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The heights of 10 sixth graders are listed in inches: {53, 61, 54, 60, 58, 62, 55, 58, 59, 56}.
(a) Find the mean, median, mode, sample variance, and range.
(b) Do you think that this sample might have come from a normal population? Why or why not?
This assignment involves displaying an understanding of an independent t-test. Based on my hypothetical research question: What do early childhood educators report about their experiences with fathers' involvement in their programs?
In the Big Ten (the NCAA sports league) a sample showed that only 267 out of 584 freshmen football players graduated within 6 years. (a) At (alpha) a = .05
A local politician wants an estimate of the proportion of the population who support her fiscal policies. She wants the estimate to be within .06 of the true proportion. Assume a 95 percent level of confidence.
Show that there is no rational number b/a whose square is 2, as follows: if b^2 = 2a^2, then b is even, so b = 2c, so, substituting and cancelling 2, 2c^2 = a^2.
The data results are based on serum continine levels for each group. The claim is that exposure to tobacco smoke (as second-hand smoke) corresponds to higher levels of cotinine.
48 or fewer will answer the question correctly. What is the z-score that you should look up in the z-table to find the desired probability?
Management plans to sample 150 packages per week. What is the appropriate control chart?
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that
Find the probability that a randomly selected student is a nursing major. Find the probability that a randomly selected student is a nursing major given that the student is a male.
I tossed a coin 6 times and recorded the outcomes - H for heads and T for tails. The first set of tosses yielded HTHTTH and the second set of tosses yielded TTTHHH. Which set of tosses is more probable to happen? And why?
The appropriate use of multiple regression depends on being able to make four basic assumptions about the data being used to develop the regression model:
Mean of $32,000 and a standad deviation of $3000. If 100 teachers are randomly selected, find the probability that their mean salary is greater than $32,500.
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