Ask question

Ask question

All categories

3 years ago

15

On our way to physical her parents Jennifer drives 265 miles in five hours what is her average rate of ace of speed in miles per

hour

1 answer:

OleMash [197]3 years ago

6 0

The answers is 53
Cause you gotta do 265 divided by 5

You might be interested in

Leah wrote 2 different fractions with the same denominator.Both fractions were less than 1.Can their sum equal 1?Can their sum b

andreev551 [17]

The answer is yes to both questions. Leah could write down 3/4 and 1/4 which would equal 1, but she could also write down 7/8 and 5/8 which is greater than 1.

7 0

3 years ago

Explain how to use 5×2/3 as a model?

algol [13]

Draw 5 boxes. split them into 3rds and color 2 thirds of yeach of them

6 0

3 years ago

In a large population, 82% of the households have cable tv. A simple random sample of 225 households is to be contacted and the

anzhelika [568]

Answer:

The mean of the sampling distribution of the sample proportions is 0.82 and the standard deviation is 0.0256.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

For proportions, the mean is $\mu = p$ and the standard deviation is $s = \sqrt{\frac{p(1-p)}{n}}$

In this problem, we have that:

$p = 0.82, n = 225$ .

So

$\mu = 0.82$

$s = \sqrt{\frac{p(1-p)}{n}} = \sqrt{\frac{0.82*0.18}{225}} = 0.0256$

The mean of the sampling distribution of the sample proportions is 0.82 and the standard deviation is 0.0256.

7 0

3 years ago

Read 2 more answers

Xelga [282]

It’s obvious. X Delmar practiced more

3 0

3 years ago

Read 2 more answers

It is known that 10% of the items produced by a certain machine end up having a flaw. If we select 7 items from the production l

denpristay [2]

Step-by-step explanation:

p = 0.1, q = 0.9, n = 7

a) Use complementary probability.

P(at least 1) = 1 − P(0)

P(at least 1) = 1 − (0.9)⁷

P(at least 1) = 0.522

b) Use binomial probability.

P = nCr pʳ qⁿ⁻ʳ

P(3) = ₇C₃ (0.1)³ (0.9)⁴

P(3) = 0.023

6 0

3 years ago