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MrMuchimi
3 years ago
13

PLEASE ANSWER ASAP! SUPAH IMPORTANT! MUST BE CORRECT! POINTS GIVEN!

Mathematics
2 answers:
Dafna11 [192]3 years ago
6 0

You said                                  -x + 8  >  6

Subtract 8 from each side:      -x        > -2

Add 'x' to each side:                 0        > -2 + x

Add  2  to each side:                      2  >  x

Now, test the choices:

     A).  Can 'x' be 4 ?
            No.  2  is not greater than  4 .

     B).  Can 'x' be  1 ?
           Yes.  2  is greater than  1 .

     C).  Can 'x' be  2 ?
            No.  2  is not greater than  2 .

     D).  Can 'x' be  15 ?
            No.  2  is not greater than  15 .
     
Dmitry_Shevchenko [17]3 years ago
5 0
-x+8>6, subtract 8 from both sides. -x>-2, divide both sides by -1. Your answer is x is greater than 2.
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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 <u>tested if the mean lifetime is not greater than 220,000 miles</u>, that is:

H_0: \mu \leq 220000

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

H_1: \mu > 220000.

We have the <u>standard deviation for the sample</u>, 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 <u>t = 2.69</u> and 23 - 1 = <u>22 df.</u>

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

8 0
2 years ago
When stating the null and alternative hypotheses, the hypotheses are: Select one: a. Always about the statistic only b. Always a
Nata [24]

Answer:

D. Always about the parameter only

Step-by-step explanation: A Null Hypothesis is a hypothesis used in statistics to show that there is no variation among the variables of interest. A Null Hypothesis also can be said to be giving a proposal that there is not significant difference between the observed data.

An alternative hypothesis is a hypothesis in statistics given contrary to the Null Hypothesis,a Null hypothesis can also be seen in statistics as stating that something is happening among the data.

3 0
3 years ago
In a triangle CMS angle C measure 63 degrees and angle M measures 47 degrees. wht is the measure of angle S?
muminat

Answer:

s=70

Step-by-step explanation:

all angles in a triangle add up to equal 180 degrees.

180-63-47=s

70=s

7 0
3 years ago
A number multiplied by 7 is less than 21. Which of the following expressions
Valentin [98]

(N instead of X for variable)

N x 7 < 21

5 0
3 years ago
Brainliest and 11 pts!
nirvana33 [79]
It is helpful to plot the points, then mentally test the answers for plausibility. Translation of E 1 unit to the right puts it at (2, 1), then rotation counterclockwise 90° about the origin puts it at (-1, 2), the location of E'.

The appropriate choice seems to be
  A translation 1 unit to the right followed by a 90-degree counterclockwise rotation about the origin


_____
Translation 1 unit right: (x, y) ⇒ (x+1, y)
Rotation 90° CCW: (x, y) ⇒ (-y, x)
Both transformations in that order: (x, y) ⇒ (-y, x+1)

4 0
3 years ago
Read 2 more answers
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