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Scorpion4ik [409]
3 years ago
11

Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you ca

n probably get a bank loan on startup costs for franchises such as 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. Assume that the population of x values has an approximately normal distribution. 96 171 128 92 75 94 116 100 85 (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 one decimal place.) x = 106.3 Correct: Your answer is correct. thousand dollars s = 28.9 Correct: Your answer is correct. thousand dollars (b) Find a 90% confidence interval for the population average startup costs μ for candy store franchises. (Round your answers to one decimal place.) lower limit thousand dollars upper limit thousand dollars
Mathematics
1 answer:
icang [17]3 years ago
3 0

Answer:

approximately normal distribution.

95

171

134

91

75

94

116

100

85

x bar=106.8

s=29.6

(b) Find a 90% confidence interval for the population average startup costs μ for candy store franchises. (Round your answers to one decimal place.)

lower limit?    

upper limit?

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

I find this approach the most straightforward of the various ways that trinomial factoring is explained or diagramed.

You want two factors of "ac" that have a total of "b". Here, that means you want factors of 2·50 = 100 that have a total of 25. It is helpful to know your times tables.

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The trinomial can be rewritten using these factors as ...

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<em>Additional comment</em>

It doesn't matter which of the factors of the pair you write first. If our rewrite were ...

  2x^2 +20x +5x +50

Then the grouping and factoring would be (2x^2 +20x) +(5x +50)

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