5. The average life of an electric scooter is 15 years with a standard deviation of 1.75 years. Themanufacturer replaces for free all scooters that fail while under a guarantee. If she is willing to replace5.0% of the scooters that fail, how long of a guarantee (in years) should she offer? You may assumethat the lives of the scooters are normally distributed.

Mean()=15standard deviation()=1.75

Answered: 5. The average life of an electric…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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1.The test scores of Biostatistics examination follows a normal distribution with a mean of 60 and a standard deviation of 5. What is the standard score of those who got 50? a.1 b.-1 c.2 d.-2 2.The test scores of Biostatistics examination follows a normal distribution with a mean of 60 and a standard deviation of 5. What is the probability that the student got a score of below 55? a.0.3413 b.0.8413 c.0.1587 d.0.6587
The value of Fcalc increases as A. variability due to chance decreases B. variability due to chance increases C. as the number of observations in each group decreases D. cannot be determined since F is fixed
Solve it correctly both subparts
A variable is normally distributed with a mean of 15 and a standard deviation of 4. a. Find the percentage of all possible values of the variable that lie between 10 and 23. b. Find the percentage of all possible values of the variable that are at least 7. c. Find the percentage of all possible values of the variable that are at most 8.
PLS. Solve Quickly Applications Problems According to a Sallie Mae survey and credit bureau data, in 2008, college students carried an average of $3173 debt on their credit cards (USA TODAY, April 13, 2009). Suppose that cur- rent credit card debts for all college students have a normal distribution with a mean of $3173 and a standard deviation of $800. Find the probability that credit card debt for a randomly se- lected college student is between $2109 and $3605.
Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 132 millimeters, and a variance of 64. If a random sample of 39 steel bolts is selected, what is the probability that the sample mean would be greater than 128.2 millimeters? Round your answer to four decimal places. Answer How to enter your answer (opens in new window) Keypad Keyboard Shortcuts Tables
4b.) Draw the graphs. Round your final answers up to 6 decimal places, if applicable. Give the correct units.
9a. For binomially distributed data set, approximately what proportion would be below the mean and also within one standard deviation? 16.5%,25%,33%,50%,66%
B Choosing a topic Sk.. For data that is not normally distributed we can't use z-scores. However, there is an equation that works on any distribution. It's called Chebyshev's formula. The formula 1 where p is the minimum percentage of scores that fall within k k2 is p = 1 - standard deviations on both sides of the mean. Use this formula to answer the following questions. a) If you have scores and you don't know if they are normally distributed, find the minimum percentage of scores that fall within 2.2 standard deviations on both sides of the mean? b) If you have scores that are normally distributed, find the percentage of scores that fall within 2.2 standard deviations on both sides of the mean? c) If you have scores and you don't know if they are normally distributed, how many standard deviations on both sides of the mean do we need to go to have 64 percent of the scores? Note: To answer part c you will need to solve the equation for k.
please see pictures. questions A, B and C
Direction: Solve the following problems. Identify the given and provide the correct illustrations for each situation. Problem: The IQ of 100 STEM students in ZNHS are found out to be normally distributed, having a mean of 110 and a standard deviation of 10. a. If a scholarship is offered to students with IQ higher than 115, What is the percentage of qualified STEM students. b. if University of the Philippines requires at least an IQ of 100 for admission, how many of STEM students may be admitted? c. If University of the Philippines gives scholarship to the top 10% of the group, find the least IQ a ŠTEM student must have to avail scholarship.
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