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pychu [463]
3 years ago
5

Plz helppppppp me qwq

Mathematics
1 answer:
ruslelena [56]3 years ago
6 0

Answer: For the first part

1250 = 150

1525 = 183

1850 = 222

2200 = 264

Step-by-step explanation:

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Twenty-five randomly selected students were asked the number of movies they watched the previous week. The results are as follow
guajiro [1.7K]

Answer:

a) x = 1.52

b) s = 1.16

Step-by-step explanation:

We have that:

5 students watched 0 movies.

9 students watched 1 movie.

5 students watched 2 movies.

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1 student watched 4 movies.

(a) Find the sample mean x.

Sum divided by the number of students. So

x = \frac{5*0 + 9*1 + 5*2 + 5*3 + 1*4}{5 + 9 + 5 + 5 + 1} = \frac{38}{25} = 1.52

(b) Find the approximate sample standard deviation, s.

Standard deviation of the sample.

Square root of the sum of the squares of the values subtracted from the mean, divided by the sample size subtracted by 1. So

s = \sqrt{\frac{5*(0-1.52)^2 + 9*(1-1.52)^2 + 5*(2-1.52)^2 + 5*(3-1.52)^2 + 1*(4-1.52)^2}{24}} = \sqrt{\frac{32.24}{24}} = 1.16

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3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
Round each number to the nearest ten 24. 311. 107
astraxan [27]

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Graph the line perpendicular to x = -2 that passes through ( -3, 7)
erma4kov [3.2K]

Answer:

The parallel line would be y = 7

Step-by-step explanation:

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330% of what number is 92.4?
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92.4/3.3 = 28

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Step-by-step explanation:

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