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Which of the following methods could lead to stronger evidence for the outcome of a nonparametric test?
a) ensure that the distributions are normal
b) take multistage random samples
c) ensure that the populations have equal variances
d) increase sample size substantially
Calculate a 95% confidence interval for the mean endowment of all the private colleges in the United States assuming a normal distribution for the endowments.
A metropolitan school system consists of three school districts-norths, south, central. The north district contains 25% of all students, the south district contains 40%, and the central district contains 35%.
Assume if random samples of size n = 9 are selected can we say anything about the distribution of sample means.
Jim's average delivery time was 38 minutes whereas Alison's average delivery time was 40 minutes. The respective standard deviations were 5 minutes and 4 minutes.
Given the following data on hotel check-ins for a 6-month period:
Suppose Abraham Lincoln had answered a survey questionnaire in which he indicated that he had not received a grade school diploma. The researcher found that Lincoln's educational score did not correlate with the expected variables. What was wrong?
A sample of 25 concession stand purchases at the October 22 matinee of Bride of Chucky showed a mean purchase of $5.29 with a standard deviation of$3.02.
Display the data in scatter plot. Calculate the linear correlation coefficient. Use the scatterplot to make a conclusion about the type of correlation.
Consider the relationship between derived scores and the normal curve. In terms of the normal curve and how it relates to psychological testing and assessment.
If you draw two balls without replacing the first one, what is the possibility that one ball is red and the other is white.
What is an example of data that can be transformed from one level of measurement to another, and another example of data that cannot be transformed?
A communication network transmits binary digits, 0 to 1, where each digit is transmitted 10 times in succession. During each transmission, there is a 0.995 probability of accurate transmission.
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