**6.7**A grocery supermarket chain is considering an outlet near a new middle-income housing development. They want to be certain that the average income is above $42,000 per year. A random sample of 36 families from the development gives a mean income of $43,500 per year with a standard deviation of $900 per year. Should they establish the outlet? Justify your answer using a 2% level of significance.

Here, mean is 43500 standard deviation is 900 and sample is 36. Population mean is 42000. We will…

Answered: **6.7** A grocery supermarket chain is…

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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One-Way Airfares The average one-way airfare from Pittsburgh to Washington D.C. is $236. A random sample of 19 one-way fares during a particular month had a mean of $208 with a standard deviation of $43. At α=0.05, is there sufficient evidence to conclude a difference from the stated mean?
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Moviegoers The average "moviegoer" sees 8.5 movies a year. A moviegoer is defined as a person who sees at least one movie in a theater in a 12-month period. A random sample of 42 moviegoers from a large university revealed that the average number of movies seen per person was 10.2. The population standard deviation is 3.2 movies. At the 0.01 level of significance, can it be concluded that this represents a difference from the national average? Part 1 of 5 State the hypotheses and identify the claim with the correct hypothesis. Hotu = 85 Part: 1/5 not claim H₁ 8.5 claim This hypothesis test is a two-tailed ▼test. Part 2 of 5 ▼ ▼ Find the critical value(s). Round the answer to at least two decimal places. If there is more than one critical value, separate them with commas. Critical value(s): X 0.0.... + 8分民图〗b. E
test statistic value. show solution.
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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 34 new homes indicated that the mean cost was $120.61and the standard deviation was $17. Can it be concluded that the mean cost differs from $117.91, using the 0.10level of significance? Use the P-value method. Use a graphing calculator. (b) Find the P-value. Round the answer to at least four decimal places. P-value=
The weights of corn grew on a farm has a mean of 23 ounces and has a standard deviation of 3 ounces. A sample of the corn grown was selected, and the weights of the selected boxes are summarized in the histogram shown. 32 28 24 16 18 19 20 21 22 23 24 25 26 27 28 Weights of the corn ears Part A: How many corns have weights that are more than 1 standard deviation above the mean? Part B: How many corns have weights that are more than 1 standard deviations below the mean? Number of ear of corns
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=
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