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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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.
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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?
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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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