For the function below, approximate the area under the curve on the specified interval as directed. 6x f(x) = on [1, 3] with 4 subintervals of equal width and left endpoints for sample points 2 + 4x² 398/192 (2.07) 301/198 (1.52) O 342/198 (1.73) O278/192 (1.40)

please help give neat and clean answer

What is the total area between the z-distribution and z-axis. P(z) Z-score Not enough information 1.0 Home | Chegg.cor None of these 0.05

Consider rolling a 6-sided die (a "D6") and counting the number of rolls up to and including the first "1" that appears. Imagine repeating that experiment 40 times and let X be the number of rolls taken on the j-th attempt. Consider the average A = 11/16 ( X ₁ + ... + +X40) 40 i. E(A) ii. Var(A)

Let X = number of errors per 500 lines of software code. Suppose it is known that E(X) = 4.11 and E(X²) = 17.63. What is Var(X)? Answer:

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. Single Policyholders Married Policyholders 721 = 575 n2 = 740 Number making claims = 115 Number making claims = 111 a. Use α = 0.05. Test to determine whether the claim rates differ between single and married male policyholders. z-value p-value We can conclude (to 2 decimals) X (to 4 decimals) 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.