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kirill115 [55]
2 years ago
11

Pllssss helllppppp award 20 points

Mathematics
2 answers:
madreJ [45]2 years ago
6 0

Answer:11

Step-by-step explanation:

Alexeev081 [22]2 years ago
3 0
The answer is 5 if I’m not mistaken
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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
Greeley [361]

Answer:

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

Step-by-step explanation:

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?

The lower the percentile of time ran, the faster. So whoever has the lower z-score ran the mile faster.

Devon

His best time to run the mile is 6.6 minutes.

These times are approximately normal with mean 8 minutes and standard deviation 1 minute.

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

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

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

Z = -1.4

Kendall

Her best time to run the mile is 5.7 minutes.

These times are approximately normal with mean 7.5 minutes and standard deviation 2 minutes.

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

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

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

Z = -0.9

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

3 0
3 years ago
Solye for x.<br> 8(x + 1) - 3[X + 4) = 7(2 - x)
kramer

Answer:

3/2

Step-by-step explanation:

distribute 8,-3,7

4 0
3 years ago
there are 82 people in a survey who like vanilla ice cream. if 2 out of every 5 people surveyed like vanilla ice cream, how many
Anton [14]
82 / (2/5) = 82*5/2 = 205 people

7 0
3 years ago
Can you guys help me?
fiasKO [112]
16.
1/2= 0.5 and it takes 16 months to get to 8 inches.
0.5x16=8
8 0
3 years ago
Read 2 more answers
The sum of all but one interior angle of a heptagon is 776°. The final angle must have a measure of
shutvik [7]
A heptagon has 7 sides.

Sum of all interior angles = (7 - 2) x 180 = 900°

900 - 776 = 124°

Answer: The final angle must be 124°
5 0
3 years ago
Read 2 more answers
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