Which Test should I use? That\'s all im asking Selecting the Correct Test Proced
ID: 3225087 • Letter: W
Question
Which Test should I use? That's all im asking
Selecting the Correct Test Procedure
Instructions: Choose the number of the correct statistical procedure (test) in each of the problems listed below. Use the information to set up the appropriate null hypothesis and give the type of the response variable (nominal, ordinal, discrete, or continuous). Choices of tests include:
· 1-sample z-test about a proportion (1)
· 1-sample t-test about a mean (2)
· 2-sample z-test about two proportions (3)
· 2-sample t-test about two independent means (4)
· paired t-test about average difference of two means (5)
· t-test about a slope of a regression line (6)
· Chi-square test (7)
6. Students were asked: How many weeks do you think it is appropriate to date someone before engaging in sexual activity? Several groups in Stat 200 compared males and females on this issue. The results were as follows:
N Mean StDev SE Mean
Males 71 8.2 26.0 3.1
Females 120 16.2 19.8 1.8
7. One faculty member in statistics believed the average number of hours spent studying for Stat 200 was 4, but most other faculty members think it is less than 4. Here are the responses of 20 students who responded to a survey on the issue:
1 3 0 1 10 2 0 2 4 0 3 1 3 1 1 2 3 0 0 0
On the basis of this data, is the average less than 4? (The sample average was 3.7 with a standard deviation 6.8).
8. Have females gotten taller over the past few years? In 1999 the population average height of 21-year old women was 64. 3" with a population standard deviation of 2.5". In 2009 a random sample of 16 21-year old women resulted in an average height of 65.8". Does this data provide sufficient evidence for us to assert that the average height of women increased from the value reported in 1999?
9. A shoe manufacturer asked one of his researchers to find out how to guess what the length of a person’s left foot would be using his/her height. The researcher came up with the following data on 12 people:
Length of Left foot 17.5 24.0 29.0 25.5 20.0 22.5 32.0 28.0 24.5 26.5 27.0 25.0
Height of Person 63 63 72 63 65 61 77 76 64 64 65 62
What statistical test should be used to see how the two variables are related?
10. Given below are the responses of 200 students to the questions: Do you think your self-esteem has risen since coming to college? & Are you (or do you think you are) overweight or about right or underweight?
Overweight About Right Underweight Total
Self-Esteem No 24 35 5 64
Yes 31 89 16 136
Total 55 124 21 200
Is there a relationship between self-esteem and weight perception?
11. The amount of cooked beef in hamburgers was compared at two fast-food places (Orion’s and Leo’s). The weights (in ounces) of 7 Orion hamburgers and 5 Leo hamburgers are given below:
Orion’s 7.2 7.8 7.4 7.3 7.4 7.6 7.5
Leo’s 7.5 7.9 7.6 7.7 7.8
Is the average amount of beef the same at the two places? Or are they different?
Explanation / Answer
qstn 6 : 2-sample t-test about two independent means (4)
qstn 7 : 1-sample t-test about a mean (2)
qstn 8 : t-test about a slope of a regression line (6)
qstn 9 : Chi-square test (7)
qstn 10 : (data is not understable)
qstn 11 : 2-sample t-test about two independent means (4)
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