All categories

4 years ago

What's P(A and B) mean

1 answer:

6 0

Answer: It expresses that the probability of those two independent events, is the product of the two individual probabilities.

You might be interested in

Which of the following is an even function?

gregori [183]

Answer:

f(x) = |x| that's the answer

8 0

3 years ago

Read 2 more answers

There *must* be an easier way of simplifying this expression. What could I have done differently?

LiRa [457]

You can add the exponents of x^3*x^4 instead of writing it all out. Do you would just have to add 3+4 since the variable (x) is the same. And you would get x^7

8 0

4 years ago

HURRY PLSS

RUDIKE [14]

Step-by-step explanation:

-8 < 3x + 7 <= 10

-15 < 3x <= 3 (subtract 7)

-5 < x <= 1 (divide by 3)

Hence the correct options are -3, 0 and 1.

3 0

3 years ago

The mean height of women in a country (ages 20minus29) is 64.2 inches. A random sample of 75 women in this age group is select

padilas [110]

Answer:

$z=\frac{65-64.2}{\frac{2.84}{\sqrt{75}}} = 2.440$

And we can find the probability using the complement rule and with the normal standard table like this:

$P(Z>2.440) =1-P(Z$

The probability that the mean height for the sample is greater than 65 inches is 0.007

Step-by-step explanation:

Let X the random variable that represent the women heights of a population, and we know the following parameters

$\mu=64.2$ and $\sigma=2.84$

We are interested on this probability

$P(X>65)$

Since the sample size selected is 75>30 we can use the centrel limit theorem and the appropiate formula to use would be the z score given by:

$z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

If we find the z score for 65 inches we got:

$z=\frac{65-64.2}{\frac{2.84}{\sqrt{75}}} = 2.440$

And we can find the probability using the complement rule and with the normal standard table like this:

$P(Z>2.440) =1-P(Z$

The probability that the mean height for the sample is greater than 65 inches is 0.007

7 0

3 years ago

I am having trouble with the Inductive Step of the theorem below...

77julia77 [94]

Answer:

I NEED HELP WITH THIS TOO ITS SUPER HARD

Step-by-step explanation:

5 0

3 years ago