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Allushta [10]
1 year ago
12

In a random sample of 62 professional actors, it was found that 40 were extroverts. Please find the point estimate, 95% confiden

ce interval for p, and provide a brief explanation of your answers.
Mathematics
1 answer:
den301095 [7]1 year ago
3 0

The point Estimate is 0.645 , the confidence interval is (0.525 ,0.764).

<h3>What is Point Estimate ?</h3>

The point estimate is the proportion of success in the sample.

From the data given

p = 40/62

p = 0.645

The point Estimate is 0.645

(b) Confidence interval for true proportion is

\rm {p -Z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}  , p +Z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}

For 95 % Z = 1.96

p =0.645

1-p = 0.355

putting the values

\rm {0.645 -1.96 \sqrt{\dfrac{0.645\times0.355}{62}}  , {0.645 +1.96 \sqrt{\dfrac{0.645\times0.355}{62}} \\

(0.525 , 0.764)

Lower Limit = 0.525

Upper Limit = 0.764

To know more about Point Estimate

brainly.com/question/17514579

#SPJ1

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Janet can plant nine feet of carrots in 15 minutes while her daughter Amy can plant 17 feet of carrots in half an hour.
Lena [83]

Answer:

Step-by-step explanation:

In order to find who is more efficient at planting carrots, we want to put both ratios in terms of the same amount of time.

For simplicity, lets see how many carrots each can make in 1 hour.

Janet:\\9ft \: in \: 15 \:minutes

\frac{9ft}{15min} = \frac{xft}{60min}\\x = \frac{60*9}{15} = 36

Janet can plant 36 feet of carrots in one hour

Amy:\\\frac{17ft}{30min} = \frac{xft}{60min}\\x = \frac{17*60}{30} = 34

Amy can plant 34 feet of carrots in one hour

So, Janet can plant carrots more quickly

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2 years ago
If 20 out of 25 students in a P.E. class are boys, what percent of the class is made up of boys?
Ivanshal [37]
80% !
hope this helps
4 0
3 years ago
Which expressions are equivalent to the expression 7(5 + m) – 8? Check all that apply.
IRINA_888 [86]

Answer:

there are no expressions in the question, so I can't help you. Can you post the expressions?

5 0
3 years ago
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The image of parallelogram PQRS after a reflection across Line W Y is parallelogram P'Q'R'S'.
Luden [163]

Answer:

the answer is 6

Step-by-step explanation:

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A company tests the life of its rechargeable batteries over six months of use. They test how long a battery will last after a fu
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Answer:

18.6 months

Step-by-step explanation:

Given that :

Best fit line from scatterplot :

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x = Number of month

y = charge on battery

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When battery is dead completely ; charge =0, y = 0

y = -12.05x + 224.26

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