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Briefly discuss probability distributions. What is a normal distribution? Please provide a written example of how 'understanding distribution' can be an asset for any business project.
The 2009 National Assessment of Educational Progress (NAEP) gave a mathematics test to a random sample of eighth-graders in Texas. The mean score was 287 out of 500. To give a confidence interval for the mean score of all Texas eighth-graders, you..
Set up hypotheses to test if distribution of birthdays can be considered coming from uniform distribution.
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.
A monthly report to the Texas Department of Health, division of Water Hygiene, contained the following water production data in thousands of gallons:
The following table is based on information taken from the Medical Practice Characteristics section of the Statistical Abstract of the United States
Discuss possible study designs. Which of the designs would we use to test our research hypothesis?
A study 200 nurses found that of 125 females nurses, 56 had bachelor's degree; and of 75 male nurses; 34 had bachelor degrees. if a nurse is selected at random, find the probability that the nurse is a female nurse with a bachelor degree.
Determine the value of correlation coefficient between these 2 variables?
Suppose the population standard deviation is a=25. (The a is actually the funny looking 0 with the line that goes from the top right up at an angle) Compute the standard error of the mean
What is the probability that 0, 1, 2, or 3 hypertensives will be identi ed in such sibships if the hypertensive status of 2 siblings in the same family are independent events?
Test the overall significance of the regression model at α = .05 level. Please use the six-step hypothesis-testing framework we employed in class, and write out the last three steps in this table:
A marketing research analyst collects data for a random sample of 100 customers out of the 400 who purchased a particular "coupon special".
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