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An Insurance company estimates the proportion of people that have a hybrid car 40%. Calculate the maximum allowable error if the company take 900 person as a sample of its study and 90% confidence interval?
You wish to determine if teaching statistics with definitional formula changes students' conceptual understanding of psychological statistics.
In business, there seems to be resistance to change whether the change will be good or bad. Why do people resist change?
What are the expexted value and standard deviation, respectively, of the number of successful first serves? What is the probability she makes 90 or more successful first serves?
Find method of moments estimators for r and p. [Here E[X] = r(1 - p)/p and E X2 = r(1 - p)(r - rp + 1)/p2.]
By using the age midpoints x and the percentages of nurses, do we have a valid probability distribution? Describe.
The city of Springville is building a new fire station in their city. The city is expanding and is in need of a second fire station closer to the newer areas
You would like to invest if the price is likely to rise in the long run. You have data on the daily average price of this stock over the past 12 months. Your best action is to?
a recent study focused on the amount of money single men and single women save monthly. the information is summarized
You can invest the money in one of two mutual funds with similar yearly average returns (9.8% vs. 9.9%). Which mutual fund would you choose?
suppose that it is known that the number of items produced at a factory per week is a random variable x with mean 50. a
suppose we wanted to compare the somatic complaints as shown on a scale known as pss of 3 groups of people non-smokers
Ozone. Ozone levels (in parts per billion, ppb) were recorded at sites in New Jersey monthly between 1926 and 1971. Here are boxplots of the data.
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