3 years ago

The phrase the difference between a number and four can be written as which variable expression

1 answer:

5 0

Try -×=4??? i just started to learn how to do variable expressions correctly bc i just transfered to an high accelerating school, but if I'm wrong w the answer im very sorry, as i am just now learning.

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Using traditional methods, it takes 8.1 hours to receive a basic flying license. A new license training method using Computer Ai

Karo-lina-s [1.5K]

Answer:

The value of the test statistic is 0.4.

Step-by-step explanation:

The value of the test statistic is given by:

Our test statistic is:

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is expected mean, $\sigma$ is the standard deviation and n is the size of the sample.

Using traditional methods, it takes 8.1 hours to receive a basic flying license.

This means that $\mu = 8.1$

A researcher used the technique with 23 students and observed that they had a mean of 8.2 hours with a standard deviation of 1.2.

This means that $n = 23, X = 8.2, \sigma = 1.2$

Find the value of the test statistic.

$t = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

$t = \frac{8.2 - 8.1}{\frac{1.2}{\sqrt{23}}}$

$t = 0.4$

The value of the test statistic is 0.4.

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A frame is 3 in wide and 9 in tall. if it is reduced to a height of 3 in, then how wide will it be?

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Help 5 minutes!!! I’m giving 50 points

tekilochka [14]

Answer:

5 - 3×1= -8

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^{3} + 3x

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^{3} means x cubed.

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