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mixas84 [53]
3 years ago
12

Can someone please explain what I did wrong here? Thank you!

Mathematics
1 answer:
WARRIOR [948]3 years ago
4 0

Answer:

P(Tamika)=\frac{1}{3} \times\frac{1}{3} =\frac{1}{9} \\P(Jayden)=\frac{1}{3} ;\\P=P(Tamika)\timesP(Jayden)=\frac{1}{9}\times\frac{1}{3}=\frac{1}{27}

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Three of these expressions give the distance between points A and B on the number line. Which expression does NOT?
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In a survey of 600 students in a school. 150 student were found to be taking tea and 225 taking coffee, 100 were taking both tea
EastWind [94]

Answer:

125

Step-by-step explanation:

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Sally spelled 2 words incorrectly out of 20 spelling words on the test. What percent grade did Sally get on the test?
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Answer:

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Step-by-step explanation:

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2 years ago
Suppose the mean height for adult males in the U.S. is about 70 inches and the standard deviation is about 3 inches. Assume men’
nlexa [21]

Question options :

a. They should be between 64 and 76 inches tall.

b. They should be close to the height that is 95% of the mean. That is, 66.5 inches, plus or minus 2 standard deviations.

c. They should be at or below the 95th percentile, which is 74.92 inches.

d. None of the above.

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Step-by-step explanation:

Given the following :

Assume men's height follow a normal curve ; and :

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According to the empirical rule ;

Assuming a normal distribution with x being random variables ;

About 68% of x-values lie between -1 to 1 standard deviation of the mean. With about 95% of the x values lying between - 2 and +2 standard deviation of mean. With 99.7% falling between - 3 to 3 standard deviations from the mean.

Using the empirical rule :

95% will fall between + or - 2 standard deviation of the mean.

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Upper limit = 2(3) = 6

(-6+mean) and (+6+ mean)

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64 and 76

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3 years ago
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