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In the last quarter of 2007 a group of 64 mutual funds had a mean return of 0.9% with a standard deviation of 5.2%. Consider the normal model N(0.009.052) for the returns of these mutual funds.
a. What value represents the 40th percentile of these returns?
b. What value represents the 99th percentile?
c. What is the IQR, or interquartile range of the quarterly range of this group of funds?
To make a p-chart for the nonconforming units. The coating of the candy bar is currently make by a process which can result in surface cracking.
They estimated the proportion of students at the university who prefer outdoor exercise as (0.5745, 0.8217), with 95% confidence. Which of the following is an appropriate interpretation of this confidence interval?
Use descriptive statistics to explain how parental involvement and interests in child's education can impact on educational attainment measured in terms of their numeracy (v24_7), literacy (v28_7) and creativity skills (v25_7 and v26_7)
Use the sales data given below determine: a) The least square trend line.
At the .05 significance level, can we conclude that the guideline is still reasonable?
Which of the following best explains how the F ratio examines differences among groups? A. The critical F is compared to the critical t.
A bowl with 10 marbles: 2 red marbles, 3 green marbles, and 5 blue marbles. We randomly select 4 marbles from the bowl, WITH REPLACEMENT, that is once a marble is selected, its color is noted and the marble is put back in the bowl (notice this doe..
Determine what analysis would you do on each problem (ie, one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
The mean return for the random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Test the null hypothesis: H0: mu = 15% at α = 0.05.
Of the adults in Jefferson County, 10% have had CPR training
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
Thirty-two samples of 8 items each were collected from a process. The average sample mean is 12 and the average range is 0.10.
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