RelativeHeights of adult males are known to have a normaldistribution. A researcher claims to have randomly selectedadult males and measured their heights with the resultingrelative frequency distribution as shown here. Identify twomajor flaws with these results.Height (cm) Frequency D130–14423%145–15924%160–17421%175–18926%190–20428%.....Select all that apply.A. The relative frequencies were recorded as percents instead of counts.B. All of the relative frequencies appear to be roughly the same. If they are from a normal distribution, they should start low, reach a maximum, and thendecrease.C. All of the relative frequencies are different. If they are from a normal distribution, they should all be exactly the same.D. The classes do not allow for the possibility that an adult male could be between 144 cm and 145 cm tall, or between 159 cm and 160 cm tall, and so on.E. The sum of the relative frequencies is 122%, but it should be 100%, with a small possible round-off error.F.The classes do not allow for the possibility that an adult male could be less than 130 cm tall or greater than 204 cm tall.

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Answered: Heights of adult males are known to…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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Problem 1P

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Under what circumstances would you consider the mean, the median and the mode be the most suitable averages to be used to describe the central tendency of distribution. Also highlight the desirable qualities of a good average.
5. Dust mite allergies. Refer to Exercises 4.2 (p. 138) and 4.13 (p. 143). Each home with a dust mite level that ex- ceeds 2µg/g will spend $2,000 for an allergen air purifica- tion system. Find the mean and variance of the total amount spent by the four sampled homes. Give a range where this total is likely to fall.
For a certain type of computers, the length of time between charges of the battery is normally distributed with a mean of 62 hours and a standard deviation of 11 hours. John owns one of these computers and wants to know the number of hours when the computer would have 12% of its battery life left. Sketch the region in question. Write a sentence describing what your answer represents about the problem's specefics.
Compare the appropriate measures of center and variability for the two sets of data. Data Set A has a higher mean value of 8.8, and Data Set B has a lower range value of 8. Data Set A has a higher median value of 9, and Data Set B has a lower IQR value of 2.5. Data Set A has a lower mean value of 8.8, and Data Set B has a higher range value of 8. Data Set A has a lower median value of 9, and Data Set B has a higher IQR value of 8.
AFDA Main Ideas: Module 9 Review 1) The measures of center: 2) Measures of spread: 3). When describing a data set, the mean is used with used with 4) Z-scores are used to compare data that is 5). What is the formula for finding the z-score? 14 6). The z-score of the mean is always z = 7). What are the characteristics of a normal distribution? and and and the median is 8). What two characteristics make a distribution go from "normal" to "standard normal?"
The accompanying technology output was obtained by using the paired data consisting of foot lengths (cm) and heights (cm) of a sample of 40 people. Along with the paired sample data, the technologgy was also given a foot length of 10.8 cm to be used for predicting height. The technology found that there is a linear correlation between height and foot length. If someone has a foot length of 10.8 cm, what is the single value that is the best predicted height for that person? H Click the icon to view the technology output. The single value that is the best predicted height is cm. Technology Output (Round to the nearest whole number as needed.) The regression equation is Height - 67.5 +5.15 Foot Length Predictor Coef SE Coef Constant 67.52 11.07 6.10 0.000 Foot Length 5.1508 0.4817 10.69 0.000 S-5.50271 R-Sq = 73.18 R-Sq (adj) = 72.44 Predicted Values for New Observations New Obs Fit SE Fit 95 CI 954 PI 123.149 1.605 (119.732, 126.566) (111.996, 134.302) Values of Predictors for New…
The heights of adult females are normally distributed. If you were to construct a histogram of 40 randomly selected women, what shape would the histogram of those heights have and what pattern would you expect in a normal quantile plot of these data? A) The histogram would be approximately bell-shaped, and the normal quantile plot would have data points have follow a straight-line pattern. B) The histogram would by approximately bell-shaped, and the normal quantile plot would have data points that would be bell-shaped. C) The histogram would by non-symmetric, and the normal quantile plot would have data points that would be non-linear. D) The histogram would by approximately bell-shaped, and the normal quantile plot would have data points that would be non-linear.
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Suppose the distribution of heights of a group of 300 children is normal, with a mean of 150 centimeters and a standard deviation of 12 centimeters. About how many of these children are taller than 162 centimeters? children
It seems that of engaged women buy a wedding dress at least one size smaller than their current size. Why? Cornell researchers reported an alarming tendency for women who are engaged to sometimes attempt to lose an unhealthy amount of weight prior to their wedding (Neighbors & Sobal, 2008). The researchers found that engaged women weighed, on average, 152.1 pounds. The average ideal wedding weight reported by 227 women was 136.0 pounds. The data below represent the fictional weights of eight women on the day they bought their wedding dress and on the day they got married. Did women lose weight for their wedding day? Dress purchase Wedding day 163 158 144 139 151 150 120 118 136 132 158 152 155 150 145 146 Conduct the six steps of hypothesis testing using a one-tailed test and an alpha level of 0.05. Report the test statistic in APA format. Calculate the confidence interval for the paired-samples t test that you conducted in part (a). Compare the…
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Heights of adult males are known to have a normal distribution. A researcher claims to have randomly selected adult males and measured their heights with the resulting relative frequency distribution as shown here. Identify two major flaws with these results.