T1.Q3) A university class ckntained 60 femalestudents. they were asked to report theirhieghts (in cm), with the following results.n=60 mean=163.39 standard deviation=8.681) within what range would you expect 95% ofthe heights to lie?2) Find the z-score of Jenny, a female studentwhose height is 155.22cm. Approximatelyhow many students are shorter than Jenny?3) Tina has a height of 195cm. what is her z-score? Approimately how many students inthe class do you think would be taller thanTina?

The question about normal dist. Given : No. of female students ( n ) = 60 Mean of the heights ( μ )…

Answered: T1.Q3) A university class ckntained 60…

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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According to an automobile association, the average cost of a gallon of regular unleaded fuel at gas stations in a certain month was $2.825. Assume that the standard deviation of such costs is $0.15. Suppose that a random sample of n = 100 gas stations is selected from the population and the month's cost per gallon of regular unleaded fuel is determined for each. Consider x, the sample mean cost per gallon. Complete part a through d. Click the icon to view the table of normal curve areas. a. Calculate P and o
A livestock company reports that the mean weight of a group of young steers is 1121 pounds with a standard deviation of 79 pounds. Based on the model N(1121,79) for the weights of steers, what percent of steers weigh a) over 900 pounds? b) under 1200 pounds? c) between 1150 and 1250 pounds?
Given that it is normally distributed with a standard deviation of 8.025 cm. Find the range of the diameter that is two standard deviations from themean. Hence, state the proportion of the tubes with the diameters inthis range.
4. From the data given below, find the number of items. Er = 90 r = 0.5 Exy = 120 Oy = 8 (where x and y are deviations from arithmetic average).
A variable is normally distributed with mean 17 and standard deviation 8. Use your graphing calculator to find each of the following areas. Write your answers in decimal form. Round to the nearest thousandth as needed. a) Find the area to the left of 16. b) Find the area to the left of 13. c) Find the area to the right of 15. d) Find the area to the right of 19. e) Find the area between 13 and 28.
A livestock company reports that the mean weight of a group of young steers is 1172pounds with a standard deviation of 70pounds. Based on the model N(1172,70)for the weights of steers, what percent of steers weigha) over 1100pounds?b) under 1250pounds?c) between 1200 and 1300 pounds?
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3. In a normal frequency distribution of serum sodium concentrations, the mean is 141 mEq/L and the standard deviation is 3.2 mEq/L. Which of the following most closely represents the percentage of values in the interval between 137.8 mEq/L and 144.2 mEq/L? OA) 25% B) 50% C) 65% OD) 95% OE) 99% 456
A group of high school seniors took a scholastic aptitude test. The resulting math scores had a mean 470.5 with a standard deviation of 171.8, verbal scores had a mean 476 with a standard deviation of 187.6, and the correlation between verbal and math scores was r=0.786. Complete parts a through f below. a) What is the correlation? The correlation is (Round to three decimal places as needed.) b) Write the equation of the line of regression predicting verbal scores from math scores. (Round to three decimal places as needed.) c) In general, what would a negative residual mean in this context? O A. A negative residual means the student has a higher verbal score than the linear model would predict. O B. A negative residual means the student has the exact verbal score that the linear model would predict. OC. A negative residual means the student has a lower verbal score than the linear model would predict. d) A person tells you her math score was 611.Predict her verbal score. The student is…

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