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Unformatted text preview: Name: Andrew Coppa Section: 012 Email: aic5256@psu.edu Lab Ch 9 and 10 1. It has been reported that the proportion of all PSU students who smoke cigarettes is 0.10. a. The given information is about what parameter? State the name of the parameter and the correct statistical symbol of the parameter. P= PSU students who smoke cigaretts b. If repeated samples of size 100 are taken from the population of PSU students to see what proportion smoke cigarettes, what is the shape of the sample statistic? Skewed left c. If repeated samples of size 100 are taken from the population of PSU students to see what proportion smoke cigarettes, what is the center of the sample statistic? 5 d. If repeated samples of size 100 are taken from the population of PSU students to see what proportion smoke cigarettes, what is the spread of the sample statistic? 95 e. Use the Empirical Rule and your answers to parts bd above to find an interval of values into which the sample proportion will fall 95% of the time. 65 to 70 % f. If we take a random sample of n = 100 and we find that the proportion of students in the sample who smoke is 0.03, would you second guess the information given at the beginning of this question? Use your results from part e to explain your response. No I would not second guess the information. 2. It has been reported that the proportion of female PSU students who are from PA is 0.68 and the proportion of male PSU students who are from PA is 0.65. a. The given information is about what parameter? State the name of the parameter and the correct statistical symbol of the parameter. P1p2= Proportion of female to male PSU students b. If repeated samples of size 50 are taken from the population of PSU male students and 50 from the population of PSU female students to see what proportions are from PA, what is the shape of the sample statistic? Symmetric c. If repeated samples of size 50 are taken from the population of PSU male students and 50 from the population of PSU female students to see what proportions are from PA, what is the center of the sample statistic? 27 d. If repeated samples of size 50 are taken from the population of PSU male students and 50 from the population of PSU female students to see what proportions are from PA, what is the spread of the sample statistic? 15 e. Use the Empirical Rule and your answers to parts bd above to find an interval of values into which the difference of the sample proportions will fall 95% of the time. 35 40 % f. If we take a random sample of n females =50 and n males =50 and we find that the proportion of females in the sample who are from PA is 0.75 and the proportion of males in the sample who are from PA is 0.60, would you second guess the information given at the beginning of this question? Use your results from part e to explain your response....
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 Spring '11
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