GSS survey? "   What would the null and alternative hypothesis be?

One personality test available on the World Wide Web has a subsection designed to assess the "honesty" of the test-taker. After taking the test and seeing your score for this subsection, you're interested in the mean score u among the general population on this subsection. The website reports that µ is 140, but you believe is less than 140. To do a statistical test, you choose a random sample of 150 people and have them that take the personality test. Suppose that the population of scores on the subsection of the personality test has a standard deviation of 20 and that you perform your hypothesis test using the 0.01 level of significance. Based on this information, answer the questions below. Carry your intermediate computations to at least four decimal places, and round your responses as indicated. (If necessary, consult a list of formulas.) H. : u is What are the null and alternative hypotheses that you should use for the test? Η, : μ is What is the probability that you commit a Type…

A researcher is interested in examining the relationship between assertiveness and level of stress in college students. She believes that college students who are more assertive experience less stress than students who less assertive. She surveys a random sample of college students and asks them to complete a questionnaire in which they rate their level of assertiveness and level of stress on a 5-point scale. Answer the following questions: 1) What are the scales of measurement for level of stress and assertiveness? 2) Which inferential statistics should be used to solve this complex research problem? 3) Describe your decision making process related to answering question two.