Question 5*:The average number of students atUniversity attending the MATH1130 lecture in the 2021 Fall term is 7.а.Give a reasonable bound for having less than 10 students attended the last MATH1130 lecture in the 2021 Fall term.b. It is also reported that the standard deviation of the number of students attending theMATH 1130 lecture is 2. Give a reasonable bound for having at least 1 student butnot more than 13 students attended the last MATH 1130 lecture in the 2021 Fall term.

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Answered: Question 5*: 1130 lecture in the 2021…

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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Suppose that the recovery time from the infection with a certain virus is normally distributed with a mean of 6.5 days and a standard deviation of 1.5 days. Answer each question. Draw a graph illustrating the recovery time. Make sure to indicate 3 standard deviations from the mean. P(X>7.3)=? P(X <4.7)=? P(5.1<X<7.7)=? John's recovery time is lasting more than 9.2 days. Is it unusual (and should he be concerned yet)? What is the middle 90% recovery time? What is the 80%tile recovery time?
Suppose the mean monthly return on a T-Bill is 0.5% with a standard deviation of 0.58%. Sup-pose we have another investment Y with a 1.5% mean monthly return and standard deviationof 6%. Which of the two investments o ers less risk in terms of investment.
Please answer ASAP
I don’t get why the Standard deviation for 3a is 50.61. How do you calculate it
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A quantity measured 50 times results in a mean x=23.345 +/- 0.0022 What is the standard deviation? What number of measurements will cut the standard deviation of the mean half? If a 100 measurement are taken, what is the new standard deviation?
Q2. Assume we have two populations represent the mercury contamination (g/Km3) in two different European cities. The mean of mercury contamination in the first city is 50 g/Km3 with standard deviation of 1O, and mean of mercury contamination in the second city is 40 g/Km3 with standard deviation of 8 g/Km3. If a sample of n=9 is taken form first city and a sample of n=16 is taken form second city, what is the probability that the difference between these two sample means is less than 9 g/Km3? 0.0614 0.0359 0.3985 0.0992 0.6015
The arithmetic mean and standard deviation of a series of 20 items were calculated by á/ student as 20 cm and 5 cm. respectively. But while calculating them an item 13 was misread as 30. Find the correct arithmetic mean and standard deviation.
In one math class, the first exam had an average score of 81.2% with a standard deviation of 10.9%. The second exam had a mean score of 79.3%, with a standard deviation of 19.9%. Based on these numbers, tell whether each statement is true or false. 1. There were probably some students that took a zero on Exam 1. The statement is ▼(Choose one(True/False)). 2. Most students did better on the second exam. The statement is ▼(Choose one(True/False)).

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