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3 years ago

8

a police officer records the speeds of vehicles on a road.what percent of the vehicles were traveling between 51-55 miles per ho

ur?show work

1 answer:

Marrrta [24]3 years ago

4 0

Answer:

24%

Step-by-step explanation:

50 is the 100%

so

12/50= 24%

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The fraction 2/5 is equivalent to 0.4 and 2 40%. Write 0.4 and 40% as unreduced fractions.

Bezzdna [24]

0.4 = 4/10
40% = 40/100

5 0

3 years ago

A company receives shipments of a component used in the manufacture of a component for a high-end acoustic speaker system. When

Tanya [424]

Answer:

$ME= 2.33*\sqrt{\frac{0.096*(1-0.096)}{250}}= 0.0434$

Step-by-step explanation:

For this case we have a sample size of n = 250 units and in this sample they found that 24 units failed one or more of the tests.

We are interested in the proportion of units that fail to meet the company's specifications, and we can estimate this with:

$\hat p = \frac{24}{250}= 0.096$

The margin of error is the range of values below and above the sample statistic in a confidence interval.

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 confidence interval for a proportion is given by this formula

$\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}$

For the 98% confidence interval the value of $\alpha=1-0.98=0.02$ and $\alpha/2=0.01$ , with that value we can find the quantile required for the interval in the normal standard distribution.

$z_{\alpha/2}=2.33$

And the margin of error would be:

$ME= 2.33*\sqrt{\frac{0.096*(1-0.096)}{250}}= 0.0434$

4 0

3 years ago

Mckenzie works for a catering company. She is making tea for an upcoming event. For each container of tea, she uses 16 tea bags,

andrezito [222]

12 if you times 16 by four do the same to 3. Hope this helps

3 0

3 years ago

Which of the following numbers can be expressed as a decimal that terminates? 3/2,2/3,3/4,5/7

wel

Answer:

Step-by-step explanation:

An example of one fraction that does NOT terminate is 2/3.

2/3 = 0.666666666666666 .... That's the easy way to tackle the problem. Pick out the ones that don't terminate.

5/7 is the other one. It does not terminate either. It has 6 digits in a block that keeps on repeating itself forever.

5/7 = .571428 571428 which goes on forever.

So the two that do terminate are

3/2 which = 1.5

3/4 which = 0.75

6 0

2 years ago

7+4=11 what other addition fact does he know that shows the same addenda? Write the new fact.

ikadub [295]

11+0=11
10+1=11
9+2=11
8+3=11
6+5=11
5+6=11
4+7=11

4 0

3 years ago