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Burka [1]
3 years ago
10

Anyone one know the answer?

Mathematics
2 answers:
dalvyx [7]3 years ago
4 0
Whaaaaaaaaaaaaaaaaaaaa
antiseptic1488 [7]3 years ago
3 0
Hmmmmm I see that’s a good question
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I need lil help on theses kidda confuse on the key word are apologized
Nina [5.8K]
Put this in the history section not math
3 0
4 years ago
Find measure of side AB round to nearest tenth
vova2212 [387]
Use:

|AB|^2=|AC|^2+|BC|^2-2|AC||BC|\cos(m\angle ACB)

We have:

|AC|=13;\ |BC|=29;\ m\angle ACB=41^o

\cos41^o\approx0.7547

substitute:

|AB|^2=13^2+29^6-2\cdot13\cdot29\cdot0.7547\\\\|AB|^2=440.9562\\\\|AB|\approx21
8 0
3 years ago
Ten years ago 53% of American families owned stocks or stock funds. Sample data collected by the Investment Company Institute in
stiks02 [169]

Answer:

a) The null and alternative hypothesis are:

H_0: \pi=0.53\\\\H_a:\pi

b) If 300 families were sampled, for a significance level of 5%, there is enough evidence to support the claim that a smaller proportion of American families own stocks or stock funds this year than 10 years ago (P-value = 0.001).

 

Step-by-step explanation:

The claim that we want to have evidence to support is that a smaller proportion of American families own stocks or stock funds this year than 10 years ago.

The hypothesis for this test should state:

- For the null hypothesis, that the population proportion is not significantly different from 53%.

H_0:\pi=0.53

- For the alternative hypothesis, that the population proportion is significantly less than 53%.

H_a: \pi

If 300 families are sampled, we can perform a hypothesis test for a proportion.

The claim is that a smaller proportion of American families own stocks or stock funds this year than 10 years ago.

Then, the null and alternative hypothesis are:

H_0: \pi=0.53\\\\H_a:\pi

The significance level is 0.05.

The sample has a size n=300.

The sample proportion is p=0.44.

The standard error of the proportion is:

\sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt{\dfrac{0.53*0.47}{300}}\\\\\\ \sigma_p=\sqrt{0.00083}=0.029

Then, we can calculate the z-statistic as:

z=\dfrac{p-\pi+0.5/n}{\sigma_p}=\dfrac{0.44-0.53+0.5/300}{0.029}=\dfrac{-0.088}{0.029}=-3.065

This test is a left-tailed test, so the P-value for this test is calculated as:

\text{P-value}=P(z

As the P-value (0.001) is smaller than the significance level (0.05), the effect is  significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that a smaller proportion of American families own stocks or stock funds this year than 10 years ago.

3 0
3 years ago
Can anyone help I’ll give you brainliest
inn [45]

Answer:

$3580.50

Annual occurs once a year


8 0
3 years ago
Read 2 more answers
3. Roger runs 8 miles per hour. He ran for h
kumpel [21]

Answer:

8<em>h</em>

Step-by-step explanation:

8 miles per hour

<em>h</em> hours

plug in <em>h </em>for how many hours

8 divided by 6 is 1.3

1.3 hours to run 6 miles

8 0
3 years ago
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