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seropon [69]
3 years ago
8

In Lexie's art bag there are 11 green colored pencils, 7 blue colored pencils, and 3 red colored pencils. What is the ration of

the green colored pencils to the blue colored pencils?
Mathematics
1 answer:
melamori03 [73]3 years ago
7 0

Answer: 11:7

Step-by-step explanation:

Number of green colored pencils=11

Number of blue colored pencils= 7

Number of red colored pencils= 3

Total number of colored pencils= 11+7+3= 21

Ratio of green colored pencils to blue colored pencils= 11:7

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A national study report indicated that​ 20.9% of Americans were identified as having medical bill financial issues. What if a ne
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Answer:

The​ p-value for this​ test is 0.22065.

Step-by-step explanation:

We are given that a national study report indicated that​ 20.9% of Americans were identified as having medical bill financial issues.

A news organization randomly sampled 400 Americans from 10 cities and found that 90 reported having such difficulty.

<u><em>Let p = proportion of Americans who were identified as having medical bill financial issues in 10 cities.</em></u>

SO, Null Hypothesis, H_0 : p \leq 20.9%   {means that % of Americans who were identified as having medical bill financial issues in these 10 cities is less than or equal to 20.9%}

Alternate Hypothesis, H_A : p > 20.9%   {means that % of Americans who were identified as having medical bill financial issues in these 10 cities is more than 20.9% and is more severe}

The test statistics that will be used here is <u>One-sample z proportion</u> <u>statistics</u>;

                                  T.S.  = \frac{\hat p-p}{{\sqrt{\frac{\hat p(1-\hat p)}{n} } } } }  ~ N(0,1)

where, \hat p = sample proportion of 400 Americans from 10 cities who were found having such difficulty =  \frac{90}{400} = 0.225 or 22.5%

            n = sample of Americans = 400

So, <u><em>test statistics</em></u>  =  \frac{0.225-0.209}{{\sqrt{\frac{0.225(1-0.225)}{400} } } } }

                               =  0.77

<u></u>

<u>Now, P-value of the test statistics is given by the following formula;</u>

         P-value = P(Z > 0.77) = 1 - P(Z \leq 0.77)

                                            = 1 - 0.77935 = 0.22065

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3 years ago
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