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inna [77]
3 years ago
13

Boys to girl 11;9 there are 124 more boys what is the total number of students

Mathematics
1 answer:
Deffense [45]3 years ago
7 0

(124 \div 2) \times (11 + 9) = 1240
total number of students : 1240
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Obtuse angles are more than 90° and less than 180°
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For which data set is a linear regression most reasonable?
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The correct option is;

A. A set of nine data pairs with a correlation coefficient r = -0.4

Step-by-step explanation:

In statistical analysis, it is important to make use of an adequate sample size in order to arrive at a valid result. An analysis with a very small sample size can provide misleading results

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Therefore, the data set having nine data pairs with a negative correlation of -0.4 will provide the most valid result that can then be used for generalization about the larger statistical population.

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There is enough evidence to support the claim that the batteries power the laptops for significantly less than 4 hours. (P-value = 0).

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H_0: \mu=4\\\\H_a:\mu< 4

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<em>The question is incomplete: To test this claim a sample or population standard deviation is needed.</em>

<em>We will estimate that the sample standard deviation is 2 hours, and use a t-test to test that claim.</em>

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P-value=P(t

As the P-value (0) is smaller than the significance level (0.05), the effect is  significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that the batteries power the laptops for significantly less than 4 hours.

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