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A statistical study reported that the drug was effective with the p-value of .042.
(a) Is this true? The effective sample may be found about 42 times in 1000 samples.
(b) Is drug effective at alpha = 0.05?
(c) Would the drug that has the p-value of .087 be more effective?
What is the role of probability concepts in business decision making? Define probability concepts.
Using the original data, test at the 5% significance level that the population standard deviation of studying times is greater than 4 hours.
Mr. Connors philosophy class has 99 students, classified by academic year and gender, as illustrated in the table below. Mr. Connor randomly chooses one student to collect yesterday's work. What is the probability that he selects a male, given tha..
Which of the given properties doesn't apply to theoretical normal distribution?
Can we conclude that there is a positive association between the size of the home and the selling price? Use the .05 significance level.
Find a 95% confidence interval for the mean amount of money µ spent at the waiter's tables.
Could this information be viewed as representing the ratio scale of measurement? If so , explain why. If not, why not.
Can you determine the number of levels used for each factor? Explain. Describe a treatment for this experiment and determine the number of treatments used.
Compare and contrast internal and external validity. Describe and give examples of research questions for which external validity is a primary concern.
Jim Sellers is thinking about producing a new type of electric razor for men. If the market were favorable, he would get a return of $100,000, but if the market for this new type of razor were unfavorable
Plot fitted values against residuals. Does this plot point out any problems with homoscedasticity?
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?
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