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My name is Ann [436]
4 years ago
12

a random sample of size 200 is drawn from a large population. The population standard deviation is 1.2. The sample mean is 15.8.

Estimate the size of the population mean including margin of error.

Mathematics
1 answer:
Marrrta [24]4 years ago
3 0

Step-by-step Answer:

N=sample size = 200

sigma = population standard deviation = 1.2

s=Sample mean = 15.8


Best estimate of population mean = 15.8

standard error = sigma / sqrt(N)

= 1.2/sqrt(200)

= 0.08485

Therefore

estimate of population mean = 15.8 +/- 0.0848


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Answer:

C. The likelihood of having brown eyes is 35%

Step-by-step explanation:

Add the total number of people, which gives you 50.

To find the percent of brown-eyed people out of 50, divide 35 by 50, then multiply the result (0.7) by 100 to get 70%.

70% of people are brown-eyed, thus, C is a false statement.

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An ice skater skates completely around the two circles shown in the diagram. Each circle has a diameter of 20 meters. What is th
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3 years ago
The coordinates of the vertices of ΔMDT are M (4, −3),D (−6, −1), and T (7, −8). Identify the perimeter of ΔMDT. Round each side
Ganezh [65]
M=(4,-3)\qquad D=(-6,-1)\qquad T=(7,-8)\\\\\\
|MD|=\sqrt{\big(-6-4\big)^2+\big(-1-(-3)\big)^2}=\sqrt{\big(-10\big)^2+\big(-1+3\big)^2}=\\\\=\sqrt{100+2^2}=\sqrt{104}\approx\boxed{10.2}\\\\\\\\
|DT|=\sqrt{\big(7-(-6)\big)^2+\big(-8-(-1)\big)^2}=\sqrt{\big(7+6\big)^2+\big(-8+1\big)^2}=\\\\=\sqrt{13^2+(-7)^2}=\sqrt{169+49}=\sqrt{218}\approx\boxed{14.8}\\\\


|TM|=\sqrt{\big(4-7\big)^2+\big(-3-(-8)\big)^2}=\sqrt{\big(-3\big)^2+\big(-3+8\big)^2}=\\\\=\sqrt{9+5^2}=\sqrt{9+25}=\sqrt{34}\approx\boxed{5.8}

So the perimeter:

P_{\Delta MDT}=|MD|+|DT|+|TM|\approx10.2+14.8+5.8=\boxed{30.8}

Answer C.
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4 years ago
A random sample of 300 balls hit into play in college baseball games is taken. For each ball hit into play, it is recorded wheth
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Answer:

(D) H_0H0​: The direction of the ball and whether it results in a hit or an out are independent.

Step-by-step explanation:

Given that

There is 300 balls random sample is taken

We need to find out the appropriate null hypothesis that lies between the ball direction and lead to a hit or an out

So

Based on the given options, the option d is correct as the ball direction and its results either be hit or on out would represent that they are independent

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3 years ago
PLEASE HELP!!!! Identify the mistake and use the correct answer to the problem!!!
Tems11 [23]

Answer:

1 \frac{3}{8}

Step-by-step explanation:

the denominators must be the same so, since 4 goes evenly into 24 we can create an equivalent fraction from 3/4 to 18/24 (multiply numerator and denominator by 6)

now you can add:

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since the numerator is larger than the denominator this is called an improper fraction and can be changed into a mixed number by dividing 24 into 33

24 goes into 33 one time with a remainder of 9

so 33/24 = 1 \frac{9}{24} wherein 9 and 24 can each have a 3 factored out to make it fully simplified

9÷3 = 3

24÷3 = 8

final answer is 1 \frac{3}{8}

6 0
2 years ago
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