X 16-3 Homework Chapter 7 (Sectic xQuestion 3-6-3 Homework: Cha x+o.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launch Url=https%253A%252F%252Fnewconnect.mheducation.com%252F#/activity/que...<ework: Chapter 7 (Sections 7.1 through 7.4)SavedHelp Save & Exit SubrCheck my woJoan's finishing time for the Bolder Boulder 10K race was 1.80 standard deviations faster than the women's average for her age group.There were 380 women who ran in her age group. Assuming a normal distribution, how many women ran faster than Joan? (Rounddown your answer to the nearest whole number.)Number of women3 of 8< PrevNext >www

Answered: Joan's finishing time for the Bolder…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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A teacher weighed the backpacks of 4 students. Here are the weights (in kilograms): 5,7,9,11 which of these formulas gives the standard deviation?
Each of the 5 cats in a pet store was weighed. Here are their weights (in pounds). 13, 12, 5, 12, 9 Find the median and mean weights of these cats. If necessary, round your answers to the nearest tenth. (a) Median: pounds X Ś ? (b) Mean: pounds
Q2: The number of stories in the 10 tallest buildings for two different cities is listed below. Which set of data is better on the average and which set is more variable? 50 34 Houston: 71 64 56 53 55 47 55 52 50 Pittsburgh: 54 40 32 46 44 42 41 40 40
The number of hours per week that the television is turned on is determined for each family in a sample. The mean of the data is 3131 hours and the median is 27.227.2 hours. Twenty-four of the families in the sample turned on the television for 1616 hours or less for the week. The 7th percentile of the data is 1616 hours. What is the value of the 50th percentile?
Which of the following is not an aspect involved in computing the sum of products ( SP) of deviations? a. dividing by the total number of participants b. subtracting the total sum of squares collapsed across all scores c. adding the total X and Y scores across all participants d. multiplying the X and Y scores together for each participant
A veterinarian recorded how many kittens were born in each litter. This data is summarized in the histogram below. (Note: The last class actually represents "7 or more kittens," not just 7 kittens.) QUESTIONL: What is the frequency of the litter having at most 2 kittens? (PHOTO ATTACHED)
Thirty-one percent of adults think that life existed on Mars at some point in time. You randomly select 6 adults and ask them if they think life existed on Mars at some point in time. Find the mean, variance, and standard deviation for the number adults that think life existed on Mars at some point in time. Round your answer to 1 decimal place.
A class of students took a test. The instructor said that the 75th percentile score was 90 out of 100. What does this mean? A. 90% of the students scored 75 or more on the test. B. 75% of the students scored 90 or more on the test. C. 25% of the students scored 90 or more on the test. D. The high score in the class was (.75)(90).
Winston has just gone grocery shopping. The mean cost for each item in his bag was $3.48. He bought a total of 9 items, and the prices of 8 of those items are listed below: $2.75,$4.06,$3.16,$3.92,$4.29,$2.77,$3.01,$4.57 Determine the price of the 9th item in his bag.
An incoming freshman took her college's placement test in French and she scored 82 points. The overall results on the French test had a mean of 72 and a standard deviation of 8. Scores were normally distributed. Find the percentage of the students who scored higher than 82 points using your normal table. Write your answer without the % sign as a numerical value, for example write 52.7 for 52.7%.
In a psychology class, 40 students have a mean score of 89.5 on a test. Then 24 more students take the test and their mean score is 78.3.What is the mean score of all of these students together? Round to one decimal place.
The distances golf balls travel under laboratory testing conditions are normally distributed. The mean is 312 yards. The probability the golf ball travels further than 319 yards is 0.28. Find the probability a randomly selected golf ball travels between 305 yards and 319 yards. Express the answer as a decimal value rounded to the nearest hundredth.

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