Answer to Question #173602 in Statistics and Probability for ANJU JAYACHANDRAN

Question

10. Which of the following statements are true? Give reasons for your answer. (10)

(i) F-distribution is always used in goodness of fit.

(ii) Measure of central tendency in a data set refers to the extent to which the

observations are scattered.

(iii) A process is said to be under assignable cause when the points are above the VCL

link of ( chart. X,R)

(iv) Simple random sampling is done by using random number tables where the

probability of drawing a digit is .1 0⋅

(v) All time series have a trend.

Answer 1

(i) False, The best goodness of fit is in $\chi$ distribution.

(ii) True, Central tendency in a data set refers to the extent to which the observation are scattered.

(iii) True, The points above the ALC line generally represents under assignable cause.

(iv) False, Simple random sampling is done by deciding the sample size from the population first.

(v)True, All time series have a noise, white trend. Because with the help these trends we are able to predict future values.