1. Studies have found suicide rates to vary by location.The table below shows the teen births per 1,000 women age 15-19 in 6 states for2006.
|
States
|
Teen birth rateper1,000
|
|
Alabama
|
53.5
|
|
California
|
39.9
|
|
Colorado
|
45.8
|
|
Nevada
|
55.8
|
|
New Hampshire
|
28.7
|
|
New York
|
25.7
|
|
Texas
|
63.1
|
|
Washington, DC
|
48.4
|
|
a) Mean ______________________
b) Median position ______________
c) Median value ________________
d) Mode ______________________
2. Use this frequency distribution of hours studied in the past week by students to answer the questions below.
|
Hours Studied in a Week
|
F
|
|
|
|
|
10
|
1
|
|
|
|
|
9
|
0
|
|
|
|
|
8
|
2
|
|
|
|
|
7
|
4
|
|
|
|
|
6
|
7
|
|
|
|
|
5
|
11
|
|
|
|
|
4
|
5
|
|
|
|
|
3
|
3
|
|
|
|
|
2
|
4
|
|
|
|
|
1
|
2
|
|
|
|
|
0
|
1
|
|
|
|
|
Total
|
|
|
|
|
a) Fill inthecolumns in thetablebelow (as needed)
b) Calculate the Mean ____________________
c) Calculate the Variance _________________________
d) Calculate the Standard Deviation ___________________
e) What does this Standard Deviation Mean? ____________________________________________
3. Provide an experimental and null hypothesis that describes the mean weight loss for men versus women in a biggest loser contest.
Null -
Experimental -
4. In a test of the hypothesis that females smile at others more than males do, females and males were videotaped while interacting and the number of smiles emitted by each sex was noted. Using the following number of smiles in the 5-minute interaction, use a t-test to determine if the null hypothesis that there are no sex differences in the number of smiles is true.Use .05 p-value to determine significance.
|
MALES (Group A)
|
FEMALES (Group B)
|
|
8
|
15
|
|
11
|
19
|
|
13
|
13
|
|
4
|
11
|
|
2
|
18
|
|
7
|
17
|
|
9
|
10
|
|
9
|
7
|
|
6
|
4
|
a) T-ratio _________________________________________
b) df (degrees of freedom) ___________________________________
c) What is the Research/Alternative Hypothesis (two-tailed)?
d) Should the null hypothesis be rejected?
5) A sports psychologist was interested in testing the effect of a simple relaxation technique on college basketball players' free throw shooting accuracy. Each player was asked to shoot 20 consecutive free throws and the number of successful attempts was recorded. The players were then trained to use a simple 5 second relaxation technique while preparing to shoot a free throw. The players then returned to the court and shot 20 consecutive free throws again. The resulting data are given below:
Number of Free Throws Completed Per Twenty Attempts
|
pre
|
Post
|
|
12
|
13
|
|
15
|
15
|
|
9
|
11
|
|
16
|
15
|
|
12
|
15
|
|
15
|
18
|
|
17
|
17
|
|
10
|
12
|
|
12
|
13
|
|
14
|
17
|
a. What is the appropriate t-test to conduct?___________________________________
b. T-ratio ______________________________________
c. df (degrees of freedom) __________________________
d. Should the null hypothesis be rejected? Use .05 p-value to determine significance.
e. Please state your findings in one sentence
Attachment:- Assignment.rar