3 years ago

I really don't understand this honestly. Please help lol

Mathematics

1 answer:

klasskru [66]3 years ago

6 0

Answer:

300

Step-by-step explanation:

I t is good

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Bother rectangles could be divided into 8 parts.

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The distribution of passenger vehicle speeds traveling on a certain freeway in California is nearly normal with a mean of 73.7 m

Schach [20]

Answer:

A) 90.32%

B) 90.11%

C) 81.546 miles per hour

D)77.93%

Step-by-step explanation:

Given data:

speed = 73.7 miles/hour

standard deviation = 4.77 miles /hour

a) $P(X< 80) = P(z< \frac{80 - 73.7}{4.77}$

= P (z< 1.31)

= 0.90320 = 90.32%

b) $P(60 < X< 80) = P(\frac{60 - 73.7}{4.77} < z< \frac{80 - 73.7}{4.77})$

= P (-2.872< z< 1.31)

= P (z<1.31) - P(z<-2.87)

= 0.90320 - 0.00205

= 0.90115 = 90.11%

c) P(X <X) = 0.95

z = 1.645

$\frac{x - 73.7}{4.77} = 1.645$

x = 81.546 miles per hour

$d)P(X< 70) = P(z> \frac{70 - 73.7}{4.77})$

= P (z> -0.775)

= 0. 0.7793 = 77.93%

4 0

3 years ago

Help I'm still confused no need to explain.

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Answer:

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Step-by-step explanation:

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