For the data on the following page are a random sample of college students,18-24, weekly TV watching habits
1) Group the data using the classes I provided
2) Create a histogram and boxplot
3)Calculate the mean and standard deviation using the original data not the grouped data.(round to the nearest tenths place)
4)Test the normality of the data
a)Order the values
b)Calculate the f_i
c)Find the expected z score for each f_i
d)Plot the observed values vs the expected z scores
e)calculate the correlation coeffecient and compare that to a critical value of 0.927
f) is the data approximately normally distributed?
5)Assuming a normal distribution for the amount of time spend watching TV weekly:
a) Calculate the proportion of college students aged 18-24 that watch between 21 and 36 hours a week.
b)Compare that proportion to the proportion from the sample
c)Find the 98th percentile for hours of TV watched weekly.

Hours watched weekly				lower class	upper class
0				0	4.9	freq
2.9				5	9.9
7.8				10	14.9
8.6				15	19.9
9.7				20	24.9
9.9				25	29.9
16				30	34.9
17.5				35	39.9
18.5
19
19.1
19.5
20.4
21
22.9
23.5
25.6
25.8
28.9
29.6
30.5
33.8
36.1
36.8
39.2