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1 year ago

1. when y=7 , what is the value of x? 2. what is the y-intercept of the graph?

Mathematics

1 answer:

Yakvenalex [24]1 year ago

7 0

1) Correct.

2) The y-intercept is when x=0, so it is (0,5).

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Answer:

Step-by-step explanation:

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2 years ago

Assume that a simple random sample has been selected from a normally distributed population. Find the test statistic t.

lawyer [7]

Using the t-distribution, it is found that the p-value of the test is 0.007.

At the null hypothesis, it is tested if the mean lifetime is not greater than 220,000 miles, that is:

$H_0: \mu \leq 220000$

At the alternative hypothesis, it is tested if the mean lifetime is greater than 220,000 miles, that is:

$H_1: \mu > 220000$ .

We have the standard deviation for the sample, thus, the t-distribution is used. The test statistic is given by:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

The parameters are:

$\overline{x}$ is the sample mean.
$\mu$ is the value tested at the null hypothesis.
s is the standard deviation of the sample.
n is the sample size.

For this problem:

$\overline{x} = 226450, \mu = 220000, s = 11500, n = 23$

Then, the value of the test statistic is:

$t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}$

$t = \frac{226450 - 220000}{\frac{11500}{\sqrt{23}}}$

$t = 2.69$

We have a right-tailed test(test if the mean is greater than a value), with t = 2.69 and 23 - 1 = 22 df.

Using a t-distribution calculator, the p-value of the test is of 0.007.

A similar problem is given at brainly.com/question/13873630

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2 years ago

What is the range of the averages in this class? histogram group of answer choices 65 points 80 points 30 points none of the abo

natulia [17]

The range of the averages in a class with a maximum point of 100 point and a minimum point of 20 point is 80 points

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

Range is the difference between the maximum value and minimum value of a data set. Hence:

Range = Maximum - Minimum

Let us assume that the maximum point is 100 point and the minimum point is 20 point, hence:

Range = 100 - 20 = 80 points

The range of the averages in a class with a maximum point of 100 point and a minimum point of 20 point is 80 points

Find out more on equation at: brainly.com/question/2972832

#SPJ1

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2 years ago

Please help a sister we are struggling!!!

disa [49]

Answer:

i just need the points

Step-by-step explanation:

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3 years ago

12 out of 142 people standing in line for tickets were going to see the movie in theater A. If there were a total of 1704 ticket

Naily [24]

I believe the answer is 144

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2 years ago

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