cween -2 to +1?Question 7 of 15The tail ends are extended indefinitely in both sides, but do not meet the x-axis, although they get decreasingly closer.Select the correct response:TrueFalse( PreviousQuestion 8 of 15dard deviation.The area under the normal curve is 10.Select the correct response:TrueFalseQuestion 9 of 15co +1?Based on Empirical Rule, how many percent will lie between -3 to +3?Select the correct response:49.5%99%100%( PrevQuestion 10 of 15value of the probability area isThe area under the curve indicate probability.Select the correct response:TrueFalse

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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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The time between requests to a web server is exponentially distributed with a mean 0.5seconds.a. What is the value of the parameter λ?b. What is the standard deviation?
If income is normally distributed with mean at 50,000 and standard deviation at 10,000, how much of the population makes less than $75,000? (hint: find out the z score of 75,000. Then use the table below to find the area to the left of that z score)
A random sample of exam scores has a sample mean of x¯=85 and sample standard deviation of s=3. Use the Empirical Rule to estimate the percentage of scores that are less than 76. Round your answer to the nearest hundredth.
On a recent calculus exam, a class mean was 75 with a standard deviation of 3.4. Calculate the z-score (to 2 decimal places) for a person who received score of 71.
The mean and standard deviation for the exam results from a class of 135 students were calculated, mean = 74 SD = 11 with a normal distribution. How many students would be expected to have a mark between C and A (60 & 90)? Hint: you need to calculate the z-score for both grades to get the total area. Once again can't have part of a student.
On a recent calculus exam, a class mean was 73 with a standard deviation of 2.7. Calculate the z-score (to 2 decimal places) for a person who received score of 71.z-score: Is this unusual? Unusual Not Unusual
In a particular statistics exam, the 15th percentile of final exam score is 30, and the 85th percentile of final exam score is 90. A histogram of the scores approximately follows the normal curve. What is the approximate standard deviation of the final exam scores? Hints: What is the z value in the normal table that gives you closest to 70% of the area between -z and z? Now what does that tell you about the number of SDs in between 30 inches and 90 inches? You might find it helpful to draw a picture of the normal curve with original units and standard units. Group of answer choices 14.3 28.6 57.2 10.9
In a particular statistics exam, the 15th percentile of final exam score is 30, and the 85th percentile of final exam score is 90. A histogram of the scores approximately follows the normal curve. What is the approximate standard deviation of the final exam scores? Hints: What is the z value in the normal table that gives you closest to 70% of the area between -z and z? Now what does that tell you about the number of SDs in between 30 inches and 90 inches? You might find it helpful to draw a picture of the normal curve with original units and standard units. a. 14.3 b. 57.2 c. 28.6 d. 10.9

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The tail ends are extended indefinitely in both sides, but do not meet the x-axis, although they get decreasingly closer. Select the correct response: True False