安徽大学20092010学年第1学期《社会统计学》期末考试试卷(A卷)

安徽大学2009—2010学年第1学期
《社会统计学》期末考试试卷（A卷）
（时间120分钟）
院/系专业姓名学号
题号一二三四五六七总分
得分
一、简答题（每小题2分，共20分）
得分
1.What kind of method will be used if the distribution of a quantitative variable is highly
skewed?
2.What are the necessary conditions for confidence interval when the situation is for two
variables?
3.For a 95% confidence level, what is the approximate margin of error for a sample proportion?
4.What is the confidence interval?
5.If X is a binomial random variable based on n trials with success probability p, and n is large,
and then the random variable X is also approximately normal, what is conditions for that?
6.What relationship is it between binomial random variable and binomial experiment?
7.Assuming probability is 1/2 that a randomly selected individual will be taller than median
height of a population, what is the probability that 3 randomly selected individuals will all be taller than the median?
8.What is Mutually Exclusive Events?
9.What kind of questions can be asked from a scatterplot?
10.For one categorical variable which graph tool will be used to describe the data?
二、表格分析题（每小题5分，共5分）
得分 1.What kind of table is it? What kind variables are involved?
Do you think there is a relationship between two variables in the population?
三、图解题（每小题5分，共15分）
得分
1.According to the plot, do you think regression conditions 1, 2 and 3 are satisfied?
2.What kind graph is it? Which sex has higher median?
3.What kind of graph? Is there a linear relationship or nonlinear one?
四、计算题（每小题10分，共60分）
得分
1.An experiment to compare Weight Loss Programs, calculate F
value of ANOV A for weight loss and three programs. The data and its dot plot are as follows:
2. Data Hours spent watching TV and hours spent on computer per week for n = 25 students.
Task: When the sample mean of the differences (d) is 5.63 and standard deviation of d is 15.24, make a 90% CI fo : r the mean difference in hours spent using computer versus watching TV (It is a
bo) and all took a pill (Zyban or placebo).
Make approximately 95% CIs please )
paired data case).
3．Study: New England Journal of Medicine （3/4/99) ：893 participants randomly allocated to four treatment groups: placebo, nicotine patch only, Zyban only, and Zyban plus nicotine patch. Participants blinded: all used a patch (nicotine or place Treatments used for nine weeks. The data is as follows.
Task: To see if zyban is more efficient than nicotine. (
4. Would you date someone with a great personality even though you did not find them attractive? ask: make two approximate 95% CIs for both of male and female as well as make a conclusion.
5. ” is approximately a binomial random variable. What are the mean and the standard deviation? Women: 61.1% of 131 answered “yes.” Men: 42.6% of 61 answered “yes.” T
50% of large population would say “yes” if asked, “Do you believe there is extraterrestrial
life?” .Sample of n = 100 are taken. X = number in the sample who say “yes
Sample of 9th grade teens: 49.1% boys, 50.9% girls. Results: 22.9% of boys and 4.5% of girls
admitted they gambled at least once a week during previous year. Using 6. Two-Way Table method to compute P (boy and gambler), P (boy | gambler), and P (gambler).。