For the given data. Find 24, 26, 23, 25, 27

You are to pick a month from a non-leap year. What is the variance of number of days of the month? [Give your answer upto 2 decimal places]   In details

Suppose that you have a hat that contains slips of paper. Each slip of paper has a single number from 1-5 written on it. There are as many slips of paper with a given number as the square of that number, so 16 slips with the number 4, 9 slips with the number 3, and so on. A person is selected to draw a number at random from the hat. Let the random variable X = the number drawn from the hat. Find the mean and the variance of X

-Please do on excel and write the excel fomula for each answer you give. I cannot figure this question out.  A business school has a goal that the average number of years of work experience of its MBA applicants is more than three years. Historical data suggest that the variance has been constant at around six months, and thus, the population variance can be assumed to be known. Based on last year’s applicants, it was found that among a sample of 47, the average number of years of work experience is 3.1. Can the school state emphatically that it is meeting its goal? Formulate the appropriate hypothesis test and con-duct the test.

X is quarterly Covid-19 cases in an inner city hospital Quarter Quarter Quarter Quarter A C 130 18 90 25 What is the sample mean and variance (in that order)?

Professor A teaches two sections of Math 2526. These two sections use a common final exam. The number of students, the average score for final exam, and the standard deviation for the two sections are: 20, 85, 10; 15, 80, 9, respectively. Find the pooled variance of these two sections. 1 91.9 2 90.25 3 181 4 94.5

A sample of n = 4 scores has a sum of squares = 60. What is the variance of these scores?       20     15     60     30

Which of the following not used in an F-ratio for the two-factor analysis of variance?​ ​MSA   ​MSAxB   ​MSbetween treatments   ​MSwithin treatments

What is the answer to this question? How to get the answer? Thanks!

Give an explanation why this statement is either true or false:   Portfolio contains n assets. Therefore, portfolio variance for this portfolio is the function of 2n covariances and n variances.