Write down a reasonable pdf of xbar
Given: mean value 10000, and standard deviation 500, random sample size n = 40
1) Expected value of sample mean?
2) Variance of sample mean?
3) Write down a reasonable pdf of Xbar, f(x).
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Calculate the number of ways that a committee of 3 students which has at least 1 girl can be selected from the group
Find out the probability that at least 2 women are on the committee.
Let Y be a random value with the pmf in the table
Two random variables and their possible values, and joint pdf of (X,Y), and the function.
If a men's basketball team shoots 70% on free throws. If we randomly pick a player to shoot 5 free throws, determine the total probability that he makes 2 OR less?
Truck tire life is normally distributed with the mean of 70,000 miles and standard deviation of 5,000 miles. Based on buying four tires from a manufacturer, determine the probability that a tire will last between 66,000 and 71,000.
500 of the voters are randomly chosen and asked whether they planned to vote for democratic incumbent or the Republican challenger. Of 500 surveyed, 400 said they would vote for Democratic incumbent. Using the 0.90 confidence coefficient, determin
Quantitative research methods, Having trouble identifying independent and dependent variables. Here is the hypothesis: Ninth grade girls who are bullied have a lower gpa and higher absentee rate t
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