2. According to the National Association of Home Builders, the average cost of building ahome in the Northeast is $ 117.91 per square foot. A random sample of 36 new homesindicated that the mean cost was $122.57 and the standard deviation was $20. Can it beconcluded that the mean cost differs from SI17.91, using 0.10 level of significance?i. Ho:Ha:ii. Do a-test at a=iii.Decision Rule: Reject Ho ifiv.Computations

Given : Sample size (n) = 36 Sample mean (X¯) = $122.57 Sample SD (S) = $20 Significance level (α) =…

Answered: 2. According to the National…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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1. Studies show that gasoline use for cars is normally distributed, with a mean of 25.5 miles per gallon (mpg) and a standard deviation of 4.5 mpg. What percentage of compacts get A. 30 mpg or more? B. between 20 and 28? C. less than 24 mpg? 2. An electrical firm manufactures incandescent light bulbs that have a length of life (in hours) that is normally distributed. If the mean and standard deviation length of life of all lightbulbs produced are 1250 hours and 300 hours respectively, find the probability that a randomly selected bulb will last less than 1100 hours.
2. According to the National Association of Home Builders, the average cost of building a home in the Northeast is $ 117.91 per square foot. A random sample of 36 new homes indicated that the mean cost was $122.57 and the standard deviation was $20. Can it be concluded that the mean cost differs from $117.91, using 0.10 level of significance? i. Ho: Ha: ii. Do a -test at a iii. Decision Rule: Reject Ho if iv. Computations
I need help with a., b., c., and d.
i need C and D
A bottled water distributor wants to determine whether the mean amount of water contained in 1-gallon bottles purchased from a nationally known water bottling company is actually 1 gallon. You know from the water bottling company specifications that the standard deviation of the amount of water is 0.03 gallon. You select a random sample of 45 bottles, and the mean amount of water per 1-gallon bottle is 0.994 gallon. Complete parts (a) through (d) below. 1.96,-1.96 (Round to two decimal places as needed. Use a comma to separate answers as needed.) What is the final conclusion? A. Fail to reject Ho. There is not sufficient evidence that the mean amount is different from 1.0 gallon. OB. Reject Ho. There is not sufficient evidence to warrant rejection of the claim that the mean amount is different from 1.0 gallon. OC. Reject Ho. There is sufficient evidence to warrant rejection of the claim that the mean amount is different from 1.0 gallon. D. Fail to reject Ho. There is sufficient…
Which is cheaper: eating out or dining in? The mean cost of a steak, salad, and rice bought at the grocery store is $13.04. A sample of 30 neighborhood restaurants showed a mean price of $12.15 and a standard deviation of $2 for a comparable restaurant meal. 1.1) Develop appropriate hypotheses for a test to determine whether the sample data support the conclusion that the mean cost of a restaurant meal is less than $13.04. 1.2) At alpha = 0.05, what is your conclusion? Show a detailed solution to support your conclusion. (Find p-values at: https://www.socscistatistics.com/pvalues/tdistribution.aspx)
15
Cost of Building a Home According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91 per square foot. A random sample of 42 new homes indicated that the mean cost was $123.87 and the standard deviation was $15. Can it be concluded that the mean cost differs from $117.91, using the 0.05 level of significance? Use the P-value method. Use a graphing calculator. Find the P-value. Round the answer to at least four decimal places. P-value=
The average cost of tuition, room and board at small private liberal arts colleges is reported to be $8,500 per term, but a financial administrator believes that the average cost is higher. A study conducted using 350 small liberal arts colleges showed that the average cost per term is $8,745 with a standard deviation of $1,200. Let = 0.05., what is our decision about the average cost? Select one: a.Less than $8,500 b.Greater than 8500 c.None is correct d.Not equal to $8,500 e.Equal to $8,500
3)A recent survey indicated that the average amount spent for breakfast by business managers was $8.0 with a standard deviation of $2.5. It was felt that breakfasts on the West Coast were higher than $8.0. A sample of 81 business managers on the West Coast had an average breakfast cost of $8.5. Find the P-value for the test. A 0.0319 B. 0.9641 C 0.0359 D. 0.2734

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