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

Random variables X and Y are measured for a random sample of 20 individuals.  When the data are plotted on a graph, all of the points lie on a straight line that indicates that values of Y increase as values of X increase.  The correlation coefficient for these two variables is __________.

Given that P (A) = 0.30, P (B) = 0.60, and P (A ∩ B) = 0.15, find P (A|B).