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3 years ago

Can someone please help me with this and show work as well?? thank you so much!

Mathematics

1 answer:

Schach [20]3 years ago

8 0

Use a compass to make a circle around both lasers at the same degree and they should over lap. where they over lap use your straight edge to make a direct line from the point where your at through where they cross. that will be your answer, hope i helped.

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The sunshine Club collected 524 cans for a canned food drive. the cans were then split up equally into 8 boxes.

Shkiper50 [21]

524/8=65.5

There were 65 cans in each box.

65•8= 520
524-520=4
There were 4 cans left over

6 0

3 years ago

Psychology students at Wittenberg University completed the Dental Anxiety Scale questionnaire (Psychological Reports, August 199

fredd [130]

Answer:

a) $Z = 1.43$

b) There is a 48.696% probability that someone scores between a 10 and a 15 on the Dental Anxiety Scale is

Step-by-step explanation:

Normal model problems can be solved by the zscore formula.

On a normaly distributed set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a value X is given by:

$Z = \frac{X - \mu}{\sigma}$

Each z-score value has an equivalent p-value, that represents the percentile that the value X is.

In our problem, the mean score was 11 and the standard deviation was 3.5.

So, $\mu = 11$ , $\sigma = 3.5$ .

(a) Suppose you score a 16 on the Dental Anxiety Scale. Find the z-value for this score.

What is the value of Z when $X = 16$ ?

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{16 - 11}{3.5} = 1.43$

(b) Find the probability that someone scores between a 10 and a 15 on the Dental Anxiety Scale.

We have to find the percentiles of both of these scores. This means that we have to find Z when $X = 10$ and $X = 15$ . The probability that someone scores between a 10 and a 15 is the difference between the pvalues of the z-value of X = 10 and X = 15.

When $X = 10$

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{10 - 11}{3.5} = -0.29$

Looking at the z score table, we find that the pvlaue of $Z = -0.29$ is 0.3859.

When $X = 15$

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{15 - 11}{3.5} = 1.14$

Looking at the z score table, we find that the pvlaue of $Z = 1.14$ is 0.87286.

So, the probability that someone scores between a 10 and a 15 on the Dental Anxiety Scale is

0.87286 - 0.3859 = 0.48696 = 48.696%

(c) Find the probability that someone scores above a 17 on the Dental Anxiety Scale

This probability is 100% minus the pvalue of the zvalue when $X = 17$

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{17 - 11}{3.5} = 1.71$

When $Z = 1.71$ , the pvalue is 0.95637. This means that there is a 95.637% probability that someone scores BELOW 17 on the dental anxiente scale.

100 - 95.637 = 4.363%

There is 4.363% probability that someone scores above a 17 on the Dental Anxiety Scale

4 0

3 years ago

Which of these mappings is a function?

strojnjashka [21]

Answer:

Step-by-step explanation:

My power of guesssing :)

6 0

3 years ago

Help me ASAP for this question

steposvetlana [31]

Answer:

It would be the first graph, because if you look at the points on your graph the first one is (0,1), the the next one is (5,2), and so on so forth, that makes your answer the first graph, because that table is showing you the points that are marked

Step-by-step explanation:

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3 years ago

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Which of the following is something that will not affect your homeowners insurance premium? a. the distance of the home from a s

RideAnS [48]

The correct answer for this question above homeowners insurance premium would be option A. The one that is something that will not affect your homeowners insurance premium would be the distance of the home from school. In addition, the color of the home won't affect it as well. Hope this answer helps.

6 0

3 years ago

Read 2 more answers