A survey was conducted among the employees of a certain company and they were asked about their weekly travelexpenses. A random sample of 20 employees had the following answers:120, 85, 94, 67, 112, 88, 92, 110, 125, 70, 83, 90, 84, 86, 94, 112, 92, 90, 78, 100Which of the following is not true?(A) The mode is not unique.B The distribution is leptokurtic.The range is 58.(D The distribution is positively skewed.

Answered: Image /qna-images/answer/e7014f67-f72b-49bf-80a3-7c2f74292a20.jpg

Answered: A survey was conducted among the…

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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The average final exam score for the statistics course is 75%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is different. The final exam scores for the 11 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 63, 72, 88, 50, 76, 88, 85, 55, 52, 61, 71 What can be concluded at the the a = 0.05 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: H.: Select an answer v H1: ?vSelect an answer v c. The test statistic ?v (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? va f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the population mean is not significantly different from 75 at a =…
In a class of 50 students, every student took a certain a test which was out of 100 marks. Among all the students, 40% of them got 80, 30% of them got 72, 20% of them got 61 and rest of them got 53 marks. i. What is the expected mark of a student taking that test? ii. What is the expected mark of a student if he/she takes the test thrice? iii.What is the variance of marks of a student?
The average final exam score for the statistics course is 76. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is higher. The final exam scores for the 11 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 72, 57, 82, 52, 72, 73, 67, 61, 66, 52, 77 The null and alternative hypotheses would be: Hn: ?v Select an answer Ha: ? Select an answer V
One hundred draws are made at random with replacement from a box with the following 4 tickets: 1, 2, 2, 5. For each description, choose the plot that matches it. One plot will not be used. (ii) (ii) The histogram for the numbers drawn in the sample. [ Choose ] The probability histogram for the [ Choose ] sample sum.
The average final exam score for the statistics course is 74%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is lower. The final exam scores for the 11 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 76, 78, 77, 67, 63, 79, 50, 63, 70, 63, 66 What can be concluded at the the a = 0.01 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ?v Select an answer Hj: ? vSelect an answer v c. The test statistic ? v (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? va f. Based on this, we should Select an answer |the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the populaton mean is significantly lower than 74 at a = 0.01, so…
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The average wait time to get seated at a popular restaurant in the city on a Friday night is 15 minutes. Is the mean wait time different for men who wear a tie? Wait times for 15 randomly selected men who were wearing a tie are shown below. Assume that the distribution of the population is normal. 13, 13, 14, 13, 17, 16, 17, 17, 13, 14, 15, 14, 16, 15, 14 What can be concluded at the the a = 0.10 level of significance level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ?v Select an answer v H1: Select an answer v c. The test statistic ? v = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? v a f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the population mean is not significantly different from 15 at a = 0.10, so there is statistically insignificant…
The average final exam score for the statistics course is 74%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is lower. The final exam scores for the 12 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 51, 86, 77, 86, 66, 59, 66, 76, 55, 59, 57, 80 What can be concluded at the α = 0.10 level of significance? For this study, we should use Select an answer t-test for a population mean z-test for a population proportion H0:H0: ? μ p Select an answer = ≠ > < H1:H1: ? p μ Select an answer = > < ≠ The test statistic ? t z = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.)
Section of an oil field has been divided into 48 equal sub-areas. Counting the oil wells in the 48 sub-areas gives the following frequency distribution : Number of 0 1 2 3 4 5 6 7oil wellsNumber of 5 10 11 10 6 4 0 2sub-areasIs there any evidence from these data that the oil wells are not distributed randomly throughout the section of the oil field?

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