The degree of freedom is needed to determine the rejection region for statistical tests comparing continuous data The p-value is the probability that for a statistical model, a set of summarized data (test statistics) would be large enough as that which is observed by chance. a. both are true b. both are false c. first is true, second is false d. first is false, second is true

Suppose that a college determines the following distribution for X=number of courses taken by a full-time student this semester:    Value of X:  3       4       5          6 Probability 0.05.        0.25    0.27   a) The probability for X=4 is missing, What is it?    b) What is the average number of courses full-time students at this college take this semester? c) What is the standard deviation of the number of courses full-time students at this college take this semester. d) What is P(X>4.7)

2. Which of the following are practical ways to assess normality of the residuals? Select all that apply a. Normal probability plots (the R command is qqnorm() b. Anderson-Darling tests. c. Shapiro-Wilks tests. d. Boxplots e. Just ask if they are normal, or, guess, because, who really cares?

Answer all the questions Question: If a random sample of 40 is taken from each of the following distribution find the probability for each case that the sample mean exceeds 6.1 a. b. Business Statistics (1) X~ Po(6.4) Answes in 4 decimal place X~B(10,0.6)

A personality test has a subsection designed to assess the "honesty" of the test-taker. Suppose that you're interested in the mean score, µ, on this subsection among the general population. You decide that you'll use the mean of a random sample of scores on this subsection to estimate u. What is the minimum sample size needed in order for you to be 90% confident that your estimate is within 3 of u? Use the value 23 for the population standard deviation of scores on this subsection. Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.)

The management of a supermarket want to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. The expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. If the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?

#10 please

2.3 3 help please use diagram for answer with 5 part question (a-e) please thank you.

A personality test has a subsection designed to assess the "honesty" of the test-taker. Suppose that you're interested in the mean score, μ, on this subsection among the general population. You decide that you'll use the mean of a random sample of scores on this subsection to estimate μ. What is the minimum sample size needed in order for you to be 90% confident that your estimate is within 3 of μ? Use the value 23 for the population standard deviation of scores on this subsection. Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).

Q6. If the test statistic for a left-tailed test is z = –1.72, then P-value is 0.9518.a. Trueb. False