Find the mean of a binomial probability distribution with a sample size of n = 25 and a probability of success of 0.30.

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.

Suppose we want to make an inference about the difference in population proportions (p1 – p2).  For sufficiently large sample sizes, n1 and n2, the mean of the sampling distribution of p1-hat minus p2-hat is equal to __________.

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 College of Food, Agricultural, and Environmental Sciences wants to estimate the proportion of students that are female.  In a small pilot study, they obtain a sample estimate of 0.60 for the proportion of students in the college that are female.  What sample size would be needed if the college administration wanted to estimate the proportion of students that are female correct to within 0.03 with a probability of 0.98?

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

Weights of 15 pigs are used to construct the following stem-and-leaf display: stem          leaf                                              21            0 22            2     5     5     7     9 23            1     2     8     9 24            1     4     6 25            2     4                                                                            Using the stem-and-leaf display, find the upper quartile.

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 standard normal distribution has

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.