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Question: Give an example of two discrete random variables X and Y on the same sample space such that X and Y have the same distribution, with support {1, 2,..., 10}, but the event X = Y never occurs. If X and Y are independent, is it still possible to construct such an example?
The sample correlation coefficient between x and y is 0.375. It has been found out that the p-value is 0.256 when testing H0: ρ = 0 against the two-sided alternative H1: ρ ≠ 0. To test H0: ρ = 0 against the one-sided alternative H1: ρ > 0 at a sig..
A student survey. Tonya wants to estimate what proportion of the students in her dormitory like the dorm food. She interviews an SRS of 50 of the 175 students.
What is the major difference between finding significance and confidence intervals using population samples or using population proportions?
It is known that 70% of the students follow the study program. Find the probability that a student who has earned a C or better grade, followed the program.
In a random survey of 226 college students, 20 reported being only children (with no siblings). Estimate the proportion of students nationwide who are only children.
A social psychologist is studying college students attitudes toward drinking and driving. He is specifically interested in attitude change as a result of years in college and of viewing the consequences of drinking and driving accidents.
Analyze the data and write a report summarizing your work. Be sure to include details regarding the statistical methods you used, your assumptions, and your conclusions.
A survey of undergraduate students in the School of Business at Northern University revealed the following regarding the gender and majors of the students:
Assume the cholesterol levels of adult American women are normally distributed with a mean of 190 mg/dL and a standard deviation of 26 mg/dL. What level would represent the 10th percentile?
why do you use the chi-square statistic? what type of data is used with chi-square anaylisis? what are the
The Starbucks in the Bauer College of Business found that 24% of customers purchase more than one cup of coffee per day from their shop. If 180 customers are randomly selected one day, what is the probability that no less than 25% of them purchase..
Test at .01 level of significance if mean number of number of calories for Brand A 16 oz. yogurt cups is greater than mean calories for Brand B 16 oz. yogurt cups.
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