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Which of the following is not an advantage of using a cluster sample instead of other types of samples?
a. it can reduce cost
b. it is convenient to use
c. it can simplify field work
d. the groups of people tend to be more homogeneous
When performing a chi-square test for independence, explain how the "cell frequencies under the independence assumption" are calculated.
Determine the probability in big class that both sections are covered? Only one section? Neither section? Determine the expected number of sections covered?
Form the column of differences and find the mean and standard deviation of this column of numbers.
What is the appropriate set of hypotheses to test such that a possible outcome of the test would indicate;
Using variables below, (1) mention all research questions that would be replied with a Two Way ANOVA test, (2) make null hypotheses for these questions.
The estimated salary range is $4,500, the margin of error should be $100 and the desired level of confidence is 95%.
Determine a 90% confidence interval for the mean weight of all university male first-year students.
Compute the probability that randomly chosen student with a Master's degree majored in English or mathematics?
At 0.01 level of significance, is there evidence that mean price is higher at Whole Foods Market than at Fairyway supermarket? Interpret the meaning of p-value in (i).
You have to determine that your cutoff value at level a = 0.05 is 1.645 when testing whether the mean of a population is significantly different from 1.5. If you calculate a test statistic of 1.8 what is the proper conclusion?
Scores on a test have a mean of 73 and Q3 is 81. The scores have a distribution that is approximately normal. Find P90.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
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