(10%) The following medians were obtained from random samples1110139.713111281099.15714167121012891510126.7Do the data support the belief that the median is less than 10? Use a = .05

Given that : Sample size (n) = 30 Observation: XX X^2X2 1 11 121 2 10 100 3 5 25 4 13…

Answered: (10%) The following medians were…

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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Use a significance level of 0.05. Test the claim that the mean is that the stocks broke even(no gain or loss indicates a mean of 0). Data: -13.36,-21.84,-3.19,-9.22,6.31,-7.28,-9.23,-6.46,-11.73,-7.04,-4.01,3.90,-3.88,-12.85,-2.73,0.32,-14.36,-3.15,-5.90,21.05,-11.72,4.85,7.16,4.90,10.95,-10.97,-10.78,1.75,-0.29,-5.96
Consider the following data sets:Which of the two data sets has larger standard deviation? I II Both Can't tell
The following data show the number of hours spent watching television for 10 randomly selected freshmen attending a liberal arts college in the Midwest. Hours of Television Viewed Weekly 19 16 17 19 12 18 13 15 12 13 O Calculate the range, variance, standard deviation, and interquartile range for the sample data. The range for the data set is (Type an integer or a decimal. Do not round.)
0.5797 QUESTION 16 If the mean is 15 for the data : 16 10 7 20 y 25 find the median O 21 O 35 O 14 O 30 QUESTION 17
Using the following information select the number that better estimates the upper 90% confidence interval for the variance. Observation 1 2 3 4 5 6 22 O 4.7 4.4 40 27 19 7 8 9 10 11 Data 79 78 85 79 79 78 76 77 81 85 80
The following values represent the daily wages of a sample of workers, the sample mean is OMR 30. 27 45 12 42 24 15 45 The sample variance is: (Write only the number)
The number of points held by a sample of the NHL’s highest scorers for both the Eastern Conference and the Western Conference is shown below. At 0.01 level of significance,can it be concluded that the mean score of Eastern Conference is higher than WesternConference based on these data? Use P value method.Eastern Conference 83 60 75 68 78 69 70 68 62 61 59Western Conference 77 59 72 58 37 57 66 55 61
Which of the following statements regarding Z scores is FALSE? a. It indicates whether the raw score is above or below average. b. It indicates whether or not a distribution is skewed. c. It indicates the percentage of cases between that score and the mean d. It is sometimes referred to as a standard score
Tipping. In the article “Are Christian/Religious People Poor Tippers?” (Journal of Applied Social Psychology, Vol. 43, Issue 5, pp. 928–935), M. Lynn and B. Katz report that, for customers who receive bad service, the mean percentage tip is 8.56% of the bill with a standard deviation of 5.37%. Let x represent the percentage of the bill that a customer tips when he or she receives bad service. a. What percentage of tips for bad service are at least 0%? b. Assuming that x is approximately normally distributed, use normalcurve areas to determine the approximate percentage of tips for bad service that are at least 0%. c. Based on your results from parts (a) and (b), do you think that the percentage of the bill that a customer tips when he or she receives bad service is approximately a normally distributed variable? Explain your answer.
Consider the following distribution : 0-10 10-20 20-30 30-40 40-50 : f 12 18 20 25 23 Compute mean, median and mode.
Listed in the accompanying table are heights (in.) of mothers and their first daughters. The data pairs are from a journal kept by Francis Galton. Use the listed paired sample data, and assume that the samples are simple random samples and that the differences have a distribution that is approximately normal. Use a 0.05 significance level to test the claim that there is no difference in heights between mothers and their first daughters. Mother 64.0 66.0 63.0 62.0 66.5 66.0 65.0 60.0 67.0 63.0 Daughter 67.0 66.5 70.5 66.0 61.0 66.0 65.5 65.0 67.0 65.0 In this example, Hd is the mean value of the differences d for the population of all pairs of data, where each individual difference d is defined as the daughter's height minus the mother's height. What are the null and alternative hypotheses for the hypothesis test? Ho: Ha = 0 in. H₁ Hd 0 in. (Type integers or decimals. Do not round.) Identify the test statistic. t= (Round to two decimal places as needed.)
The mean number of sick days an employee takes per year is believed to be about 10. Members of a personnel department do not believe this figure. They randomly survey 8 employees. The number of sick days they took for the past year are as follows: 10; 5; 13; 3; 11; 8; 6; 9. Let X = the number of sick days they took for the past year. Should the personnel team believe that the mean number is about 10? Conduct a hypothesis test at the 5% level.Note: If you are using a Student's t-distribution for the problem, you may assume that the underlying population is normally distributed. (In general, you must first prove that assumption, though.) What is the test statistic? (If using the z distribution round your answers to two decimal places, and if using the t distribution round your answers to three decimal places.) t = Construct a 95% confidence interval for the true mean. Sketch the graph of the situation. Label the point estimate and the lower and upper bounds of the confidence…

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(10%) The following medians were obtained from random samples 11 10 13 9. 7 13 11 12 8 10 9 9. 15 7 14 16 7 12 10 12 8 9 15 10 12 6. 7 Do the data support the belief that the median is less than 10? Use a = .05