The enrolled student population at Indiana University-Bloomington, both undergraduate and graduate, is64.9% White, 7.76% Asian, 7.32% Hispanic or Latino, 4.52% Two or More Races, 4.26% Black or AfricanAmerican, 0.0463% American Indian or Alaska Native, and 0.0287% Native Hawaiian or Other PacificIslanders. Suppose that in a random sample of 250 students, 40 of them are Asian.Suppose we sample another 250 students from this population, what is the expected proportionof Asian students?b.a.C.Suppose we sample another 250 students from this population, what is the standard deviation ofthe proportion of Asian students?For a sample of 250 students out of this population, what is the probabilty that the proportionof Asian students is between 6% and 8%?

Let be the sample proportion of Asian students.Given that,Population proportion of Asian students…

Answered: Suppose we sample another 250 students…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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
Suppose that the commuting time on a particular train is uniformly distributed between 35 and 55 minutes. What is the standard deviation of the commuting time?
n a school district, all sixth grade students take the same standardized test. The superintendant of the school district takes a random sample of 21 scores from all of the students who took the test. She sees that the mean score is 128 with a standard deviation of 41.4416. The superintendant wants to know if the standard deviation has changed this year. Previously, the population standard deviation was 25. Is there evidence that the standard deviation of test scores has increased at the α=0.005 level? Assume the population is normally distributed. Step 1 of 5 : State the null and alternative hypotheses. Round to four decimal places when necessary.
According to AC Lens, green eye color is one of the rarest with only 2% of the world's population having that eye color. A random sample of 1000 people from around the world are selected. Let p be the proportion of the sample which has green eyes. 1. What is the mean of the sampling proportion? 2. What is the standard deviation of the sampling proportion? (Round to the nearest thousandth.) 3. Find the probability that p will be between 0.01 and 0.03. P(0.01 < p < 0.03) = 4. What is the rule of thumb for normalizing the sampling distribution of proportions?
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The mean age of all 663 used cars for sale in a newspaper one Saturday last month was 7.5 years, with a standard deviation of7.1 years. The distribution ads, a reporter randomly selects 50 of these used cars and plans to visit each owner to inspect the cars. He finds that the mean age of the 50 cars he sam Complete parts a through c. a From the problem statement, which of the values 75,7.1, 7.9, and 5.6 are parameters and which are statistics? The value 7.5 is a The value 7.1 is a The value 7.9 is a The value 5.6 is a
4. You ask an SRS of 1500 college students whether they applied for admission to any other college. Suppose that in fact 35% of all college students applied to colleges besides the one they are attending. The sampling distribution of the proportion of B your sample who say "Yes" is approximately Normal with mean 0.35 and standard deviation 0.01. Sketch this Normal curve and use it to answer the following questions. (You can use the 68-95-99.7 rule for all these questions.) Round to nearest whole percent. (a) What percentage of many samples would have a larger than 0.37? 2.5 (b) What is the probability that your sample will have a less than 0.33?Å (c) what is the probability that your sample result will be either less than 0.33 or greater than 0.35?

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