A random sample of 20 observations selected from a normal population produced x 72 6 and s2 19 4 a Form a 90 confidence interval for m b Test H0 80 against Ha 80 Use 05 c Test H0 80 against Ha 80 Use 01 d Form a 99 confidence interval for m e How large a sample would be required to estimate to with...

a For confidence coefficient 90 10 and 2 05 From Table VI Appendix A with df n 1 20 1 19 t 05 1729 T ...

A random sample of 20 observations selected from a normal population produced x = 72.6 and s2

Question:

A random sample of 20 observations selected from a normal population produced x = 72.6 and s2 = 19.4.

a. Form a 90% confidence interval for m.

b. Test H0:µ= 80 against Ha: µ< 80. Use α = .05.

c. Test H0:µ= 80 against Ha: µ≠ 80. Use α = .01.

d. Form a 99% confidence interval for m.

e. How large a sample would be required to estimate µ to within 1 unit with 95% confidence?

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Statistics

ISBN: 9780321755933

12th Edition

Authors: James T. McClave, Terry T Sincich

See More Books

Question Posted: May 20, 2015 05:43 AM

See More Questions

A random sample of 20 observations gave the following summary statistics: xi = 234 and Xi2 = 3048. Assuming that the data may be looked upon as a random sample from a normal population, construct a...
A random sample of 20 undergraduate students receiving student loans was obtained, and the amount of their loans for the 20112012 school year was recorded. Use a normal probability plot to assess...
A random sample of 20 purchases showed the following amounts (in $): The mean was $45.26 and the standard deviation was $20.67. a) What is the standard error of the mean? b) How would the standard...
Ms. Esperanto obtained a $40,000 home equity loan at 7.5% compounded monthly. a. What will she pay monthly if the amortization period is 15 years? b. How much of the payment made at the end of the...
If Maxs income increases from $35 to $55 a day, how does his demand for rented windsurfing equipment change? Is windsurfing a normal good or an inferior good for Max? Explain.
Delta Company produces a single product. The cost of producing and selling a single unit of this product at the company's normal activity level of 105,600 units per year is: Direct materials Direct...
Examining the sensitivity of conclusions drawn from the QMDM to changes in the assumptions made by business appraisers.
Metallica Can Opener Company is a subsidiary of Maltz Appliances, Inc. The can opener that Metallica produces is in strong demand. Sales this year are expected to be 1,000,000 units. Full plant...
High Country, Incorporated produces and sells many recreational products. The company has just opened a new plant to produce a folding camp cot that will be marketed throughout the United States. The...
1. As the top managers of their company, what types of issues might Bert and John have to deal with? Be as specific as possible. Which management functions might be most important to them? Why? 2....
Specify the differences between a large-sample and small sample test of hypothesis about a population mean m. Focus on the assumptions and test statistics.
A random sample of 175 measurements possessed a mean of x = 8.2 and a standard deviation of s = .79. a. Form a 95% confidence interval for m. b. Test H0:= 8.3 against Ha: 8.3. Use = .05. c. Test...
In Exercises use the graph to estimate the open intervals on which the function is increasing or decreasing. Then find the open intervals analytically. f(x) = x - 2x 3 2 1 y 2
Prevosti Farms and Sugarhouse pays its employees according to their job classification. The following employees make up Sugarhouse's staff: Payroll Payroll Register Register Thomas Avery Towle...
Name: Course: Worksheet Lab Experience 5 Logic Circuits (A) Exercise 5.1 Truth table for the example circuit A B Output Value 0 0 1 1 0 1 1 Exercise 5.2 A slight change in the example circuit...
Stanley Medical Hospital is a non-profit and a non-chartered hospital planning to acquire several hospitals in the area. The hospital is researching financial options since they want to expand into...
Tony and Suzie see the need for a rugged all-terrain vehicle to transport participants and supplies. They decide to purchase a used Suburban on July 1, 2022, for $12,000. They expect to use the...
Pacifico Company, a US-based importer of beer and wine, purchased 1,800 cases of Oktoberfest-style beer from a German supplier for 522,000 euros. Relevant U.S. dollar exchange rates for the euro are...
A summing amplifier can be used as a digital-to-analog converter (DAC). An example of a 4-bit DAC is shown in Figure P9.37. When switch $S_{3}$ is connected to the $-5 \mathrm{~V}$ supply, the...
Burberrys competitive advantage is through its differentiation strategy. What risk should Burberry remain aware of?
Determine the steady-state responses of each of the masses of the system in Figure P9.7. Use the method of undetermined coefficients. 500 N/m w 20 N s/m FIGURE P9.7 5 kg X1 10 sin50t 100 N/m 200 N/m...
(a) Find P (T < 2.3G5) when v = 7. (b) Find P (T > 1.318) when v = 24. (c) Find F (1.356 < T < 2.179) when v = 12. (d) Find P (T > 2.567) when r = 17.
(a) Find P( t0.005 < T < t0.01) for v = 20. (b) Find P(T> -t0.025).
Given a random sample of size 24 from a normal distribution, find k such that (a) P (2.069 < T < k) = 0.965; (b) P {k < T < 2.807) = 0.095; (c) P ( k < T < k) = 0.90.
Management makes many judgements and estimates in preparing accounts, some of which will have a significant effect on the reported results and financial position. Give examples of ZAIN estimates and...
What is the NPV of a project with an initial investment of $350,000 and annual cash inflows of $150,000 for the next 10 years? Cost of capital is 13% A $436,721.21 B $442,901.59 C $452,932.43 D...
Journal DATE DESCRIPTION POST. REF. DEBIT CREDIT 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Joumalize the entries for the following transactions. Refer to the Chart of Accounts for exact wording of...

A random sample of 20 observations selected from a normal population produced x = 72.6 and s2

Question:

Step by Step Answer:

a For confidence coefficient 90 10 and 2 05 From Table VI Appendix A with df n 1 20 1 19 t 05 1729 T...View the full answer

Statistics

Students also viewed these Statistics questions