Question

In a study investigating the effect of car speed on accident severity, 5000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. For these 5000 accidents, the average speed was 43 mph and that the standard deviation was 12 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal.

(a) Roughly what proportion of vehicle speeds were between 31
and 55 mph? (Round the answer to the nearest whole number.)

Approximately %

(b) Roughly what proportion of vehicle speeds exceeded 55 mph?
(Round the answer to the nearest whole number.)

Approximately %

Answer #1

Ansb: proportion of vehicle speeds exceeded 55 mph is 16 %

In a study investigating the effect of car speed on accident
severity, 5000 reports of fatal automobile accidents were examined,
and the vehicle speed at impact was recorded for each one. For
these 5000 accidents, the average speed was 48 mph and that the
standard deviation was 16 mph. A histogram revealed that the
vehicle speed at impact distribution was approximately normal.
(a) Roughly what proportion of vehicle speeds were between 32
and 64 mph? (Round the answer to the...

In a study investigating the effect of car speed on accident
severity, 5000 reports of fatal automobile accidents were examined,
and the vehicle speed at impact was recorded for each one. For
these 5000 accidents, the average speed was 48 mph and that the
standard deviation was 14 mph. A histogram revealed that the
vehicle speed at impact distribution was approximately normal.
(a) Roughly what proportion of vehicle speeds were between 34
and 62 mph? (Round the answer to the...

In a study investigating the effect of car speed on accident
severity, 5,000 reports of fatal automobile accidents were
examined, and the vehicle speed at impact was recorded for each
one. For these 5,000 accidents, the average speed was 46 mph and
the standard deviation was 14 mph. A histogram revealed that the
vehicle speed at impact distribution was approximately normal. (Use
the Empirical Rule.)
A) Approximately what percentage of vehicle speeds were between
32 and 60 mph?
B) Approximately...

In a study investigating the effect of car speed on accident
severity, 5,000 reports of fatal automobile accidents were
examined, and the vehicle speed at impact was recorded for each
one. For these 5,000 accidents, the average speed was 46 mph and
the standard deviation was 13 mph. A histogram revealed that the
vehicle speed at impact distribution was approximately normal. (Use
the Empirical Rule.)
(a)
Approximately what percentage of these vehicle speeds were
between 33 and 59 mph?
approximately...

URGENTTT
1) In a study investigating the effect of car speed on accident
severity, 5,000 reports of fatal automobile accidents were
examined, and the vehicle speed at impact was recorded for each
one. For these 5,000 accidents, the average speed was 46 mph and
the standard deviation was 12 mph. A histogram revealed that the
vehicle speed at impact distribution was approximately normal. (Use
the Empirical Rule.)
(a) Approximately what percentage of vehicle speeds were between
34 and 58 mph?...

1. Let z denote a random variable having a normal
distribution with μ = 0 and σ = 1. Determine each of the following
probabilities. (Round all answers to four decimal places.)
(c) P(0.40 < z < 0.85)
=
(d) P(−0.85 < z < −0.40)
=
(e) P(−0.40 < z < 0.85)
=
2. Three friends (A, B, and C) will participate in a round-robin
tournament in which each one plays both of the others. Suppose
that
P(A beats B)...

What tools could AA leaders have used to increase their
awareness of internal and external issues?
???ALASKA AIRLINES: NAVIGATING CHANGE
In the autumn of 2007, Alaska Airlines executives adjourned at
the end of a long and stressful day in the
midst of a multi-day strategic planning session. Most headed
outside to relax, unwind and enjoy a bonfire
on the shore of Semiahmoo Spit, outside the meeting venue in
Blaine, a seaport town in northwest
Washington state.
Meanwhile, several members of...

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