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Bas_tet [7]
3 years ago
15

PLEASE HELP I NEED THIS NOW PLEASE PLEASE PLEASE PLEASE PLEASEEEEE

Mathematics
2 answers:
valina [46]3 years ago
8 0

Answer:

3

Step-by-step explanation:

the top and bottom the two left and right top and two left and right bottom

Law Incorporation [45]3 years ago
4 0

Answer:

3

Step-by-step explanation:

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Suppose your statistics professor reports test grades as​ z-scores, and you got a score of 2.49 on an exam. ​(a) Write a sentenc
Oduvanchick [21]

Answer:

a) A z-score of 2.49 means that your grade was 2.49 standard deviations above the mean of all grades.

b) 1.39% of the class scored lower than your​ friend.

Step-by-step explanation:

Problems of normally distributed samples are 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.

You got a score of 2.49 on an exam. ​

(a) Write a sentence explaining what that means

A z-score of 2.49 means that your grade was 2.49 standard deviations above the mean of all grades.

(b) Your friend got a​ z-score of negative 2−2. If the grades satisfy the Nearly Normal​ Condition, about what percent of the class scored lower than your​ friend? ​

This percentage is the pvalue of Z = -2.2

So 0.0139 = 1.39% of the class scored lower than your​ friend.

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What is 392,153 rounded to the nearest ten thousand
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Step-by-step explanation:

392,153 rounded to the nearest ten thousand is 390,000

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C= 2πr

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C= 2×22/7 × 10.3

C= 64.74 feet

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