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Assume that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of $2,050 per hour and a standard deviation of $205.
What is the operating cost for the lowest 6 percent of the airplanes?
Does this sample provide enough evidence to conclude that self-esteem scores for these adolescents are significantly different from those of the general population? Use a two-tailed test with x =.01.
for binomial distribution with n 10 and probability of success p 0.4 find probability of less than 3 successes x lt 3
For a new HDTV the mean number of months until repairs are needed is 36.84 with a standard deviation of 3.34 months.
He argues that the regression effort says people who perform very poorly in their previous job tend to perform well in their next job. Is this what the regression effect says? Explain.
Calculate the value of Pearson correlation. Illustrate what information is provided by the numerical value of the Pearson correlation.
in a random sample of 75555 men 3448 held multiple jobs. in a random sample of 66914 women 3495 held multiple
Describe the situation and the variables and determine whether the variables are normally distributed or not. How could you change these to a normally distributed dataset?
A plus four 95% confidence interval for the difference between the two population proportions of wrist injuries is: A. 0.2909 ± 0.1674. B. 0.2909 ± 0.1069. C. 0.2909 ± 0.0907. D. 0.2909 ± 0.1275
in an oregon lottery game called cash crossword a player purchases a card for two dollars. scratching the card reveals
The following observations are weights of 10 potatoes in grams. Calculate the percentage of potatoes with weights greater than 25 grams and the range of weights for 95% of the potatoes. (Use sample statistics as the population parameters are not obse..
the data shows the list and selling prices for homes. find regression equation letting the list price be independent x
Determine her weighted mean grade? What letter grade did she earn? (A, B, C, D or F).
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