The data concerning height measurement for a random sample of individuals from a given populationare as follows:Mean is equal to172S.D. is equal toN is equal toIf a large number ofsamples of the same size were selected at random from the given population,what would be the limits within which the true mean almost certainly lies?1265

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Answered: The data concerning height measurement…

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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Which of the following is a good point estimator for the population mean? O S O 2 42 S 2 X I.
Suppose that for a test of proportion we have :p=0.5 and . The test statistic z=1.53 and the p-value is reported as P-value = 0.063. Find the error in the reasoning. This is a right-tailed test so the P-value should be 0.9370. This is a two-tailed test so the P-value should be 0.126. The P-value should have been calculated using the studentâ s t-distribution. There is no error in the reasoning. None of these.
For questions 6 through 11, refer to the following table, representing responses from the 2018 GSS: Respondent Sex Mean Hours Worked Last Week Standard Deviation N Male 44.60 14.969 670 Female 38.15 13.276 711 6. What proportion of females worked less than 40 hours per week? a. How many people in the sample does that correspond to?7. What percentage of males worked between 40 and 50 hours per week? a. How many people in the sample does that correspond to?8. What number of hours worked among females corresponds with a Z score of -2.00?9. Calculate the number of hours worked last week that corresponds to the 95th percentile for each sex. a. If you were going to calculate the 75th percentile, what Z value would you use? 10. Calculate the standard error for both males and females. a. What are you using for sigma, and why? 11. Calculate the 95% confidence interval for each sex. Can you say with 95% confidence that they are different? Why or why not? a. If you were…
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Q.9. Calculate missing frequencies from the following when mean is 13-75. No. of students : 4 8 10 12 18 24 22 frequency : 13 11 9 8 10
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What is the mean squar error for the followin data set x y -2 4 -1 2 0 2 1 1 2 1
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A company decides to investigate the amount of sick leave taken by its employees. A sample of seven employees yields the following numbers of days of sick leave taken in the past year. 1 1 3 0 0 63 Use this information to answer parts a through c. a. Find and interpret the range. The range is 6 days. Choose the correct interpretation of the range below. A. The largest difference between the mean and any other value is equal to the range. B. The number of days separating the fewest and most sick days taken is equal to the range. C. The range represents the average distance of an observation from the mean. D. The range gives the most useful value for measuring the spread of the data.
Which of the following statements is not true? There is only one median for each variable. One definition of the median states that, for an odd number of observations, the median is the middle score when scores are placed in order of magnitude. Another term for the median is 50th percentile. The median is generally more sensitive to (i.e., affected by) the presence of a few extreme observations than is the mean.
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Which of the following statements is correct? A. sigma is the average distance between an individual in a population and the population mean. B. s is the average distance between an individual in a sample and the population mean. C. sigma/√n(or sigma √n if sigma is unknown) is the average distance between a sample mean of size n and the population mean. D. Both A and C.

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