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lesya [120]
2 years ago
9

2. (01.01 LC)

Mathematics
1 answer:
tino4ka555 [31]2 years ago
7 0

Answer:

is there a picture I can look at?

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For an intramural sports program at a particular college, the time to run one mile is recorded for 200 male students in the prog
jeka57 [31]

Answer:

Devon has the lower z-score, so he was faster relative to his gender.

Step-by-step explanation:

Z - score

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Who ran the mile faster relative to their gender?

Who runs in less time the mile is faster, so whoever has the lower z-score is faster relative to their gender.

Devon participates in the intramural program for men. His best time to run the mile is 6.6 minutes.

For men, these times are approximately normal with mean 8 minutes and standard deviation 1 minute.

So we have to find Z when X = 6.6, \mu = 8, \sigma = 1

Z = \frac{X - \mu}{\sigma}

Z = \frac{6.6 - 8}{1}

Z = -1.4

Kendall participates in the intramural program for women. Her best time to run the mile is 5.7 minutes.

For women, these times are approximately normal with mean 7.5 minutes and standard deviation 2 minutes.

So we have to find Z when X = 5.7, \mu = 7.5, \sigma = 2

Z = \frac{X - \mu}{\sigma}

Z = \frac{5.7 - 7.5}{2}

Z = -0.9

Devon has the lower z-score, so he was faster relative to his gender.

5 0
3 years ago
the parking space outside sky towers measures 2x-1 meters x+2 meters . what is rhe cost of cleaning the parking area if the clea
antiseptic1488 [7]

Answer:

Rs 100x² + 150x - 100

Step-by-step explanation:

Area of the parking space = Length * Width

Area of the space = (2x-1)(x+2)

Expand

Area of the space = 2x² + 4x - x - 2

Area of the space = (2x²+3x - 2) sq. m

Since 1sq.m = Rs 50'

(2x²+3x - 2) sq. m= z

z = 50 (2x²+3x - 2)

z = 100x² + 150x - 100

hence the cost of the parking spsce is Rs.100x² + 150x - 100

4 0
2 years ago
What is the length of BD?
madreJ [45]

Answer:

thank you for letting me have the points!

Step-by-step explanation:

6 0
3 years ago
Are 4(5+x) and (5+4)+x equal
SSSSS [86.1K]

Answer:

No, they are not equal

Step-by-step explanation:

If x = 1

4(5+x) = 4(5+1) = 4 x 6 = 24

(5+4) + x  = 9 +1 = 10

24\neq10

3 0
2 years ago
A walking path across a park is represented by the equation y = -4x+10. A
ad-work [718]

first invert fraction of the slope from 4/1 to 1/4 and switch sign. then figure out the y-intercept

the algebraic approach would work like this:

-4x + 10 = 1/4x + b

plug in what you got, here: the intersection information

-4*(4) + 10 = 1/4*(4) + b

-16 + 10 = 1 + b

-6 = 1 + b

-7 = b

3 0
3 years ago
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