Bootstrapping is a helpful tool when A. the sample size is too small to get an accurate estimate B. the sample proportion is very close to 0 or 1 C. we want to estimate a standard deviation in any context D. we don't have technology nearby

Determine if one-tailed test or two-tailed test fits the given alternative hypothesis. 1. The mean height of Grade 12 students is less than 66 inches. 2. The standard deviation of their height is not equal to 5 inches. 3. Male Grade 7 and Grade 12 students differ in height on average.

Q2. (Unit 6) Suppose three samples (10, 15, 20) are drawn from the normal distribution. a) What is the point estimate of the mean? b) What is the point estimate of the variance?

he chipmunks in a particular chipmunk population are known to have a mean weight of 84 g and a standard deviation of 18 g. Mr. Weaver weighs 9 chipmunks that have been caught in live traps before releasing them. Which of the following best describes what we know about the sampling distribution of means for his sample? Assume the 9 chipmunks represent a simple random sample of chipmunks in the area. a. x = 84, x = 18, distribution approximately Normal b. x = 84, x = 6, shape of distribution unknown c. x = 84, x = 6, distribution approximately Normal d. x = 84, x unknown; distribution approximately Normal e. x = 84, x unknown; shape of distribution unknown