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In a sample of 80 executives officers (CEOs) in Atlanta only 12% had advanced college degrees. There are indication that nationally 16% of all CEOs had advanced college degrees. Use a 0.05 level of significance (? =.05) to determine whether or not the percentage of Atlanta CEOs who have advanced degrees is significantly less than the national percentage.
The following table contains t0 new sub- oups of thickness data. Plot this data on the control charts from (a) based on the new subgroup size. Is the process in statistical control?
A graphical presentation may accomplish ALL BUT which of the following objectives? Illustrate the amount of variation in the data.
A consumer watchdog organization wants to see whether Bank N in the northern part of a state has a higher default rate than Bank S in the southern part of that same state.
Calculate the mean, median and mode for both sets and do graph/histogram to chart the results and conclude if indeed one set of year had more the other as far a snowfall.
Which hypothesis-testing procedure would you use in the following situations? The mean time an American family lives in a particular single-family dwelling is 11.8 years.
Assume that the distribution is normal. Based on the Empirical Rule, how many students scored between 57 and 93?
When using the F-statistic for hypothesis testing of the variance, which sample variance is the numerator and which sample variance is the denominator?
At the 0.05 level of significance, is there evidence to suggest that the population mean waiting time to check out is less than 10.73 minutes?
Find the mean and standard deviation of X, the number of students in class, who will develop influenza.
Formulating null and alternative hypothesis to test the claim averaging about $5000.
The mean weight of loads of coal placed in train cars by a loading machine is 43.0 tons with a standard deviation of 8.0 tons. Assuming that the weight of loads placed in the train cars by this loader are normally distributed
Suppose that the distribution of weekly water usage for single-family homes in a particular city is mound shaped and approximately symmetric. The mean is 1400 gallons, and the standard deviation is 300 gallons.
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