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In July 1991 and again in April 2001, the Gallup Poll asked random samples of 1015 adults about their opinions on working parents. The table on the next page summarizes responses to the question Considering the needs of both parents and children, which of the following do you see as the ideal family in today s society?
a) Is this a survey, a retrospective study, a prospective study, or an experiment? Explain.
b) Will you test goodness-of-fit, homogeneity, or independence?
c) Based on these results, do you think there was a change in people's attitudes during the 10 years between these polls?
1. in the following examples indicate whether you would perform a t test of independent means or dependent
A researcher conducted a study in which children with problems learning mathematics were offered the opportunity to purchase time with special tutors.- List three problems with that interpretation and explain why each is a problem.
What are the independent variables and their levels? What is the dependent variable? State all null hypotheses associated with independent variables and their interaction? Also suggest alternate hypotheses
two different sprays for rewaterproofing parkas are compared by treating 5 parkas with spray 1 and 6 with spray 2.
The store manager is under impression that his sales people do more business if they score higher on the social skills test which was administered this year. 5 victims were selected at random. Below, the results are X =test score, Y =weekly sales ..
in 2000 as reported by act research service the mean act math score was 20.7. if act math scores are normally
For each of the following three cases, explain (i) the hypotheses with a plausible definition of p1 and p2, (ii) whether or not the data indicate practical significance (use common sense and/or general knowledge), and (iii) whether or not the data..
c. Calculate the mean of the 100 estimates of b1' Does it appear that hi is an unbiased destination of ß1 despite the presence of positive autocorrelation?
for each of the following decide whether you would compute the number of possible outcomes with a permutation order
Area to right of mean of normal probability distribution is?
A certain statistics instructor participates in triathlons. The accompanying table lists times (in minutes and seconds) he recorded while riding a bicycle for five laps through each mile of a 3-mile loop. Does one of the miles appear to have a hill
What other information would you like to know to answer the question about salary equity between the genders? Why?
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