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Hypothesis Testing:
The director of admissions at the University of Maryland, University College is concerned about the high cost of textbooks for the students each semester. A sample of 25 students enrolled in the university indicates that X (bar) = $315.4 and s = $43.20.
The following table shows the number of miles driven in each trial.
Illustrate by computation that, for straight -line regression of Y on x, β1= 0.
Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention.
Perform a chi-square test on the following data:
The following frequency distribution was obtained. The data values are in hours. Construct a histogram for the data .
Run an ANOVA using only groups 1 to 6 (You can hide group 7 from the analysis by data followed by select cases and then you filter out group 7 by if GROUP~= ). Also run the posthoc tests LSD and Bonferroni.
Test the claim that for the adult population of one town, the mean annual salary is given by μ = $30,000.
A 95% confidence interval for the proportion of all adults who bought a lottery ticket in the past year is (assume Gallup used an SRS)
What IQ score should one have in order to be eligible for Mensa?
At the .01 significance level, is there a relationship between job pressure and age?
what percent of the total number of seeds germinated?
If the standard deviation is $89.46, find the probability that a randomly selected customer spends between $550.67 and $836.94.
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