Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises suchas Candy Express, The Fudge Company, Karmel Corn, and Rocky Mountain Chocolate Factory. Startup costs (in thousands of dollars) for a random sample of candy stores are given below. Assumethat the population of x values has an approximately normal distribution.99 177 127 92 75 94116100 85n USE SALT(a) Use a calculator with mean and sample standard deviation keys to find the sample mean startup cost x and sample standard deviation s. (Round your answers to four decimal places.)x =thousand dollarsS =thousand dollars(b) Find a 90% confidence interval for the population average startup costs u for candy store franchises. (Round your answers to one decimal place.)lower limitthousand dollarsupper limitthousand dollars

Here sigma unknown and sample size also small so use t critical for confidence interval

Answered: P USE SALT (a) Use a calculator with…

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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A standardized exam's scores are normally distributed. In a recent year, the mean test score was 20.6 and the standard deviation was 5.6. The test scores of four students selected at random are 13, 23, 7, and 35. Find the z-scores that correspond to each value and determine whether any of the values are unusual. Question content area bottom Part 1 The z-score for 13 is (Round to two decimal places as needed.) Part 2 The z-score for 23 is (Round to two decimal places as needed.) Part 3 The z-score for 7 is (Round to two decimal places as needed.) Part 4 The z-score for 35 is (Round to two decimal places as needed.) Part 5 Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The unusual value(s) is/are (Use a comma to separate answers as needed.) B. None of the values are unusual.
PARTS A and B
(3.) A system contains components connected in parallel as shown in the diagram. If all components operate inderentently, & each component has probability 0.45 of failing What is the minimum number of components that must be connected in parallel so that th Probability that the system operateds exceeds 0.9999? The minimun number of components that must be connected in parallel is.
Number of Jobs A sociologist found that in a sample of 49 retired men, the average number of jobs they had during their lifetimes was 6.8 . The population standard deviation is 2.4 . Use a graphing calculator and round the answers to one decimal place. Part: 0 / 4 0 of 4 Parts Complete Part 1 of 4 The best point estimate of the mean is . ??
Please don't do handwritten and explain every concept , please i will definitely like, if you can't follow please skip...
Electricity bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $108.87 . Assume the amounts are normally distributed with standard deviation $18.00 . Use Excel to answer the following. Round the answer to four decimal places. Part: 0 / 3 0 of 3 Parts Complete Part 1 of 3 (a) What proportion of bills are greater than $134 ? The proportion of bills that are greater than $134 is . Part: 1 / 3 1 of 3 Parts Complete Part 2 of 3 (b) What proportion of bills are between $83 and $145 ? The proportion of bills that are between $83 and $145 is . Part: 2 / 3 2 of 3 Parts Complete Part 3 of 3 (c) What is the probability that a randomly selected household had a monthly bill less than $118 ? The probability that a randomly selected household had a monthly bill less…
Electricity bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $109.77 . Assume the amounts are normally distributed with standard deviation $22.00 . Use Excel to answer the following. Round the answer to four decimal places. Part: 0 / 3 0 of 3 Parts Complete Part 1 of 3 (a) What proportion of bills are greater than $137 ? The proportion of bills that are greater than $137 is.
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For data of discussion 1 refer to this picture What is the best point estimate for your survey question that you used in Discussion 1? Be sure to include both the correct notation (symbol) and the value. Construct a confidence interval for the responses to your survey. Assume that you do not know the population standard deviation. Indicate your level of confidence and the corresponding critical value. What is the margin of error? If we would increase the sample size to 500 students, what would happen to your margin of error?
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A mechanic sells a brand of automobile tire that has a life expectancy that is normally distributed, with a mean life of 36,000 miles and a standard deviation of 2100 miles. He wants to give a guarantee for free replacement of tires that don't wear well. How should he word his guarantee if he is willing to replace approximately 10% of the tires? Question content area bottom Part 1 Tires that wear out by enter your response here miles will be replaced free of charge.

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