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Tpy6a [65]
3 years ago
11

The mean percentage of a population of people eating out at least once a week is 57%, with a standard deviation of 3.5%. Assume

that a sample size of 40 people was surveyed from the population an infinite number of times. In which interval will 95% of the sample means occur?
Mathematics
1 answer:
Serhud [2]3 years ago
6 0
95% C.I. = mean + or - 1.96(standard deviation / sqrt(sample size))
95% C.I. = 57 + or - 1.96(3.5/sqrt(40) = 57 + or - 1.085 = 57 - 1.085 to 57 + 1.085 = 55.92 to 58.09

Therefore, 95% of the mean will occur in the interval 55.92 to 58.09
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I usually try and practice changing my mindset. Just try to look at things from another perspective, and if you can't, try thinking the OPPOSITE of what you thought.

Think homework is hard? Say to yourself, "Homework is easy." and trudge on through. After some time, your mindset *will* improve, and your attitudes will change from negative to positive.

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Step-by-step explanation:

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Step-by-step explanation:

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3 years ago
Need help on answering number 13.
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hodyreva [135]

Answer:

The answer to your question is: 16x + 3

Step-by-step explanation:

Step 1 :      f(x) = 8x² + 3x

                f(x +h) =  8(x + h)² + 3( x + h)

                f(x + h) = 8( x² + 2xh + h²) + 3( x + h)

                f (x + h) = 8x² + 16xh + 8h² + 3x + 3h

Step 2 f(x+h) - f(x) =  8x² + 16xh + 8h² + 3x + 3h - ( 8x² + 3x)

                              = 8x² + 16xh + 8h² + 3x + 3h - 8x² -3x

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Step 3 f(x + h) - f(x)/ h = h(16x + 8h + 3) /h

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Step 4 lim  f(x + h) - f(x)/ h = lim 16x + 8h + 3  = lim 16x + 8(0) + 3 = 16x + 3

        h ⇒0                           h ⇒0                     h ⇒0

3 0
3 years ago
Which graph shows y=x^2+3x-4
Ivahew [28]

Answer:

Third graph in the photo

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3 0
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