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Lyrx [107]
3 years ago
6

Plz help and explain.

Mathematics
1 answer:
Nikolay [14]3 years ago
6 0

Answer:

1.6E+12 = 1.6 x 10¹²  = 1,600,000,000,000  

Step-by-step explanation:

the calculator give the answer it did because the display Cara's calculator does not support all the numbers. Her calculator displays the number in scientific format.

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Ten engineering schools in the United States were surveyed. The sample contained 250 electrical engineers, 80 being women; 175 c
steposvetlana [31]

Answer:

There is a significant difference between the two proportions.

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for difference between population proportions is:

CI=(\hat p_{1}-\hat p_{2})\pm z_{\alpha/2}\times\sqrt{\frac{\hat p_{1}(1-\hat p_{1})}{n_{1}}+\frac{\hat p_{2}(1-\hat p_{2})}{n_{2}}}

Compute the sample proportions as follows:

\hat p_{1}=\frac{80}{250}=0.32\\\\\hat p_{2}=\frac{40}{175}=0.23

The critical value of <em>z</em> for 90% confidence interval is:

z_{0.10/2}=z_{0.05}=1.645

Compute a 90% confidence interval for the difference between the proportions of women in these two fields of engineering as follows:

CI=(\hat p_{1}-\hat p_{2})\pm z_{\alpha/2}\times\sqrt{\frac{\hat p_{1}(1-\hat p_{1})}{n_{1}}+\frac{\hat p_{2}(1-\hat p_{2})}{n_{2}}}

     =(0.32-0.23)\pm 1.645\times\sqrt{\frac{0.32(1-0.32)}{250}+\frac{0.23(1-0.23)}{175}}\\\\=0.09\pm 0.0714\\\\=(0.0186, 0.1614)\\\\\approx (0.02, 0.16)

There will be no difference between the two proportions if the 90% confidence interval consists of 0.

But the 90% confidence interval does not consists of 0.

Thus, there is a significant difference between the two proportions.

4 0
3 years ago
True or False: The relation
Andrews [41]

It would be false. :)                                                

3 0
3 years ago
Use the distributive property to remove the parentheses.
nlexa [21]

Answer:

Step-by-step 12c^{3} -40c^{8}explanation:

8 0
3 years ago
What is 21 divided by 50
Trava [24]

Answer:

o.42

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
What is the value of J
vladimir1956 [14]

Answer:

Step-by-step explanation:

Since all 3 of these angle come off a straight line, they all add up to equal 180. Thus,

2j + 32 + 6j - 2 + 30 = 180 and

8j + 60 = 180 and

8j = 120 so

j = 15

6 0
3 years ago
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