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3 years ago

Mark his brainly nowwww

Mathematics

2 answers:

irakobra [83]3 years ago

7 0

Answer:

Mark who brainly when?

vivado [14]3 years ago

3 0

<3 id.k understand

´^`

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The amount of time the husband and the wife spend on house work is measured for 15 women and their 15 husbands. For the wives th

dolphi86 [110]

Answer:

The value of the test statistic is z = -0.877.

Step-by-step explanation:

Testing the difference in mean time spent on housework between husbands and wives.

At the null hypothesis, we test if there is no difference, that is, the subtraction of the means is 0:

$H_0: \mu_H - \mu_W = 0$

At the alternate hypothesis, we test if there is a difference, that is, the subtraction of the means is different from 0.

$H_1: \mu_H - \mu_W \neq 0$

The test statistic is:

$z = \frac{X - \mu}{s}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, and s is the standard error.

0 is tested at the null hypothesis:

This means that $\mu = 0$

For the wives the mean was 7 hours/week and for the husbands the mean was 4.5 hours/week. The standard deviation of the differences in time spent on house work was 2.85.

This means that $X = 4.5 - 7 = -2.5, s = 2.85$

What is the value of the test statistic for testing the difference in mean time spent on housework between husbands and wives?

$z = \frac{X - \mu}{s}$

$z = \frac{-2.5 - 0}{2.85}$

$z = -0.877$

The value of the test statistic is z = -0.877.

4 0

3 years ago

in the pattern is 80 the pattern follows the rule divide by 2 what are the next three numbers in the pattern

Sindrei [870]

80 divided by 2 is 40. 40 divided by 2 is 20. 20 divided by 2 is 10. This show the next three number is 40, 20, 10

5 0

4 years ago

Joel is fertilizing an irregularly shaped garden. the grid has squares with side lengths of 2 m. Estimate the area of the garden

Oksi-84 [34.3K]

Answer:

34.99

Step-by-step explanation:

4 0

3 years ago

What would '6 meters to 60 meters' be in a ratio

Anna007 [38]

Because you van turn 6 into 60 so they are in common. Hope that helps

3 0

4 years ago

Let the geometric sequence {an} be defined as follows: {12, 6, 3, 3 /2 , 3 /4 , 3/ 8 ,...} Find the sum of the entire sequence,

Korolek [52]

Answer:

A) 24

Step-by-step explanation:

The given geometric series is {12, 6, 3, 3 /2 , 3 /4 , 3/ 8 ,...}

Each term can be represented as a product of its previous term and \[\frac{1}{2}\]

The generic term of the series can be represented as the product of the first term 12 and \[\frac{1}{2}^{n-1}\] where n is the index of the term in the series.

The sum to infinity of such a series is given by the following formula:

\[\frac{term1}{1-ratio}\]

Substituting and calculating:

\[\frac{12}{1-\frac{1}{2}}\]

=\[\frac{12}{\frac{1}{2}}\]

=12*2 = 24

8 0

4 years ago