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What are the characteristics of a good average? What is the relationship between various measures of central tendency and what are there applications?
BMI in children is roughtl normally distributed with the mean of 24.5 and standard deviation of 6.2. BMI of 30 or more is considered obese. Determine proportion of children are obese?
How many of the 500 intervals would you expect not to capture the true population mean? Explain by showing your calculation.
In a random sample of 200 automobile insurance claims obtained from all state insurance Company, mean=$615 and s= $135. Calculate the following intervals:
Write a critique of the article. What is the purpose and design of the survey? What is the goal of the analysis? How do the authors use information.
What does this imply about the median of the salaries at company A with regard to the median of the salaries at company B?
Change the confidence level. Refer to the previous exercise. Change the confidence level to 90% by clicking this selection in the left panel.
Using the data about age and number of hours studied, and your work from Exercise 16.47, answer the following questions:
AIDS and risk factors In the National AIDS Behavioral Surveys sample of 2673 adult heterosexuals, 0.2% had both received a blood transfusion and had a sexual.
a survey was carried out to find the salaries for technicians working in maintenance at atlanta international airport.
Can we use a linear model to predict the number of beetle larvae from the number of stumps? If so, how accurate will our predictions be?
Let X, Y, Z and be independent Gaussian random variables with equal means of µ =3. - Estimate the mean and variance.
Assume that you want to be 90?% confident that the sample percentage is within 1.5 percentage points of the true population percentage.
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