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3 years ago

Solution or not a solution and because

Mathematics

1 answer:

tamaranim1 [39]3 years ago

5 0

Step-by-step explanation:

X + Y = -3

X + 3x +5 = -3

X=-2

X+Y=-3

Y=-3+2

Y=-1

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A recent survey showed that in a sample of 100 elementary school teachers, 15 were single. In a sample of 180 high school teache

trapecia [35]

Answer:

By using hypothesis test at α = 0.01, we cannot conclude that the proportion of high school teachers who were single greater than the proportion of elementary teachers who were single

Step-by-step explanation:

let p1 be the proportion of elementary teachers who were single

let p2 be the proportion of high school teachers who were single

Then, the null and alternative hypotheses are:

$H_{0}$ : p2=p1

$H_{a}$ : p2>p1

We need to calculate the test statistic of the sample proportion for elementary teachers who were single.

It can be calculated as follows:

$\frac{p(s)-p}{\sqrt{\frac{p*(1-p)}{N} } }$ where

p(s) is the sample proportion of high school teachers who were single ( $\frac{36}{180} =0.2$ )
p is the proportion of elementary teachers who were single ( $\frac{15}{100} =0.15$ )

N is the sample size (180)

Using the numbers, we get

$\frac{0.2-0.15}{\sqrt{\frac{0.15*0.85}{180} } }$ ≈ 1.88

Using z-table, corresponding P-Value is ≈0.03

Since 0.03>0.01 we fail to reject the null hypothesis. (The result is not significant at α = 0.01)

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3 years ago

Determine the period

True [87]

To raise something upward with the force of a lever in order to remove, open, or look beneath it.

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2 years ago

Which steps will generate an expression equivalent to 17(x+5)? MARK BRAINLIEST

bezimeni [28]

Answer:

multiply 17x5=85,85+5=90 so aswer is 90

Step-by-step explanation:

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2 years ago

Read 2 more answers

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stiks02 [169]

Answer:

18

Step-by-step explanation:

replace a with -2

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3 years ago

A 26-kilometer section of a highway is designated as a scenic byway. New signs will be placed at the beginning and end of this s

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Answer:

$14$ new signs are needed.

Step-by-step explanation:

Given: A $26$ -kilometer section of a highway is designated as a scenic byway. New signs will be placed at the beginning and end of this section and at every $0.5$ Km in between.