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The ADJO Police Department has reviewed its pay scales. It determined that its personnel have an average salary of $35,000, with a standard deviation of $2500. Assuming that the salaries adhere to a normal distribution, what percentage of the personnel has a salary that exceeds $45,000? What percentage of personnel will not exceed $45,000? What percentage of the personnel has a salary between $30,000 and $40,000 per year?
Some students see a steady price, while others see regular sales that temporarily cut the price. Students are asked the price they would expect to pay. This is an example of?
A local health care company wants to estimate the mean weekly elder day care cost. A sample of 10 facilities shows a mean of $250 per week with a standard deviation of $25. What is the 90 percent confidence interval for the population mean?
Level of significance, can we conclude that there are differences in the perceptions for marketing managers, marketing research specialists, and advertising specialists. Use Fisher's LSD approach to determine where the differences occur.
Motorola used the normal distribution to determine the probability of defects and the number of defects expected in a production process.
suppose the probability is 0.8 that any given person will believe a tale about the transgressions of a famous actress.
find the area under the normal curve to the left of z -1.57 plus the area under the normal curve to the right of z 2.57
The price of shares of Bank of Florida at the end of trading each day for the last year followed the normal distribution. Assume there were 240 trading days in the year.
Generate a 95% confidence interval for the difference in mean systolic blood pressures between groups. Generate a 95% confidence interval for the difference in proportions of patients with hypertension between groups.
managers at an automobile manufacturing plant would like to estimate the mean completion time of an assembly line
the 70-year long-term record for weather shows that for new york state the annual precipitation has a mean of 39.81
the miles-per-gallon obtained by the 2010 model q cars is normally distributed with a mean of 22 miles-per-gallon and a
the theorem that states that the sampling distribution of the sample mean is approximetly normal when the sample size n
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