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Assume that the mean score on a normally distributed statistics quiz taken by 400 psychology students was 76, and the standard deviation was 8. Ben had a z-score of -1.2.
If someone gave a passing grade only to the top 25% of the class, what is the lowest score that would be considered passing?
What scores cutoff the middle 40% of grades?
Lowest grade:
Highest grade:
What proportion of students scored outside of the area between scores 66 and 86?
For this project, you will begin by analyzing and researching the Motivation in the Workplace Case Study. You will then apply at least two relevant content and process theories from this course in making your analysis and evaluation of the real-wo..
an economic theory is that the money flowing in and out of mutual funds fund flows is related to the performance of
Did you find any outliers on the dependent variables that were due to errors of coding? If so, what and why? How would you correct an error of coding?
Translate the following arguments into symbolic form.- If a superconducting particle collider is built, then the data yielded will benefit scientists of all nations and it deserves international funding.
Find the probability that in a sample of 10 tools chosen at random exactly 2 will be defective by using (a) the binomial distribution and (b) the Poisson approximation to the binomial distribution.
Given your answer in part (a), which of these two alternative headlines do you think would be preferable: "Breast-feeding leads to better school performance" or "Link found between breast-feeding and school performance"? Explain.
1. Develop the correlation matrix showing the correlation between all possible pairs of variables. Test statistically to determine which independent variables are significantly correlated with the dependent variable, book sales. Use a significance..
a survey of an urban university population of 25450 showed that 870 of 1100 students sampled supported a fee increase
a. What is the matched-pairs odds ratio for these data? b. Now unmatch the pairs and calculate an unmatched odds ratio.
Repeat the calculations in part b for samples of size 5 and 2. What effect does a change in the sample size appear to have on the dispersion of the sampling errors?
A report states that 46% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 3% with 96% confidence?
find the contribution margin per haircut. with the barbers compensation at a fixed cost what are the totals?find the
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