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The point of averages of a scatterplot of Y against X is (14, 1 ). The SD of X is 6, and the SD of Y is 7. The decimal fraction of points in the scatterplot whose X coordinates are between -4 and 32 and whose Y coordinates are between -34 and 36 is at least (Hint: Use Chebychev's inequality twice.)
Do motivation levels between Japanese and American managers differ? A randomly selected group of each were administered the Sarnoff Survey of Attitudes Toward Life (SSATL), which measures motivation for upward mobility. The SSATL scores are summar..
Create probability tree showing all marginal, conditional, and joint probabilities. Create a joint probability table.
Is there an alternative test to the chi squared test? What if my results give an expected frequency below 5, which stats book states that these should be treated with caution?
Using the 0.01 level of significance, is there evidence that the mean shopping time at the supermarket is different from the claimed value of 22 minutes?
Use the given contingency table to (a) find the expected frequencies of each cell in the table, (b) perform a chi-square test for independence, and (c) comment on the relationship between the two variables.
When 186 homes in Hyde Park, NY were tested for radon, 30 were found to have levels above the maximum safety level. What is the percentage of the Hyde Park homes above the maximum safe level of radon?
A simple random sample of front-seat occupants involved in car crashes is obtained. Among 2823 occupants not wearing seat belts, 31 were killed. Among 7765 occupants wearing seat belts, 16 were killed.
You've been recently hired as a marketing analyst in an advertising agency. You are assigned the task of assessing the impact of direct marketing promotions.
The Bureau of the Census reports that the average commuting time for citizens of both Baltimore, Maryland, and Miami, Florida is approximately 29 minutes (uMiami=29 and uBaltimore=29 minutes).
Data were collected for a sample of 64 customers. Assume a population standard deviation of $6. At 95% confidence, what is the margin of error?
Discuss possible study designs. Which of the designs would we use to test our research hypothesis?
You observe the gender of the next 950 babies born at a local hospital. The random variable represents tha number of girls. historically , 49.8% of the babies born are girls?
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