Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) throughe) below.TIntervalE Click the icon to view at distribution table.(13.046,22. 15)x = 17.598Sx = 16.01712719n= 50a. What is the number of degrees of freedom that should be used for finding the critical value ta/2?df =(Type a whole number.)b. Find the critical value ta/2 corresponding to a 95% confidence level.ta/2=0(Round to two decimal places as needed.)c. Give a brief general description of the number of degrees of freedom.O A. The number of degrees of freedom for a collection of sample data is the total number of sample values.O B. The number of degrees of freedom for a collection of sample data is the number of sample values that can vary after certain restrictions have been imposed on all data values.O C. The number of dearees of freedom for a collection of sample data is the number of sample values that are determined after certain restrictions have been imposed on all data values.(?Click to select your answer(s).O vi 8:581ODII&%232478695.6#3 (lype a whole number.)b. Find the critical value ta/2 corresponding to a 95% confidence level.ta/2=D(Round to two decimal places as needed.)c. Give a brief general description of the number of degrees of freedom.O A. The number of degrees of freedom for a collection of sample data is the total number of sample values.O B. The number of degrees of freedom for a collection of sample data is the number of sample values that can vary after certain restrictions have been imposed on all data values.O C. The number of degrees of freedom for a collection of sample data is the number of sample values that are determined after certain restrictions have been imposed on all data values.O D. The number of degrees of freedom for a collection of sample data is the number of unique, non-repeated sample values.Click to select your answer(s).DELLesc&%232478.6t口个

Name: Refer to the accompanying data display that results from a sample of
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Description: Refer to the accompanying data display that results from a sample of airport data speeds in Mbps. Complete parts (a) throughe) below.TIntervalE Click the icon to view at distribution table.(13.046,22. 15)x = 17.598Sx = 16.01712719n= 50a. What is the

Given that Sample Size(n) = 50 Confidence level (C) = 95% = 0.95 Now, Level of significance(α) =…

Answered: at distribution table.

Math

Statistics

at distribution table.

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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Statistics teacher realize that his students keep using cell phones during the class. Then he did some research and found out that people use cell phones for 7.2 hours per day on average, and usage time variability around that average is 2.0449. Then he decides to give an assignment of reading books as an alternative of cell phone usage in exchange of 50 extra credit to their statistics exam. After the exam, he collected the data of cell phone usage time from his 127 students and calculated the average cell phone usagetime drops to 6.8 hours per day. a) Under the assumption that probability of uncontrolled factors leading you the wrong statistical decision is five percent, conduct the statistical analysis to decide wheter decrease in the cell phone usage time is real or it happens just because of the random chance b)and interpret the results