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Question: After conducting market research we have found that the possibility of a customer in the top 5 per cent group switching to a competitor is 0.85 if we do not offer a price discount and 0.15 if we do. Consider how you could use this information to determine the appropriate level of the price rebate to be offered.
scores on the mathematic section of the sat reasoning test form a normal distribution with a mean of u 500 and a
Draw the suitable distribution, and locate critical regions for α = .05. Compute test statistics (z score) for the sample.
Dr Zak developed a test to measure depression. He sampled 100 university students to take his five item test. The group of students was comprised of 30 men and 70 women. In this group four persons were African American, six persons were Hispanic and ..
a national study has determined that people who work full time average 43.4 hours worked per week. assume that the
Does the histogram indicate normality for the data distribution? Explain - does the normal quantile plot indicate normality for the data distribution? Explain.
Suppose a random sample of n = 15 observations is selected from a population that has normal distribution with mean 50 and standard deviation 10.
explain why we use the notation p lt .05 in the formal test of the hypothesis when there is a significant difference
Suppose we would like to test the hypothesis that at least 10% of students suffer from allergies. We collect a random sample of 225 students and 21 of them suffer from allergies. State the null and alternative hypotheses. Obtain a test statistic a..
customers arrive at a checkout counter in a department store according to a poisson distribution at an average of
1. Determine whether a linear regression model is appropriate. 2. Calculate b1 and b0. What is the sample regression equation? 3. Find the predicted value of y if x is 10, 15, and 20.
All observers are successful; the search time for each is given in the table in minutes. Decide on a one- or two-tailed test, analyze the data, and write a conclusion.
Evette has 41 1/2ft. of string. She wants to cut it into pieces 3 3/4ft. long. How many pieces of string will she have? how much string remains, if any?
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