Guided Practice Mariners' RBIS

15 51 35 25 58 33 64

43 33 29 14 13 11 4 10

The RBIs (runs batted in) for 15 players from the 2010

Seattle Mariners are shown. Use this data set for 1-7.

1. Order the data from least to greatest. (Explore Activity Example 1)

1,3 ,5,25

2. Find the median. (Explore Activity Example 1) -

3. Find the lower quartile. (Explore Activity Example 1).

4. Find the upper quartile. (Explore Activity Example 1).

5. Make a box plot for the data. (Explore Activity Example 1)

0

5

10 15 20 25 30 35 40 45 50 55 60 65 70 75 80

6. Find the IQR. (Example 2)

7. Find the range. (Example 3).

Abottled water distributor wants to estimate the amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company. the water bottling company’s specifications state that the standard deviation of the amount of water is equal to 0.02 gallon. a random sample of 50 bottles is selected, and the sample mean amount of water per 1-gallon bottle is 0.995 gallon a. construct a 99% confidence interval estimate for the popula-tion mean amount of water included in a 1-gallon bottle. b. on the basis of these results, do you think that the distributor has a right to complain to the water bottling company? why? c. must you assume that the population amount of water per bottle is normally distributed here? explain. d. construct a 95% confidence interval estimate. how does this change your answer to (b)?