A perfect negative correlation between variables X and Y indicates that the correlation between these two variables is equal to __________.

A rabbit falls at the 75th percentile for weight.  This means that:

A university dean is interested in determining the proportion of students who receive some sort of financial aid.  Rather than examine the records for all students, the dean randomly selected 200 students and finds that 118 of them are receiving financial aid.  The dean performs the calculations needed to determine if the sample size is large enough to use large-sample confidence interval procedures to estimate the true population proportion.  Which one of the following statements is true?

The ________ ________ is the set of possible computed values of the test statistic for which the null hypothesis will be rejected.

It seems reasonable to assume that the number of times a team punts the ball in a football game would be negatively correlated with the number of points that the team scores (i.e., if a team is forced to punt frequently they are probably not moving the ball very well and probably are not scoring many points).  Number of punts (variable X) and number of points scored (variable Y) for a particular team in a random sample of five games are as follows: Number of Punts, X          Number of Points, Y              2                                         35              5                                         14              3                                         21              2                                         21              2                                         28   Calculate the slope of the least squares line for the regression of Y (points scored) on X (number of punts).

A crop scientist would like to know the average yield of soybeans in Ohio (in bushels per acre).  A random sample of 225 soybean fields in Ohio yields a mean of 48 bushels per acre and a standard deviation of 7.5 bushels per acre. Estimate the population mean for the yield of soybeans In Ohio using a 95% confidence interval.  Interpret the confidence interval that you derived.

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 mean of these 5,000 sample means is expected to be equal to _______.

The manager of a car dealership records the colors of the automobiles on his used car lot.  The type of data being collected is ____________.

The Australian Journal of Zoology reported on a study of the diets and water requirements of spinifex pigeons.  Sixteen pigeons were captured in the desert and the crop (i.e., stomach) contents of each were examined.  The weight of dry seeds in the crop of each pigeon was measured and recorded.  The mean was 1.4 grams and the standard deviation was 0.20 grams. Find a 99% confidence interval for the average weight of dry seeds in the crops of spinifex pigeons inhabiting the Western Australian desert.

An animal scientist conducts a study to estimate the proportion of cows of the Charolais breed that require assistance during calving.  A random sample of 500 Charolais cows is selected.  Results of the study show that 100 of the 500 cows in the sample required assistance in giving birth.  Construct a 99% confidence interval for the true population proportion (p) of Charolais cows that require assistance during calving.  Explain the meaning of the confidence interval that you derived.