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50, 33, and 48 students are selected from the Sophomore, Junior, and Senior classes with 496, 348, and 481 students respectively. Identify which type of sampling is used and why?
As a public health personnel, you conducted a survey and collected economic and health data on households in a township that is known to have a high prevalence of heart disease.
Using an investment game, the study demonstrated that people who inhaled oxytocin were more likely to give their money to a trustee compared to people who inhaled an inactive placebo. For this experimental study, identify the independent variable ..
Tthe probability distribution of each of his readings had a mean of 128 and a standard devation of 9. what is the probability of the sample mean that exceeds 140?
what is the probability of obtaining at least 6 cases in this class if the nationwide rate holds True?
The probability that a claim is filed in a given year is 0.05, independently of preceding years. What is the PMF of the total premium paid up to and including the year when the first claim is filed?
The mean income of a group of sample observations is $500; the standard deviation is $40. According to Chebyshev's theorem, at least what percent of the incomes will lie between $400 and $600?
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlation. Use a significance level of 0.05.
A jar contains black and white marbles. Two marbles are chosen without replacement. If the probability of selecting a black marble and a white marble is 0.34, and the probability of selecting a black marble on the first draw is 0.47,
Since she is allowed to reserve one time if her first serve is out what should her serving strategy be?
If you must estimate the population mean within 2 days, how many outside salespeople should you sample? Use the 90 percent confidence level.
Would it be reasonable to conclude that the population mean is 63 pounds?
Find the probability that fewer than 5 are satisfied with the airlines. (c) Find the probability that 8 or more are satisfied with the airlines.
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