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Sedaia [141]
2 years ago
12

A test was done to look at the maximum speed of mopeds. They found that the maximum speed had a normal distribution with a mean

of 29 mph and standard deviation of 1.4 mph. Consider randomly selecting a moped.
a. What is the probability that the maximum speed is at most 31 mph?
b. What is the probability that the maximum speed is at least 29.8 mph?
c. What is the probability that maximum speed differs from the mean value by at most 1.5 standard deviations?
d. Suppose we select 49 mopeds, what is the probability that the sample mean will be at least 29.5 mph?
Mathematics
1 answer:
Ksenya-84 [330]2 years ago
8 0

Answer:

C

Step-by-step explanation:

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We'll solve that in parts.

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The bottom of that figure is made of 3 parts.

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B) a 2 by 2 square whose area equals 2*2 = 4

C) a 6 by 2 right triangle whose area equals (6*2) / 2 = 6

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Step-by-step explanation:

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Answer:

Yes

Step-by-step explanation:

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If number of trials is atleast 30 we can expect reliable results.

Here the results are recorded for 120 times at random.

Since number of trials is large, we can expect a reliable and accurate results representing the actual probability.

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8 0
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Alex

Answer:

the domain is {0, 1, 2, 3, 4... to positive infinity}

The range is {-1, -3, 0, -4 and so on}

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Step-by-step explanation:

domain is a set of all x values, so just write the x values based on the graph

range is a set of all y values, so just write y values based on the graph

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