Question 6The heights of students in a class are normally distributed with mean 68 inches and standard deviation 5 inches. Use the Empirical Rule todetermine the interval that contains the middle 95% of the heights.a) O [55, 81]b) O [58, 78]c) O [53, 73]d) O [53, 83]e) O [63, 73]f) O None of the aboveReview LaterQuestion 7

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Answered: Question 6 The heights of students in a…

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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9. Determines the average, median and standard deviation of each of the distributions to a variable (age, girl reaction time and boys reaction time).What interpretations can you make of it? B.) For each of the three two-variable distributions, make a graphical representation using a technological tool and calculate the values that can be used to interpret them. C.) Interpret graphic representations and draw conclusions.
7) At one college, GPA's have a distribution that is unimodal and symmetric with a mean of 2.6 and a standard deviation of 0.5. What is the range of GPA's from one standard deviation below the mean to one standard deviation above the mean? A) 2.6 to 3.1 B) 2.1 to 3.1 C) 0.5 to 3.1 D) 2.1 to 2.6
a) State the mean and standard deviation of the standard normal curve. b) Find the z-score for which 95% of the distribution’s area lies between –z and z. c) Extending the meaning in part b, only 2.5% of z-scores would lie above ________.
13) The following table presents the heights (in inches) of a sample of college basketball players. Height (in.) 68 - 71 72-75 76-79 80-83 84 - 87 Course Statistics Frequency Physics Sociology Literature Tennis a) Considering the data to be a population, approximate the standard deviation of the heights. Hint: Consider the rule of thumb, that is, range = 19 and s=4.75 148850 b) Approximate the mean of the heights. 14) A student received the following grades last semester. Find the student's semester grade point average. H 16 4532 70 1 60 Credits Grade/Points A / 4.0 F / 0.0 B / 3.0 B / 3.0 D / 1.0 Use the boxplot to identify the maximum value, minimum value, median, first quartile, third quartile, and interquartile range. 15) H 7 8 9 10 11 12 13 14 none min = 7 max=12 med=q Q1=8 Q3=11 IQR=Q3-21=11-8=3 16) In a poll of 522 university students, 219 said that they were opposed to legalizing marijuana. What is th probability that a surveyed student opposes legalization of marijuana?…
The average score on a communications exam was found to be 82 with a standard deviation of 5 points. Assuming these scores were normally distributed, what is the 10th percentile of these exams? a) 88.4 b) 1.28 c) 75.6 d) -1.28
A particular paper included the accompanying data on the tar level of cigarettes smoked for a sample of male smokers who subsequently died of lung cancer. Assume it is reasonable to regard the sample as representative of male smokers who die of lung cancer. Is there convincing evidence that the proportion of male smoker lung cancer deaths is not the same for the four given tar level categories at the ? = .05 level? (Use 2 decimal places.) Tar Level Frequency 0-7 129 8-14 324 15-21 543 22 153 ?2 = P-value interval p < 0.0010.001 ≤ p < 0.01 0.01 ≤ p < 0.05 0.05 ≤ p < 0.10 p ≥ 0.10
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1.Determines in a table, the average, median and standard deviation of each of the distributions to a variable (age, girl reaction time and boys reaction time).What interpretations can you make of it? A.) For each of the three two-variable distributions, make a graphical representation using a technological tool and calculate the values that can be used to interpret them. B.) Interpret graphic representations and draw conclusions.

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