FREE Trial
Answered step by step
Verified Expert Solution
Link Copied!

Question

1 Approved Answer

The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kWh per day Assume that the population standard

 The electric cooperative needs to know the mean household usage of electricity by its non-commercial customers in kWh per day Assume that the population standard deviation is 16 kWh The mean electricity usage per family was found to be 147 kWh per day for a sample of 417 families Construct the 85% confidence interval for the mean usage of electricity.

Step by Step Solution

★★★★★

3.55 Rating (155 Votes )

There are 3 Steps involved in it

Step: 1

At 80 confidence interval the critical value ... blur-text-image

Get Instant Access to Expert-Tailored Solutions

See step-by-step solutions with expert insights and AI powered tools for academic success

Step: 2

blur-text-image

Step: 3

blur-text-image

Ace Your Homework with AI

Get the answers you need in no time with our AI-driven, step-by-step assistance

Get Started

Recommended Textbook for

Elementary Statistics

Elementary Statistics

Authors: Neil A. Weiss

8th Edition

321691237, 978-0321691231

More Books

Students also viewed these Accounting questions

Question

★★★★★
In each part, assume that the population standard deviation is known. Decide whether use of the z-interval procedure to obtain a confidence interval for the population mean is reasonable. Explain...

Answered: 1 week ago

Question

★★★★★
In each part, assume that the population standard deviation is known. Decide whether use of the z-interval procedure to obtain a confidence interval for the population mean is reasonable. Explain...

Answered: 1 week ago

Question

★★★★★
Atkin Corporation provides the following account balances for 2020 and 2021: December 21 December 20 Accounts receivable 138,000 96,000 Inventories 206,000 168,000 Accounts payable 90,000 68,000...

Answered: 1 week ago

Question

★★★★★
Write the shear and momentfunctions and draw shear and moment diagrams for the following frames: (a) Support A is a roller, B and C are fixed and support C is a pin.

Answered: 1 week ago

Question

★★★★★
No glass is perfectly transparent. Mainly because of reflections, about 92% of light passes through an average sheet of clear windowpane. The 8% loss is not noticed through a single sheet, but...

Answered: 1 week ago

Question

★★★★★
Glyptal resin makes a strong, solid polymer matrix for electronic parts. Glyptal is made from terephthalic acid and glycerol. Draw the structure of Glyptal, and explain its remarkable strength and...

Answered: 1 week ago

Question

★★★★★
The MINITAB output given in Figure 8.38 resulted from fitting the model Density = ????0 + ????1BMI + ???? Use the MINITAB output given in Figure 8.38 to answer the following questions. (a) What is...

Answered: 1 week ago

Question

★★★★★
Cardinal Company is considering an investment expected to generate an average net income after taxes of $1,300 for three years. The investment costs $30,000 and has an estimated $4,000 salvage value...

Answered: 1 week ago

Question

★★★★★
p For many years, Manama Corporation has used a straightforward absorption costing approach to cost-plus pricing, with a markup percentage of 20%. It has recently lost considerable business to...

Answered: 1 week ago

Question

★★★★★
The following is the text for an opinion on internal control for W Company, an issuer. Some words or phrases have been replaced with numbers (e.g., [1], [2], etc.). Select from the option list...

Answered: 1 week ago

Question

★★★★★
A Georgia Pacific paper mill daily inspects and tracks the number of defects found in each sample of paper. What is the appropriate type of control chart to monitor this quality characteristic? O...

Answered: 1 week ago

Question

★★★★★
1. Your friend asks you to invest $10,000 in a business venture. Based on your estimates, you would receive nothing for four years, at the end of year 5 you would receive interest on the investment...

Answered: 1 week ago

Question

★★★★★
1 ) A global contracting organisation suffers from different types of organisational conflicts internally and within its clients and supply chain. You are appointed as a consultant to advise senior...

Answered: 1 week ago

Question

★★★★★
Jose own a small retail store and hires Sam as his agent to manage the store while he is away on vacation. Jose instructs Sam to only sell items at a 10% discount. However, Sam mistakenly sells a...

Answered: 1 week ago

Question

★★★★★
In South Africa, while excessive, deadly, or lethal use of force tends to be associated more often with the SAPS, private security officers have also been guilty of such activities. This connotation...

Answered: 1 week ago

Question

★★★★★
7) Bright Semiconductor specializes in semiconductors that are used in autos, communication equipment, and industrial machinery, which are cyclical industries. This high-yield-rated company's debt...

Answered: 1 week ago

Question

★★★★★
answer b The intangible assets section of Novak Corp's balance sheet at December 31, 2022, is presented here. The patent was acquired in January 2022 and has a useful life of 10 years. The copyright...

Answered: 1 week ago

Question

★★★★★
A stock has had returns of 8 percent, 26 percent, 14 percent, 17 percent, 31 percent, and 1 percent over the last six years. What are the arithmetic and geometric average returns for the stock?

Answered: 1 week ago

Question

★★★★★
x = 10, n = 40, 90% level. We have given the number of successes and the sample size for a simple random sample from a population. In each case, do the following tasks. a. Determine the sample...

Answered: 1 week ago

Question

★★★★★
1, 9, 8, 4, 3 3. a. Population mean. b. Population standard deviation.

Answered: 1 week ago

Question

★★★★★
S. Parker et al. analyzed the labor supply of self-employed individuals in the article "Wage Uncertainty and the Labour Supply of Self-Employed Workers" (The Economic Journal, Vol. 118, No. 502, pp....

Answered: 1 week ago

Question

★★★★★
The following information is based on independent random samples taken from two normally distributed populations having equal variances: Based on the sample information, determine the 95% confidence...

Answered: 1 week ago

Question

★★★★★
A decision maker wishes to test the following null and alternative hypotheses using an alpha level equal to 0.05: The population standard deviations are assumed to be known. After collecting the...

Answered: 1 week ago

Question

★★★★★
The owner of the A.J. Fitness Center is interested in estimating the difference in mean years that female members have been with the club compared with male members. He wishes to develop a 95%...

Answered: 1 week ago

Previous Question Next Question