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victus00 [196]
3 years ago
11

Please help!!! no links or I will report!!! #6

Mathematics
1 answer:
Karolina [17]3 years ago
3 0

Answer:

(A) 33 1/3%

Step-by-step explanation:

it looks like there are 15 total people, and it's asking for the probability of a member <u>over</u> 40 being chosen.

Over means that 40 should be excluded

there are 5 people over 40 (43, 45, 50, 54, 58), which means the probability would be 5/15

5/15 = 1/3 ≈ 33 1/3%

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garik1379 [7]

Answer:

We can claim with 95% confidence that the proportion of executives that prefer trucks is between 19.2% and 32.8%.

Step-by-step explanation:

We have a sample of executives, of size n=160, and the proportion that prefer trucks is 26%.

We have to calculate a 95% confidence interval for the proportion.

The sample proportion is p=0.26.

 

The standard error of the proportion is:

\sigma_p=\sqrt{\dfrac{p(1-p)}{n}}=\sqrt{\dfrac{0.26*0.74}{160}}\\\\\\ \sigma_p=\sqrt{0.0012}=0.0347

The critical z-value for a 95% confidence interval is z=1.96.

The margin of error (MOE) can be calculated as:

MOE=z\cdot \sigma_p=1.96 \cdot 0.0347=0.068

Then, the lower and upper bounds of the confidence interval are:

LL=p-z \cdot \sigma_p = 0.26-0.068=0.192\\\\UL=p+z \cdot \sigma_p = 0.26+0.068=0.328

The 95% confidence interval for the population proportion is (0.192, 0.328).

We can claim with 95% confidence that the proportion of executives that prefer trucks is between 19.2% and 32.8%.

3 0
3 years ago
Helppppppp please, all math lovers I'm calling for you​
Katen [24]

Answer:

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Step-by-step explanation:

The first step to any algebra equation is to isolate the variable and you do that by divide square root 2 since it cancels out on the left side and now n is alone.

Hoped that helped :)

8 0
2 years ago
Kendall scored 3 times as many points as Abdul scored in a basketball game. Otis scored 5 more points than Abdul
Readme [11.4K]
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Answer:

-4

Step-by-step explanation:

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