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The combined scores for females taking the SAT test are normally distributed with a mean of 998 and a standard deviation of 202. If a college includes a minimum score of 1050 among its requirements, what percentage of females do not satisfy that requirement?
The scatter diagram for data set below is shown. a) given that x= 3.667, sx = 2.5819889, sy= 1.5937377 and r= -0.8894261, find out least -regression line.
Data collected by a child development scientist produced a 95% confidence interval for the mean age, μ (in weeks) at which babies began to craw as [21.4, 31.6]
A sample of 45 students enrolled in the university indicates that X (bar) = $285.4 and s = $42.20. Using the 0.05 level of significance, is there evidence that the population mean is above $300?
Same chance of being selected as does any other group. What is the probability that at least one of the shifts will be unrepresented in that sample of workers?
Find the value of k that makes f(x; y) a valid probability distribution.
A deck of playing cards contains 52 cards, four of which are aces. What is the probability that deal of a five-card hand provides?
An auditor reviewed 25 oral surgery insurance claims from a particular surgical office, determining that the mean out-of-pocket patient billing above the reimbursed amount was $275.66 with a standard deviation of $78.11.
26% of college students say they use credit card because of the rewards program . You randomly select 10 college students and ask each to name the reason he or she uses credit cards.
A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative action programs for women and minorities for admissions to colleges and universities.
Why are you no longer directly comparing sample means? How does using the F test - the analysis of variance (ANOVA) reduce your Type I error rate? What is the difference between a within-groups and a between-groups variance?
The life span of a battery is normally distributed, with a mean of 2500 hours and a standard deviation of 50 hours. What percent of batteries have a life span that is more than 2590 hours?
What variables that affect blood pressure might confuse the comparison of average blood pressures for users and nonusers?
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