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stiv31 [10]
2 years ago
14

Need help on this! Maybe be marked brainliest?

Mathematics
1 answer:
Elena-2011 [213]2 years ago
8 0

Answer: NEED THE QUESTION FIRST

Step-by-step explanation:

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4. The distribution of blood cholesterol level in the population of young men aged 20 to 34 years is close to Normal, with mean
Pie

Answer:

a) 38.59% probability that a young man (aged 20 to 34) has a cholesterol level greater than 200 milligrams per deciliter.

b) By the Central Limit Theorem, the mean of the distribution of the sample mean would be 188 milligrams per deciliter

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.

In this problem, we have that:

\mu = 188, \sigma = 41

a. Find the probability that a young man (aged 20 to 34) has a cholesterol level greater than 200 milligrams per deciliter.

This is 1 subtracted by the pvalue of Z when X = 200. So

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

Z = \frac{200 - 188}{41}

Z = 0.29

Z = 0.29 has a pvalue of 0.6141

1 - 0.6141 = 0.3859

38.59% probability that a young man (aged 20 to 34) has a cholesterol level greater than 200 milligrams per deciliter.

b. Suppose you measure the cholesterol level of 100 young men chosen at random and calculate the sample mean. If you did this many times, i. what would be the mean of the distribution of the sample mean

By the Central Limit Theorem, the mean of the distribution of the sample mean would be 188 milligrams per deciliter

5 0
2 years ago
Simplify the expression given below 1/2x^2-4x-2/x
Alex787 [66]

Answer:

We need to simplify the following expressio:

\frac{1}{2} x^{2}- 4x-\frac{2}{x}

Multiply the whole expression by '2x':

x^{3}-8x^{2}-4

The expression can't be more simplified.

7 0
3 years ago
Which has a faster average grade 200 m and 25.98 seconds or 100 m in 12.54 Seconds
olga nikolaevna [1]
100 m in 2.54 sec. because the least the number is is the greatest if you do not understand sorry i might be explaining it wrong but I know that my answer is right
8 0
2 years ago
The entrance fee at Purple Dinosaur Carnival was $4.00, and each ride cost $0.80. The entrance fee at Unicorn Carnival was $12.0
Natali5045456 [20]

Answer:

D

Step-by-step explanation:

i had that question

5 0
2 years ago
Which best defines a compare and contrast text structure? Compare and contrast texts demonstrate the similarities and difference
Ann [662]

Answer:

A) Compare and contrast texts demonstrate the similarities and differences between two or more topics

Step-by-step explanation:

<u>Compare and Contrast</u> is a text structure (or pattern of organization) where the similarities and differences of two or more things is discussed/explored.

7 0
2 years ago
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