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Use a t-test to investigate the claim and assume that the population is normally distributed:
A large university says the mean number of classroom hours per week for full-time faculty is more than 9. A random sample of the number of classroom hours for full-time faculty for one week is listed. At ? = 0.05, test the university's claim.
10.7 9.8 11.6 9.7 7.6 11.3 14.1 8.1
In a sample of 60 mice, a biologist found that 46% were able to run a maze in 30 seconds or less. Find the 99% limit for the population proportion of mice who can run that maze in 30 seconds or less?
It is estimated that 10 percent of those taking the quantitative methods portion of the CPA examination fail that section. Sixty students are taking the exam on Saturday.
The main goal of correlation research is ______________
A researcher plans a study in which a crucial step is offering participants a food reward. It is important that the three food rewards be equal in appeal.
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
A mathematical placement test is given to all entering freshmen at a small college. A student who receives grades below 35 is denied admission to the regular mathematics course and placed in a remedial class.
A major benefit of two-way ANOVA over several one-way ANOVAs, If an F test for interaction is significant.
Her results (in hours until turning a particular shade of brown) are in the table below. At ∞= .01, did she see a difference between the two treatments?
The following are quality control data for a manufacturing process at Kensport Chemical Company. The data show the temperature in degrees centigrade at five point in time during a manufacturing cycle.
Write the linear regression equation to forecast father's education from mother's education?
A box of 9 gloves contains two left handed gloves and seven right handed gloves. If two gloves are randomly selected from the box, without replacement, what is the probability that both gloves will be right handed?
Find the least squares regression line by deciding which are the appropriate independent and dependent variables and calculating the equation of the line. State equation of line.
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