Find the percent of her laps that are completed in less than 132 seconds. (Round your answer to two decimal places.) % O Part (d) The fastest 4% of her laps are under how many seconds? (Round your answer to two decimal places.) séc O Part (e) Enter your answers to two decimal places. The middle 75% of her lap times are from seconds to seconds.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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I've been trying to solve these 3 questions but keep getting them wrong. Can someone explain how I solve these three parts, please? I'm not sure what I'm doing wrong

Terri Vogel, an amateur motorcycle racer, averages 129.71 seconds per 2.5 mile lap (in a seven-lap race) with a standard deviation of 2.28 seconds. The distribution of her race times is normally
distributed. We are interested in one of her randomly selected laps.
Part (a)
Part (b)
Part (c)
Find the percent of her laps that are completed in less than 132 seconds. (Round your answer to two decimal places.)
Part (d)
The fastest 4% of her laps are under how many seconds? (Round your answer to two decimal places.)
sec
Part (e)
Enter your answers to two decimal places.
The middle 75% of her lap times are from
seconds to
seconds.
Additional Materials
Transcribed Image Text:Terri Vogel, an amateur motorcycle racer, averages 129.71 seconds per 2.5 mile lap (in a seven-lap race) with a standard deviation of 2.28 seconds. The distribution of her race times is normally distributed. We are interested in one of her randomly selected laps. Part (a) Part (b) Part (c) Find the percent of her laps that are completed in less than 132 seconds. (Round your answer to two decimal places.) Part (d) The fastest 4% of her laps are under how many seconds? (Round your answer to two decimal places.) sec Part (e) Enter your answers to two decimal places. The middle 75% of her lap times are from seconds to seconds. Additional Materials
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