Question: A manager is interested in determining if the population standard deviation has dropped below 130. Based on a sample of n = 20 items selected

A manager is interested in determining if the population standard deviation has dropped below 130. Based on a sample of n = 20 items selected randomly from the population, conduct the appropriate hypothesis test at a 0.05 significance level. The sample standard deviation is 105.

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

If reject the null hypothesis Otherwise do not reject the null hypothesis T... 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

Students Have Also Explored These Related Statistics Questions!

Hickory Industries, a North Carolina-based firm, makes quality oak furniture (living room sets) and sells it to retailers throughout the eastern US. The firm is thinking about expanding to produce...

A manager is interested in determining if the population standard deviation has dropped below 130. Based on a sample of n = 20 items selected randomly from the population, conduct the appropriate...

A manager is interested in determining if the population standard deviation has dropped below 130. Based on a sample of n 20 items selected randomly from the population, conduct the appropriate...

I need help solving this mathematical question Question 3 The following sample data represent students scores in two replacement Math exams. Question 5 Let x represents the number of overweight men....

Hello, I need help with the following questions as I do not know how to answer them because we did'nt cover the topics in great depths in class with our teacher: Please find them attached below:...

Set Week 3: Chapters 3 & 4 Chapter 3: Complete the EVEN numbers problems listed below; the problem set begins on page 100 in Gravetter and Wallnau (2013). The answers to the odd numbered problems are...

Answer the following True/False, Multiple Choice, Fill in blank as QUICKLY AS POSSIBLE*. Please let them be correct answers. No explanation needed. 1 When conducting a one-sample t test, if a sample...

2. The prevalence rate of Hypertension among US adults is 30%. We plan to draw a random sample of 70 people from that population. What is the standard error of the sample proportion of hypertension?...

Location Income ($1,000) Urban 27 Rural 25 Suburban 25 Suburban 26 Rural 30 Urban 29 Rural 33 Urban 30 Suburban 32 Urban 34 Urban 35 Urban 40 Rural 30 Rural 33 Urban 42 Suburban 32 Urban 43 Urban 43...

1.SCENARIO 9-2 A student claims that he can correctly identify whether a person is a business major or an agriculture major by the way the person dresses. Suppose in actuality that if someone is a...

1 At many universities, students are assigned a grade of A, B, C, D, or F at the completion of each course. These letter grades are translated to 4, 3, 2, 1, and 0 grade (quality) points,...

1. Miracle Printers purchased for $700,000 a patent for a new laser printer. Although the patent gives legal protection for 20 years, it is expected to provide Miracle Printers with a competitive...

Lunar Inc. had developed a mechanism that harnessed heat from the sun. What the company lacked, however, was a method for storing the heat until it was needed. Trays-R-Us had developed a unique tray...

For a 2 - year bond ( par value = 1 0 0 0 ) with a 1 0 % coupon paid semiannually, the interest rate is also 1 0 % . ( Hint: with semiannual compounding, the Macaulay duration you find will be in...

A school has 20 teachers and 480 students. What is the teacher : student ratio in its simplest form?

The data for the 42 recent spills are saved in the accompanying file. a. Construct a 90% confidence interval for the difference between the mean spillage amount of accidents caused by collision and...

Do students who play virtual-reality educational software games perform better in school? If so, software designers will use this information to create more attractive and motivating educational...

Suppose the defendant in Problem 9.9 is presumed guilty until proven innocent. How do the null and alternative hypotheses differ from those in Problem 9.9? What are the meanings of the risks of...

If one unit of Product Z2 used $3.10 of direct materials and $3.60 of direct labor, sold for $10.00, and was assigned overhead at the rate of 36% of direct labor costs, how much gross profit was...

a. The Prepaid Insurance account shows a debit balance of $2,340, representing the cost of a three-year fire insurance policy that was purchased on October 1 of the current year b. The Office...

Based on predicted production of 25,200 units, a company budgets $270,000 of fixed costs and $277,200 of variable costs. If the company actually produces 18,100 units, what are the flexible budget...