Question: The average wait time on the phone for taxpayers calling the IRS in 2012 was 1,080 seconds. Suppose (if you can use your imagination) that

The average wait time on the phone for taxpayers calling the IRS in 2012 was 1,080 seconds. Suppose (if you can use your imagination) that the IRS made operational changes in an effort to reduce wait times during 2013. To test the effectiveness of these changes, a random sample of 50 phone calls was selected and the wait time of each call was recorded. Assume the standard deviation for the wait time is 250 seconds.

a. Explain in your own words how Type I and Type II errors can occur in this hypothesis test.

b. Using σ = 0.02, calculate the probability of a Type II error occurring if the actual average wait time per call is 1,014 seconds.

c. Using σ = 0.02, calculate the probability of a Type II error occurring if the actual average wait time per call is 960 seconds.

d. Explain the differences in the results you calculated in parts b and c.

Step by Step Solution

★★★★★

3.55 Rating (165 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

a H 0 1080 secondsH 1 10075Pz018 ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

483-M-S-H-T (1464).docx

120 KBs Word File

Students Have Also Explored These Related Statistics Questions!

Explain in your own words how tools such as master scheduling, MRP, and DRP can be used to coordinate activity up and down a supply chain. For example, what information might we share with our...

A random sample of 50 personal property insurance policies showed the following number of claims over the past 2 years. a. Find the mean number of claims per policy. b. Find the sample variance and...

A random sample of 50 students was asked what salary the college should be prepared to pay to attract the right individual to coach the football team. An independent random sample of 50 faculty...

show the easiest steps 9.EOC.44-E Question Helpv , 0 According to a 2016 report, 40% of 18-to-20-yearold students use credit cards for everyday purchases. Suppose a local bank believes that this...

lLCU Lll FISH. Lb U dill-.1 L. 9.59 The average wait time on the phone for taxpayers calling the IRS in 2015 was 1,380 seconds. Suppose (if you can use your imagination) that the IRS made operational...

The average wait time on the phone for taxpayers calling the IRS in 2015 was 1,380 seconds. Suppose (if you can use your imagination) that the IRS made operational changes in an effort to reduce wait...

Please Help with this Hypothetical 1065 Tax Return.. Form 1065 Due Thursday, November 12 by 5:00 PM CST US Check Figures - Form 1065 Page 1, Line 22 (Ordinary Business Income) - $156,275 Page 5, Line...

1 (1 point) You own a small storefront retail business and are interested in determining the average amount of money a typical customer spends per visit to your store. You take a random sample over...

Using the U.S. Securities and Exchange Commission?s EDGAR database, select a public company that has consolidated subsidiaries. To minimize the chances of classmates selecting the same company,...

How did the Sarbanes-Oxley Act address corporate governance and public accounting responsibilities?

Big C cable is a monopoly that can offer cable packages with different number of channels at different monthly fees. The marginal cost of providing an additional TV channel is c = 0. Let p be the...

Determine the center and radius of the circle described by the equation. ( x + 5 ) ^ ( 2 ) + ( y - 3 ) ^ ( 2 ) = 3 6

The AMAX Company purchased land several years ago for $60,000 as a potential site for a new building. No building has yet been constructed. A comparable lot near the site was recently sold for...

A detailed study of Americans religious beliefs and practices by the Pew Forum on Religion & Public Life revealed that religion is quite important in an individuals life (Boston Globe, June 24,...

A University of Utah study examined 7,925 severely obese adults who had gastric bypass surgery and an identical number of people who did not have the surgery (Boston Globe, August 23, 2007). The...

A sample space S yields five equally likely events, A, B, C, D, and E. a. Find P(D) . b. Find P(Bc) . c. Find P(A C E) .

New Project Analysis The president of the company you work for has asked you to evaluate the proposed acquisition of a new chromatograph for the firms R&D department The equipment's basic price is...

2009 2010 Sales ($ millions) 1000 1112 Cost of Goods Sold ($ millions) 500 556 Other Expenses ($ millions) 100 111 Depreciation ($ millions) 100 100 Interest Expense ($ millions) 50 55 Total Current...

It appears that the per capita income elasticity of demand for natural gas is less than 1.0. a} If this is true, what term would we use to characterize the demand for natural gas? 1)) Using a 0.05...