A population of rabbits has a mean weight of 10 lb and a standard deviation of the weights equal to 2 lb.  A rabbit breeder selects 5,000 samples of 64 rabbits each, calculates the mean weight of the rabbits in each of these 5,000 samples, and then graphs the 5,000 sample means. The standard deviation of these 5,000 sample means is expected to be equal to _______.

An Animal Scientist wants to estimate the average weaning weight of the Hereford breed of beef cattle.  Therefore, he selects a random sample of 100 Hereford calves and weighs them on the day they are weaned from their mothers.  The sample mean for these 100 calves is 450 lb and the sample standard deviation is 50 lb.  What is the point estimate of the mean of the entire population of all Hereford calves?

Which one of the following is not an example of a continuous random variable?

Consider the following discrete probability distribution:                                                                x         -2         -1         0          1           2 P(x)   0.10     0.08     0.25     0.31     0.26 Calculate the mean (μ) of this discrete probability distribution.

Which one of the following is not an example of a discrete random variable?

In order to compare the means of two populations, independent random samples are selected from each population, with the results shown in the table below.  Use these data to construct a 98% confidence interval for the difference in the two population means.   Sample 1 Sample 2 Sample size 500 400 Sample mean 5,280 5,240 Sample standard dev. 150 200

A scientist wants to estimate the proportion of mares that conceive when bred by artificial insemination (AI).  She selects a random sample of 500 mares and finds that 300 of the 500 mares conceived when bred by AI.  What is the point estimate of the true population proportion of mares who become pregnant when bred by AI?

Independent random samples of litter sizes were selected from the Yorkshire and Landrace breeds of swine, with the following results: Yorkshire Landrace 8 7 9 8 10 9 8 8 9 7 10   We want to analyze these data using Analysis of Variance with a Completely Randomized Design. Which one of the following is not an assumption of this Analysis of Variance with a Completely Randomized Design?

If we roll a single die, the sample points are a 1, 2, 3, 4, 5, or 6.  Consider the following two events:        Event A:  toss an even number        Event B:  toss a number less than or equal to 2 List the sample points that would be included in the union of events A and B.

________________ can be applied to any data set, regardless of the shape of the distribution.