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yaroslaw [1]
2 years ago
5

How do I do question 5. ?

Mathematics
1 answer:
-BARSIC- [3]2 years ago
4 0
The first one shown, 400/2, is showing the point on the graph where she walks 400 ft in 2 minutes. In order to find the next proportion, you just have to look two minutes over which in this case is 800 ft for 4 minutes... written 800 over 4.
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A manufacturer has designed a process to produce pipes that are 10 feet long. The distribution of the pipe length, however, is a
Lina20 [59]

Answer:

first of all, this person is a hacker, their malicious files will destroy your computer

Step-by-step explanation:

B is the answer I think

8 0
3 years ago
The mean height of women in a country (ages 20-29) is 64 4 inches A random sample of 50 women in this age group is selected What
Simora [160]

Answer:

0.0721 = 7.21% probability that the mean height for the sample is greater than 65 inches.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Mean of 64.4 inches, standard deviation of 2.91

This means that \mu = 64.4, \sigma = 2.91

Sample of 50 women

This means that n = 50, s = \frac{2.91}{\sqrt{50}}

What is the probability that the mean height for the sample is greater than 65 inches?

This is 1 subtracted by the p-value of Z when X = 65. So

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

By the Central Limit Theorem

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

Z = \frac{65 - 64.4}{\frac{2.91}{\sqrt{50}}}

Z = 1.46

Z = 1.46 has a p-value of 0.9279

1 - 0.9279 = 0.0721

0.0721 = 7.21% probability that the mean height for the sample is greater than 65 inches.

8 0
2 years ago
Can Someone Please Help Me With This Question. I'll post a picture of the question ​
Vedmedyk [2.9K]

Answer:

y-7=3(x-9)

Step-by-step explanation:

The form of equation of line given in the problem is the point-slope form of a line. That is given by:

y-y_1=m(x-x_1)

We need y_1 and m (denoted by boxes)

y_1 is the y coordinate of the first set of points.

The first coordinate pair is (9,7), so y_1  would be 7

y_1=7

Now, the slope (m).

It has formula

m=\frac{y_2-y_1}{x_2-x_1}

So, x_1 = 9

y_1 = 7

x_2 = 4

y_2 = -8

Substituting, we get the slope to be:

m=\frac{y_2-y_1}{x_2-x_1}\\m=\frac{-8-7}{4-9}\\m=\frac{-15}{-5}\\m=3

Hence, the equation of the line in point-slope is:

y-7=3(x-9)

5 0
2 years ago
a professional baseball game of lacrosse has 60 mintues of playing time.It is spit into 4 equal period of time.How many mintues
Anettt [7]
15 minutes in each period, b/c 60/4 = 15.
6 0
2 years ago
Read 2 more answers
The three vertices of a triangle drawn on a complex plane are represented by 0 + 0i, 4 + 0i, and 0+ 3i. The length of the hypote
EastWind [94]
The hypotenuse length is √(4*4 + 3*3) = 5 (not √7 I suppose)
The area is base*half height = 4*3/2 = 6.

In short, I don't think complex numbers really interfere here.

4 0
3 years ago
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