HELP!!! MARKING BRAINLIEST

Mathematics

2 answers:

Ilya [14]2 years ago

4 0

Answer:

Not trying to take points but it is too blurry I can’t see it

Step-by-step explanation:

ella [17]2 years ago

3 0

First, for 3^4, you multiply the number 3 by itself 4 times, so that would be 81. now, let’s figure out what 8 x 7 is. 8 x 7 is 56. now, subtract 56 from 81. your answer is 25! hope this helped!

You might be interested in

A sample of size 6 will be drawn from a normal population with mean 61 and standard deviation 14. Use the TI-84 Plus calculator.

AVprozaik [17]

Answer:

$X \sim N(61,14)$

Where $\mu=61$ and $\sigma=14$

Since the distribution for X is normal then the distribution for the sample mean is also normal and given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

$\mu_{\bar X} = 61$

$\sigma_{\bar X}= \frac{14}{\sqrt{6}}= 5.715$

So then is appropiate use the normal distribution to find the probabilities for $\bar X$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean". The letter $\phi(b)$ is used to denote the cumulative area for a b quantile on the normal standard distribution, or in other words: $\phi(b)=P(z$