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?

A swine producer reads a report stating that the average litter size in the US is 7.8 pigs per litter.  However, he feels that the average litter size on his farm is not 7.8 pigs/litter (he wants to detect departure in either direction from the hypothesized mean of 7.8 pigs/litter).  To test his hypothesis, he reviews his records for the past year and randomly selects 16 litters, which averaged 8.0 pigs/litter.  The standard deviation of litter size was 1 pig/litter. Calculate the value of the test statistic needed to test the null hypothesis.

A ____________ is a collection or set of data that describes a phenomenon of interest to us.

The fleece weights of 8 sheep (in pounds) are as follows: 5     6     7     8     9     10     10     12 For this sample of 8 fleece weights, the range is