Suppose we sample another 250 students from this population, what is the expected proportion of Asian students? b. a. C. Suppose we sample another 250 students from this population, what is the standard deviation of the proportion of Asian students? For a sample of 250 students out of this population, what is the probabilty that the proportion of Asian students is between 6% and 8%?

Recent polls indicate that if a federal election would be held today, 34.7% of Canadian voters would cast his/her vote for the Liberal Party candidate in his/her riding. Suppose you are a political pollster, and you are to randomly pick n = 451 Canadian voters, asking each (a) What can you expect the value of p to be? Enter your answer using all the decimals you can. (b) Find the value of the standard deviation of p. Enter your answer using all the decimals you can. στ Which political party will you support in the next federal election? (c) Find the probability that proportion of your sample of 451 that will indicate support for the Liberal Party is at least 33% to at most 37%. Enter your answer using all the decimals you can. P(0.33 0.37) ☐ (d) 2% of the time, the observed value of your statistic will exceed what value? Enter your answer using all the decimals you can.

12. (Two Samples) According to a survey, the mean price of gasoline in the United States was $1.20 per gallon in 1995 and $1.10 per gallon in 1994. (U.S. News & World Report, June 12, 1995). Suppose these means were based on random samples of 100 gasoline stations for 1995 and 120 gasoline stations for 1994. Also, assume that the sample standard deviations were $0.11 for 1995 and $0.10 for 1994. a. Construct a 98% confidence interval for the difference between the mean gasoline prices for 1995 & 1994. b. Test at the 1% significance level if the mean gasoline price was higher in 1995 than in 1994.

If the sample size is 100 and the population standard deviation is 20, then the standard deviation of the sampling distribution for means is 2. O True O False