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A question has these possible choices - excellent, very good, good, fair, and unsatisfactory. How many degrees of freedom are there using the goodness-of-fit test to the sample results?
The times needed to fall asleep are assumed to follow a normal distribution. The results for the two nights for the ten volunteers are shown below:
Eighty-eight shoppers were interviewed at random, and 59 said that they prefer to shop alone. What is the value of q-hat?
Construct a 95% confidence interval for the average amount its credit card customers spent on their first visit to the chain's new store in the mall assuming that the amount spent follows a normal distribution.
Develop a p chart with 3-sigma control limits and evaluate whether the process is in statistical control
Pretest-posttest design and internal validity threats - please discuss all threats to internal validity.
Would Kruskal-Wallis be the suitable statistical procedure to test this Research Question (RQ)? Describe your answer. When would you use Chi-Square test rather than One-Way Anova?
Find out the decision strategy company must follow, expected value of strategy, and maximum amount the company must pay market research firm for survey results.
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
Is there a relationship between sales and newspaper advertising? Support your answer?
How large random sample of potential voters will be required to evaluate result with 95% confidence and with margin of error of plus and minus 3%?
Test hypothesis that Site B is more successful in initiating acquaintances than Site A. Use alpha = .05.
Note down a research that requires a decision making with probabilities.
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