I think that the correct answer would be C. I know that it couldn't be A because not everyone in 2nd period got 100% and the average students got below 95%. B no because they do not have the same median. D, I do not think so at all. So I would go with C I think it is relatively the best answer!!

Hope that helps!1

4 0

3 years ago

Suppose that the speed at which cars go on the freeway is normally distributed with mean 65 mph and

castortr0y [4]

Answer:

B) the probability that is traveling more than 63 mph is 0.6293 (or 62.93%)

Step-by-step explanation:

Given:

Normally Distributed
Mean (μ) = 65 mph
Standard Deviation (σ) = 6 miles per hour

Finding the Probability:

If one car is randomly chosen, we want the probability that is traveling more than 63 mph is,

P(X > 63)

To find the value of z,

z = x - μ / σ

z is the standard score
x is the observed value
μ is the mean of the sample
σ is the standard deviation of the sample

z = 63 - 65 / 6

z = -2 / 6

z = -1 / 3 which is approximately -0.33

Using Z table (attached below):

z = -0.33

to find this on the table

on the vertical side under z go to -0.3
on the horizontal next to z, go to .03

The area under the curve is 0.3707

P(z > 63) = 1 - P(z < 63)

= 1 - 0.3707

= 0.6293

Hence the probability that is traveling more than 63 mph is 0.6293

Learn more Probability from a similar example: brainly.com/question/15565069

3 0

2 years ago

Mrs. Washington has $265. She wants to buy shoes for $67 and dresses for $184. Does she have enough money? Explain answer.

nevsk [136]

No. She does not have enough money. She only has $251 and she needs at least $265 in order to buy the shoes.

6 0

3 years ago

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