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4 years ago

A grading machine can grade 96 multiple

Mathematics

1 answer:

weqwewe [10]4 years ago

8 0

Answer:

6.25 minutes or 375 seconds

Step-by-step explanation:

We can solve the following problem through the Proportion method.

Here,

we may take the time taken by the machine as x

$96 : 2 : : 300 : x\\96x= 2 *300\\96x=600\\x=600/96\\x=6.25\ minutes$

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Assume that adults were randomly selected for a poll. They were asked if they "favor or oppose using federal tax dollars to fund

ser-zykov [4K]

Testing the hypothesis, it is found that since the p-value of the test is 0.0042 < 0.01, it can be concluded that the proportion of subjects who respond in favor is different of 0.5.

At the null hypothesis, it is tested if the proportion is of 0.5, that is:

$H_0: p = 0.5$

At the alternative hypothesis, it is tested if the proportion is different of 0.5, that is:

$H_1: p \neq 0.5$

The test statistic is given by:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1 - p)}{n}}}$

In which:

$\overline{p}$ is the sample proportion.
p is the value tested at the null hypothesis.
n is the sample size.

In this problem, the parameters are given by:

$p = 0.5, n = 483 + 398 = 881, \overline{p} = \frac{483}{881} = 0.5482$

The value of the test statistic is:

$z = \frac{\overline{p} - p}{\sqrt{\frac{p(1 - p)}{n}}}$

$z = \frac{0.5482 - 0.5}{\sqrt{\frac{0.5(0.5)}{881}}}$

$z = 2.86$

Since we have a two-tailed test(test if the proportion is different of a value), the p-value of the test is P(|z| > 2.86), which is 2 multiplied by the p-value of z = -2.86.

Looking at the z-table, z = -2.86 has a p-value of 0.0021.

2(0.0021) = 0.0042

Since the p-value of the test is 0.0042 < 0.01, it can be concluded that the proportion of subjects who respond in favor is different of 0.5.

A similar problem is given at brainly.com/question/24330815

3 0

3 years ago

To make the perfect orange color hector mixes 2/3 quarts of red paint with 1 4th Court of yellow paint. How much red paint is us

jonny [76]

6/12 or the same thing but reduced 1/2

WELCOME!

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3 years ago

Read 2 more answers

What’s 2x2x2x2x2xx2x2x2 Just trying to be nice and give someone brainlest

Ratling [72]

Answer:

256

Step-by-step explanation:

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3 years ago

X^3 ÷ x^5 a)x^8 b)x^2 c)x^-8 d)x^-2

tatiyna

Answer:

D....................

Step-by-step explanation:

7 0

3 years ago

A theater has 33 seats in the first row, 37 seats in the second row. 41 seats in the third row, and so on. How many seats are th

Jlenok [28]

Answer:

90 seats are in row 19

Step-by-step explanation:

The pattern is adding 4 seats so 3 x 19 is 57 so 33 + 57 is 90 seats

Hope this helps

5 0

2 years ago