The weights in pounds of 23 dogs were used to construct the following stem-and-leaf display using the first digit as the stem and the second digit as the leaf:. Stem     Leaves                                                    3            2     4 4            0     3     4     5     7     8     9 5            0     1     2     3     4     5 6            1     2     5     6     7 7            0     1 8 9            8 Use the stem-and-leaf display to find the lower quartile, median, and upper quartile and then use these values to construct a box plot.  Use the box plot to identify any suspect or highly suspect outliers in this dataset.

A random sample of 16 Standardbred horses was selected from a population of Standardbreds.  The mean time required for these 16 horses to run a mile while pulling a sulky was 130 seconds (i.e., 2 minutes and 10 seconds),  The standard deviation of the sample was 10 seconds. What is the point estimate of the true population mean for racing time of Standardbred horses?

The average height of a herd of cows is 50 inches and the standard deviation of the heights is 5 inches.  Only 12% of the cows are expected to be more than X inches tall.  Find the value of X.

The weights of 6 dogs (in pounds) are as follows:  30  32  28  42  40  44 Find the median.

A college professor wants to estimate the difference in mean test scores of students who have taken his statistics and genetics classes in the past 10 years.  He selects a random sample of 20 student records from the statistics course and a random sample of 22 student records from the genetics course.  These two samples were independent random samples.  The study provided the results shown in the table below.  Calculate the pooled estimate of the variance.   Statistics Genetics Sample size 20 22 Sample mean 78 75 Sample standard dev. 10 12

An experiment results in one of two possible outcomes, A or B.  We know that P(A) = 0.40, P(B) = 0.60, and P(A ∩ B) = 0.20.  Find the P(A U B).

A scientist wants to estimate the true population proportion of mares who conceive when bred by AI.  She randomly selects 500 mares and finds that 300 of them became pregnant when bred by AI.  Which one of the following is the correct 99% confidence interval for the true population proportion of mares that conceived when bred by AI?

The manager of a swine operation wants to compare the litter sizes of three pigs of pigs – Duroc, Yorkshire, and Large White.  The manager obtains a random sample of litter sizes of sows of the three breeds as shown in the table below.  Use Analysis of Variance to test at the 0.05 significance level if there is a difference in the average litter sizes of the three breeds of pigs. Litter size Large White Duroc Yorkshire 10 6 11 6 7 8 8 9 13 12 4 10 6 6 10 10 12 5 6 8 6 Total 42 67 64 Average 8.4 6.7 10.7 What are the mean squares (MS) for breed and error in the Analysis of Variance table given that the sums of squares are 131.81, 59.18, and 72.63 for total, breed, and error, respectively.

The mean height of a herd of cows is 55 inches.  The standard deviation of the heights is 10 inches.  Assume that the heights are approximately normally distributed. What is the probability that a randomly selected cow is taller than 62 inches?

The owner of a herd of pigs wants to determine if the weights of any of her pigs are outliers.  The average weight of the pigs in her herd is 250 lb and the standard deviation of the weights is 50 lb.  The heaviest pig weighs 275 lb.  What should the owner of the pigs conclude?