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Dr. Oberg and Dr. Zelinski are two of the world's leading researchers in the highly competitive field of feline intelligence. After many years, and several billions of dollars worth of research, each scientist has independently developed accurate tests of feline IQ. Robin and Fred are each convinced that their respective cats are the most intelligent. Robin has given her cat, Wally, Dr. Oberg's patented Felis Intelligentsia IQ test, which has a mean of 103 and a standard deviation of 4.1, and Wally has scored an impressive 112.
Fred, on the other hand, has opted to administer to his cat, Heisenberg, Dr. Zelinski's Is Your Cat Smarter Than This Rock?
Heisenberg has attained a score of 87 on the illustrious IYCSTTR, which has a mean of 70 and a standard deviation of 5.6. Whose cat is smarter, and why?
The winning team's score in 13 high school basketball games was recorded. If the sample mean is 54.3 points and the sample standard deviation is 11.0 points, find the 98% confidence interval of the true mean.
Company W is testing a sales software. Their salesforce of 500 people is divided into four regions: Northeast, Southeast, Central and West. Each sales person is expected to sell the same amount of products.
What is the probability that a randomly selected group of 50 shoppers will spend a total of more than $5700? The total will be more than $5700 when the sample average exceeds what value?
How do you solve the inequality (x + 1)(x - 6)
A real estate agent in the coastal area of Georgia wants to compare the variation in the selling price of homes on the oceanfront with those one to three blocks from the ocean.
A recent survey by alumni of a major university indicated that average salary of 8000 of its 250,000 graduates was $120,000. Does this signify population parameter or sample statistic?
Do the confidence interval limits contain 98.6F? What does the sample suggest about the use of 98.6F as the mean body temp.
Find the test statistic, p-value and critical value and state a final conclusion. Sample data: n=40, mean of the values in a sample = 117, assume that the standard deviation = 14 and the significance level = 0.05
A manufacturer of automobile transmissions uses three different processes. The management ordered a study of the production costs to see if there is a difference among the three processes. A summary of the findings is shown below.
You may assume the sample data comes from a population that follows a normal distribution. Using a .05 level of significance test the company's claim.
Following are different algebraic expressions of the production function. Decide whether each one has constant, increasing, or decreasing returns to scale.
Compare value of test statistics F obtained in part(2) with value of t 2 , square of test statistic for testing H 0 : β 1 =0 that was needed in test null hypothesis that true slope is 0. Interpret the results of this test.
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