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Alex Ar [27]
3 years ago
5

Suppose that a travel bureau claims that the trees in a forest are 85 feet tall

Mathematics
2 answers:
Furkat [3]3 years ago
7 0

Answer

A. 84.4

Step-by-step explanation:

sesenic [268]3 years ago
3 0

Answer:B 84.6 is the right answer

Step-by-step explanation:

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The points obtained by students of a class in a test are normally distributed with a mean of 60 points and a standard deviation
Paraphin [41]

Answer:

0.13% of students have scored less than 45 points

Step-by-step explanation:

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

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. 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, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 60, \sigma = 5

About what percent of students have scored less than 45 points?

This is the pvalue of Z when X = 45. So

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

Z = \frac{45 - 60}{5}

Z = -3

Z = -3 has a pvalue of 0.0013

0.13% of students have scored less than 45 points

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3 years ago
What is the best expression for 17/4
balu736 [363]

Answer:

4 1/4

Step-by-step explanation:

This is the best expression or the best simplyfied version.

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Your given question is unclear.

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A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is
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Solution B is the one she should use
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Hii Please Answer ASAP and only if you know the answer! :P I will give brainliest to right answer!! :)
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Answer:

Step-by-step explanation:

Here so u can give that person brainliest

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