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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?
Explain what you have done and what the results mean to a person who has never had a course in statistics - Give the Z scores for New Zealand college students who score 100 and 160.
Epidemiologists are researching the relationship between two levels of tobacco exposure and a positive diagnosis of esophageal cancer. With SPSS, use the data set bd1.sav and the variables tob2 (dichotomized smoking status)
Speed 800 rpm counter-clock wise looking from right-side. Determine the precession velocity and direction of the system at vertical axis through the axis centre.
A Correlation matrix (correlation, coefficients and probability level under the hypothesis rho= 0) for a company's sales force (age, years of service, and current sales) is given below. Comment.
At a party there are 30 students over age 21 and 20 students under age 21. You choose at random 3 of those over 21 and separately choose at random 2 of those under 21 to interview about attitudes toward alcohol.
If a worker at this fast food restaurant is selected at random, what is the probability that the worker earns more than 6. 75.
Give a 99% confidence interval for the mean increase in pay for all corporate CEOs.
Test the manager's suspicion at the 5% level of significance. Find the P-value or an interval containing the P-value for the sample test statistic.
in the movie casablanca rick played by humpy bogart helped a married couple by allowing the husband to win at the
Normally distributed with a mean of 48.06 pounds and a standard deviation of 3.57 pounds. Let X represent the weight of a randomly selected bag. For what value of c is P(E(X) - c
suppose that in a certain texas town 70 of the voters are republicans 20 of the voters are democrats and 10 of the
Ten automobiles were driven on a measured test track - once with standard gasoline with no additive and once with an additive supposed to increase miles per gallon (mpg). The results are given below:
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