A car insurance company would like to determine the proportion of accident claims covered by the company. According to a preliminary estimate, 60 percent of the claims are covered. How large a sample should be taken to estimate the proportion of accident claims covered by the company if we want to be 98 percent confident that the sample percentage is within ±3 percent of the actual percentage of the accidents covered by the insurance company?

In a study of the accuracy of fast food​ drive-through orders, Restaurant A had 284 accurate orders and 67 that were not accurate. a. Construct a 90​% confidence interval estimate of the percentage of orders that are not accurate. b. Compare the results from part​ (a) to this 90​% confidence interval for the percentage of orders that are not accurate at Restaurant​ B: 0.172 < p< 0.237. What do you​ conclude? Please help.

The arsenic in a 1.233-g sample of a pesticide was converted to H3AsO4 by suitable treatment. The acid was then neutralized, and 41.00 mL of 0.05819 M AgNO3 was added to precipitate the arsenic quantitatively as Ag3AsO4. The excess Ag+ in the filtrate and in the washings from the precipitate was titrated with 9.89 mL of 0.1000 M KSCN, and the reaction was Ag+ + SCN- ---> AgSCN (s)

Find the percentage of As2O3 in the sample.

Percentage of As2O3 = ____%

In a study of the accuracy of fast food​ drive-through orders, Restaurant A had

330330

accurate orders and

7474

that were not accurate.

a. Construct a

9090​%

confidence interval estimate of the percentage of orders that are not accurate.

b. Compare the results from part​ (a) to this

9090​%

confidence interval for the percentage of orders that are not accurate at Restaurant​ B:

0.1710.171less than<pless than<0.2320.232.

What do you​ conclude?

A measure of the adhesiveness of honey can be modeled as

f(x.y) = -125.48 + 4.26x + 4.85y -0.05x^2 - 0.14y^2

where x is the percentage of glucose and maltose and y is the percentage of moisture.

(a) calculate the absolute maximum of the adhesiveness of honey.

(b) the FDA restrictions for Grade A honey require that the combined percentages of glucose, maltose, and moisture equals 58%, what is the maximum measure of adhesiveness possible?

. A Pew Research Center poll asked randomly selected subjects if they agreed with the statement that “It is morally wrong for married people to have an affair.” Among the 386 women surveyed, 347 agreed with the statement. Among the 359 men surveyed, 312 agreed with the statement. Use a 0.05 significance level to test the claim that the percentage of women who agree is the same as the percentage of men who agree.

1. Consider a 30-year U.S. bond paying 8 percent coupon. The interest is 10 percent.

1. Find the bond’s Macaulay duration?
2. Find the bond’s Modified duration.?
3. If the interest rate falls by 10 basis points, what is the exact percentage change in the bond price?
4. If the interest rate falls by 10 basis points, what is the approximate percentage change in the bond price?