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Approximately 65% of all marketing personnel are extroverts, whereas about 50% of all computer programmers are introverts.
At a meeting of 10 marketing personnel, what is the probability that 11 or more are extroverts? (Use 3 decimal places.)
What is the probability that 6 or more are extroverts? (Use 3 decimal places.)
What is the probability that all extroverts? (Use 3 decimal places.)
(b) In a group of 4 computer programmers, what is the probability that none are introverts? (Use 3 decimal places.)
What is the probability that 2 or more are introverts? (Use 3 decimal places.)
What is the probability that all are introverts? (Use 3 decimal places.)
A psychologist is investigating the hypothesis that children who grow up as the only child in the household develop different personality characteristics than those who grow up in larger families.
Find the probability that the amount of total claims over a period of 100 days is at least $150,000. (Use the fact that the sum of independent normally distributed random variables is normally distributed, with mean equal to the sum of the individ..
Finnish Furniture manufactures tables in facilities located in three cities- Reno, Denver, and Pittsburgh. The tables are then shipped to three retail stores located in Phoenix, Cleveland, and Chicago.
The nation health department has concerns with the chlorine level of 0.4% mg/mL at a local water park raises to unsafe level.
In a regression analysis, the sum of the squared deviations between y and y-bar is SST = 200.0. If the sum of the squared deviations about the regression line is SSE + 40.0, what is the coefficient of determination?
Interpret coefficient on log (salesm). If salesm were to be increased by 20%, what would be estimated change in mktgp? Would this effect be substantive?
A company wants to know if minorities are more likely to be in certain job categories than others. Their data base codes employees 1 for clerical, 2 for custodial, and 3 for manager. A logistic equation was fit to the data with SPSS.
Pollsters try to determine whether or not a person is a "likely voter" before they count their opinion in a poll. If we assume 40% of the registered voters will actually vote, in a random sample of 100 registered voters we can be 95% confident tha..
The following frequency table determine the ages of 100 shoppers at the local grocery store. Compute the sample mean for this data (mean for the grouped data).
Design an imaginary study or discuss an actual study you've read about that has an experimental or quasi-experimental design that used or would use t-tests or ANOVAs in the data analysis.
What additional strategies (up to 3) you would propose that may increase validity of the findings.
For the 20 test scores shown, find the percentile rank for a score of 86.
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