Assume that, when we plot the data points for variables X and Y, all of the points lie on a straight line with a positive slope.  This indicates that the correlation between these two variables is equal to __________.

Health care issues are receiving a great deal of attention in both the academic and political arenas.  A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for Medicaid, but who have no private health insurance.  The mean age of the 50 uninsured senior citizens in the survey was 74.04 years and the standard deviation of their ages was 9.75 years.  If we assume that the distribution of ages is symmetric and mound-shaped, what percentage of the respondents in the survey would be expected to be between 64.29 and 83.79 years old?

It seems reasonable to assume that ovulation rate and litter size in pigs would be positively correlated.  In other words, if a sow releases more eggs (i.e., ova) in a given estrus period, she will probably end up producing more pigs in her litter.  Number of eggs ovulated and litter size for a random sample of 6 sows are as follows: Number of Eggs, X       Number of Pigs Born, Y                14                                  7                15                                  7                16                                  9                17                                 10                17                                 10                17                                  11 We want to test our assumption of a positive correlation between number of eggs ovulated and number of pigs in the litter.  State the appropriate null and alternative hypotheses.

The Central Limit Theorem says that the sampling distribution of the sample mean is approximately normal under certain conditions.  Which of the following is a necessary condition for the Central Limit Theorem to be used?

A local consumer reporter wants to compare the average cost of grocery items purchased at 3 different supermarkets:  Kroger, Giant Eagle, and Sam’s Club.  Prices (in dollars) were recorded for a sample of 10 randomly selected grocery items at each of the 3 supermarkets (i.e., a total of 10 x 3 = 30 prices were recorded).  We will consider this to be a one-way analysis of variance (i.e., a completely randomized design).  The partially completed Analysis of Variance table is shown below: Source               df          SS          MS          F        Total                               120 Supermarkets                  20 Error                               100                                          State the null and alternative hypothesis being tested by the consumer reporter..

The grades of 8 students on an exam were as follows: Student Grade 1 66 2 70 3 64 4 88 5 74 6 72 7 87 8 79     Calculate the mean grade of these 8 students.

A _________  _________ of a parameter is a statistic, a single value computed from the observations in a sample, that is used to estimate the value of the target parameter.

The owner of a vet clinic wishes to estimate the mean number of animals seen in the clinic during an 8-hour workday.  The owner randomly samples 36 different 8-hour workdays and determines the number of animals seen each day.  The sample mean is 15.5 animals seen per day and the sample standard deviation is 4 animals seen per day.  What is the point estimate of the mean (μ) of the entire population of number of animals seen in this clinic per 8-hour workday?

The following is a valid probability distribution for a discrete random variable, X: X             0           1            2            3        P (X)     0.20       0.30       0.30       0.20    

Assume that a population of rabbit weights has a uniform distribution, instead of a normal distribution.  We calculate the mean of 1,000 random samples from this population, where the number of observations in each sample is equal to 50.  Would you expect the 1,000 sample means to be normally distributed?