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The FICO credit rating scores obtained in a simple random sample are listed below. As writing, the reported mean FICO score was 678. Do these sample FICO scores appear to be consistent with the reported mean?
714 751 664 789 818 779 698 836 753 834 693 802
CPI and Subway Fare Find the best predicted cost of subway fare when the consumer Price Index (CPI) is 182.5 (in the year 2000).
Use these data to obtain a 90% confidence interval estimate for the mean starting monthly salary, µ, of all recent graduates with bachelor's degrees in marketing from this university.
For what proportion of patients will drug be effective for between 2 and 2.25 hours?
The same chance of being selected as does any other group. What is the probability that at least one of the shifts will be unrepresented in the sample of workers?
Agricultural researchers are studying three different ways of planting peanuts to determine whether significantly different levels of production yield will result.
For a sample of 36 students in a class the mean score in Mathematics is 72 with a standard deviation of 7. Find the 95% confidence interval for the mean score.
a sample of size 200 from population 1 has 50 successes. a sample of size 200 from population 2 has 40 successes. what
The personnel director of Cander Machine Products is investigating perfectionism on the job. A test designed to measure perfectionism was administered to a random sample of 18 employees.
Compute the effect size with gender as the grouping variable and ADDSC as the dependent variable.
At Ajax Spring Water, a half-liter bottle of soft drink is supposed to contain a mean of 520 ml. The filling process follows a normal distribution with a known process standard deviation of 4 ml.
Exchange ("the big board") and five stocks listed on NASDAQ. At the .10 significance level, can we conclude that the annual rates of return are higher on the big board?
According to the Bureau of Economic Analysis, the savings rate of American households, defined as a percentage of the disposable personal income, was 4.20% in 2009.
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