QUESTION 7 In which of the following problems, would using degrees of freedom be necessary? a....
QUESTION 12 Which of the following distribution's shape does not change with degrees of freedom? a. Studentt b.z c. Chi-square d.F e. the distribution shape does not depend on degrees of freedom.
Which of the following is not true for Degrees of Freedom the number of independent pieces of data being used to make a calculation the number of degrees of freedom is related to how certain a sample is representative of the entire population Degree of Freedom is sample size (n) minus one Degree of Freedom depends on the number of approximation or estimation used to make a calculation What is the relation between Z distribution and t distribution? Z and...
Which of the following is true of the degrees of freedom, k, if you find them by taking the smaller of n1 and n2 1 when n1 n2? O A when you use this estmate for k. youre less lkely to reject a talse nuli hypothesis OB. This method for estimating kgives a relatively high power of the test O C. This is the same statistic you'd get if you used software to calculate degrees of freedom. O D. It's...
QUESTION 5 Which statement concerning the t-distribution is false? O AT follows a standard normal distribution OB. The smaller the degrees of freedom the flatter the curve. OC. The t-distribution has a larger standard deviation than the Standard Normal Curve. OD. T-distributions have a mean of 0. o E. The total area under the density curve depends on the degrees of freedom. QUESTION 6 The t-procedures are robust when A. sample size is 12 and the sample data is not...
proof for distribution of (n-1)S^2/sigma^2 is the chi square distribution with n-1 degrees of freedom. I don't understand the expansion of the square, specifically how certain terms disappeared and how a sqrt(n) appeared. Also towards the end, why does V have a degree of freedom of 1? x A detailed explanation of what happened from step 2 to step 3 would be very helpful! THEOREM B The distribution of (n − 1)S2/02 is the chi-square distribution with n – 1...
Quiz: Chapter 7 Review Quiz Submit Quiz This Question: 1 pt |0 of 16(0complete) ? This Quiz: 16 pts possible Refer to the accompanying data display that resuilts from a sample of airport data speeds in Mbps. Complete parts (a) through (c) below EB Click the icon to view a t distribution table 13.046,22.15) x 17 598 Sx 16.01712719 n 50 #0 Round to two decimal places as needed ) c. Give a brief general description of the number of...
Justify using the knowledge from the unit sofar, anticipate the distribution of (Xn -n/ V2n when n is large, where Xn denotes a random variable which is a x 2 with n degrees of freedom. 4) bet Van ol nt nC How are people getting the highlightedterm? I don't understand wherethe e Van is coming from or whythey are doing Mxlt/V2n)? And why is Mzlt) and multiplication of this two and how do you know that. Can someone explain that...
If np 25 and nq 25, estimate P(at least 7) with n= 13 and p=0.4 by using the normal distribution as an approximation to the binomial distribution; if np < 5 or nq < 5, then state that the normal approximation is not suitable. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. P(at least 7) = (Round to three decimal places as needed.) OB. The normal distribution cannot be...
1. A 5 kg block sits at rest on an inclined ramp with friction which makes an angle of 38 degrees with respect to the horizontal. What is the magnitude of the frictional force? O A. 50 N OB. 45 N C. 40 N D. 35 N E. 30 N F. 27 N O G. 25 N O H. 20 N © I. 15 N o J. Not enough information is given to answer this question.
Question 27 (2 points) Saved Which of the following substituents will not direct the incoming group to the ortho/para position during electrophilic aromatic substitution? Oa) -OCOCH3 Ob) -COOCH3 Oc) -CH2CH3 Od) -N(CH3)2 Question 28 (2 points) Saved Provide the reagents necessary to carry out the following conversion. OH OH Br Br Br Oa) Br2, hn Ob) HBr (3 moles) O c) Br2, FeBr3 o d) Br2