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ladessa [460]
4 years ago
10

Construct the 95% confidence interval for the population mean using the appropriate distributions. a. A random sample of 50 peop

le’s body mass index has a mean of 27.7 and a standard deviation of 6.12. b. The average yards per carry among all NFL
Mathematics
1 answer:
SSSSS [86.1K]4 years ago
4 0

Answer: 95% confidence interval would be (26.01,29.39).

Step-by-step explanation:

Since we have given that

n = 50

Mean = 27.7

Standard deviation = 6.12

We need to construct 95% confidence interval for the population.

so, z = 1.96

So, it becomes,

\bar{x}\pm z\times \dfrac{\sigma}{\sqrt{n}}\\\\=27.7\pm 1.96\times \dfrac{6.12}{\sqrt{50}}\\\\=27.7 \pm 1.69\\\\=(27.7-1.69,27.7+1.69)\\\\=(26.01,29.39)

Hence, 95% confidence interval would be (26.01,29.39).

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A mixed number is a whole number plus a fraction.
the smallest whole number is 1.
so no mixed number could be lees than 1.

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For the polynomial shown below find f(1).<br><br><br>f(x)=3x^4-x^2+4x-2
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Answer:

f(1)=4

Step-by-step explanation:

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7/2 + x/2 = -5x + 5/3 <br><br> solve for x
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2 years ago
A company has budgeted 5 1/4 hours to complete a project, with 1/3 of the time spent on research. How much time does the company
elena-s [515]

Given that a company budgeted 5 1/4 hours to complete a project, determine how much time they spent on research if they spent 1/3 of the total budget.

First, convert the budget from hours into minutes.

5 1/4 hours = 315 minutes

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1/4 hour = 15 min

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Lastly convert to a mixed number.

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