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A manufacturer claims that fewer than 6% of its fax machines are defective. In a random sample of 97 such fax machines, 4% are defective. Find the P-value for a test of the manufacturer's claim.
What was the probability that a student worked a part time job or made the Dean's list. Interpret the results.
You can allow the cup to overfill 4% of the time. What amount should you set as the mean amount of coffee to be dispensed?
Critique the HR manager's planned approach and give him advice on how to proceed. You can assume that a reasonable estimate for the proportion of new hires that are happy with the company is .8.
Assume a very large normally distributed population of scores on a test with mean 77 and standard deviation 7.
Assume you are using ANOVA to study some phenomenon. There are three treatment levels and a total of 17 people in the study. Complete the following ANOVA table.
Assume that the measurements came from a normal distribution. The variability of the manufacturing process is unknown means the same as the standard deviation is unknown.
Suppose the regression equation that has been used to estimate the value of existing homes is as follows; Interpret the meaning of the slopes of this equation.
A lab test is 95% effective in detecting a disease. The test gives a false positive (reports the patient has disease when they do not) for 1 % of the healthy population tested.
"Give an example of a statistic that you have heard quoted in the media that you do not believe is accurate either due to bias or other incorrect statistical methods. Describe the relevant population and the source (e.g. newspaper, TV, radio, inte..
Based on a study of heights of men and women who do gymnastics, a researcher concludes that the exercise from playing gymnastics causes people to become shorter. Do you agree with this conclusion?
Find the probability that a standard normal random variable will assume a value between: Find a z such that 70% of the area is above that value.
At the .01 significance level, can we conclude that there is more variation in the selling prices of the oceanfront homes?
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