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An article in Runner's World magazine described a study that compared the cardiovascular responses of 20 adult subjects for exercises on a treadmill, on a minitrampoline, and jogging in place on a carpeted surface. Researchers found average heart rates were significantly less on the minitrampoline than for the treadmill and stationary jogging. Does this information represent descriptive statistics or inferential statistics? Why?
on the average mr. z drinks and drives once in 4 years. he knows that every time when he drinks and drives he is caught
Write the general form of a regression equation that has a single predictor variable. Identify the criterion variable, the predictor variable, the regression constant, and the regression coefficient.
If a random sample of 40 customers is taken, what is the probability that the sample average expenditure per customer for this sample will be 87.00 or more?
Increasing confidence level will increase width of confidence interval. This is because the fact that increasing confidence interval will increase value of z(α/2), which will increase the size of standard error (z*s/√n).
make a decision about the given claims. use only the rare event rule stated in section 8-2 and make subjective
Cleveland, Inc., plans to finance its U.S. operations by repeatedly borrowing two currencies with low interest rates whose exchange rate movements are highly correlated. Will the variance of the two-currency portfolio's effective
identify the circumstances in which the median rather than the mean is the preferred measure of central
Calculate the p- value and use it to test H0 versus H a at each of a .10, .05, .01, and .001. d How much evidence is there that the mean composite satisfaction rating exceeds 42?
With a 5% margin of error, a 95% confidence level, and a population size of 2,000,000, how do you calculate the sample size for the mean? No standard deviation or population proportion is provided. Please show your work.
Here are the annual numbers of deaths from tornadoes in the United States from 1990 through 2000.- Find these statistics by hand (no calculator!):- mean- median and quartiles.
Assuming that the heights are recorded to the nearest half-centimeter, how many of these students would you expect to have heights.
A student decided that this is a binomial distribution problem. The student found that the probability of all four engines failing is 4.1E-09. Is that answer correct?
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