Suppose X ∼N (-4,1. Between what xx values does 99.72% of the data lie?

75 out of 100 as a percentage

what is the mean when pi= 0.25 and n=40?

A large automobile insurance company selected samples of single and married male policyholders and recorded the number who made an insurance claim over the preceding three-year period. Z-value p-value Single Policyholders n₁ = 440 Number making claims = 88 a. Use a = 0.05. Test to determine whether the claim rates differ between single and married male policyholders. (to 2 decimals) (to 4 decimals) X Married Policyholders n2 = 840 Number making claims 126 We can conclude ✔ that there is the difference between claim rates. b. Provide a 95% confidence interval (to 4 decimals) for the difference between the proportions for the two populations. Enter negative answer as negative number. X * )

Question 14 of 14, Step 1 of 2 Suppose that you and a friend are playing cards and you decide to make a friendly wager. The bet is that you will draw two cards without replacement from a standard deck if both cards are diamonds, your friend will pay you $810. Otherwise, you have to pay your friend $49. Step 1 of 2: What is the expected value of your bet? Round your answer to two decimal places. Losses must be expressed as negative values. Answer winnens in new window) Tables Keypad Keyboard Shortcuts

Approximately 1.4% is not correct

what is the 95%CI upper and lower?

Question8

A sample of 150 married women determined that 127 are happy in their marriage. A sample of 150 married men determined that 76% are happy in their marriage.   If you plan to test if the percent of married women who are happy in their marriage is greater then the percent of married men who are happy in their marriage- Answer the following: What is the test statistic? Write to 4 decimal places.