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The mean of a normal probability distribution is 60; the standard deviation is 5.
a. About what percent of the observations lie between 55 and 65?
b. About what percent of the observations lie between 50 and 70?
c. About what percent of the observations lie between 45 and 75?
would this prove that they are exceeding their goal, using α = .025?
The standard deviation of the differences d for the paired sample data s d = ____________
The explanatory variable which is a measure of neighborhood socio-economic status variable RFM. Response variable is percent (%) of bicycle riders that wears a helmet.
Create the 90% confidence interval for mean score of all such subjects. You may suppose scores are usually distributed.
No, there is not enough information to refuse hypothesis that proportion of male students who live on campus and proportion of female students who live on campus are same as the test value -1.65 is inside acceptance region (-1.96,1.96).
A statistics instructor wants to know which route will get her to school the fastest. Each day from October 2 to November 15, when she gets to the turn point she checks the odometer on her car
Determine the probability that mean annual snowfall during 40 randomly picked years will exceed 111.8 inches?
Determine the variance of X? (Illustrate your computation either in Table or in Equation form)
36 values given here are based on summary statistics from research by cumming. Do you think that these data are normally distributed?
The standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was
Formulate the hypotheses that can be used to determine whether union membership increased in 2006.
Evaluate the difference in the mean ratings and find the standard deviation of the difference in the ratings, what is the chance both children are boys?
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