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2 years ago

PLEASE HELP ITS URGENT DONT GUESS (also if you get it right ill mark you as brainliest)

Mathematics

1 answer:

max2010maxim [7]2 years ago

5 0

Answer:

106.83ft

Step-by-step explanation:

29 + 29 + 19 = 77ft

Now we must calculate the semicircle, The diameter is 19ft

19ft x 3.14 = 59.66

since 59.66 would be a full circle, you divide it in half.

59.66/2=29.83

77+29.83=106.83ft

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2 years ago

The College Student Journal (December 1992) investigated differences in traditional and nontraditional students, where nontradit

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Answer:

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Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

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$Z = \frac{X - \mu}{\sigma}$

After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X. Subtracting 1 by the pvalue, we This p-value is the probability that the value of the measure is greater than X.

For this problem, we have that:

Based on the study results, we can assume the population mean and standard deviation for the GPA of nontraditional students is $\mu = 3.5$ and $\sigma = 0.5$ .

We have a sample of 100 students, so we need to find the standard deviation of the sample, to use in the place of $\sigma$ in the z score formula.

$s = \frac{\sigma}{\sqrt{100}} = \frac{0.5}{10} = 0.05$ .

What is the probability that the random sample of 100 nontraditional students have a mean GPA greater than 3.65?

This is 1 subtracted by the pvalue of Z when $X = 3.65$ . So

$Z = \frac{X - \mu}{s}$

$Z = \frac{3.65 - 3.50}{0.05}$

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A zscore of 3 has a pvalue of 0.9987.

So, there is a 1-0.9987 = 0.0013 = 0.13% probability that the random sample of 100 nontraditional students have a mean GPA greater than 3.65.

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