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The average annual rate for the United States was $1317. Suppose annual rates of auto insurance in the United States are normally distributed with a standard deviation of $324. Based on these data, what is the probability that a randomly selected auto insurance rate in the United states would be greater than $1750?
The so-called "Gambler's Fallacy" makes the mistake of not recognizing:
For the preceding situation, discuss the advantages and disadvantages of using a quasi-experimental design in contrast to conducting a true experiment.
What can researchers do to minimize error variance?- Discuss the trade-off between internal and external validity. Which is more important? Explain.
a study is conducted to determine whether sunshine affects depression. eight individuals are given a questionnaire
Find a 95% confidence interval for the mean amount of interest it could gain if each of its customers paid exactly one day more promptly.
At 95% confidence, test to determine if more than 21% of the population will like the new soft drink.
What is the regression formula - how reliable do you think the estimates will be based on this formula? Explain your answer by citing the relevant metrics.
The average number of hours worked per week for married men in the early 1990s had a mean of 42.6 and a standard deviation of 12.9.
Conduct a hypothesis test using the .04 level of significance to determine if there is a difference between the population means.
1. the diameter of a spindle in a small motor is supposed to be 5 mm. if the spindle is either too small or too large
Maximum change in length of BD must not exceed 0.001 times the length of ABC, determine the smallest-diameter rod that can he used for member BD.
Formulate a spreadsheet model for performing a computer simulation of the daily sales. Perform 250 replications and obtain the average of the sales over the replications.
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