1 (14 pts) True/False problems a) (T, F) The change of a value over a time perio

Question

1 (14 pts) True/False problems a) (T, F) The change of a value over a time period can be effectively shown by a pie chart b) (T, F) If a population follows a normal distribution, we can always use a.z-test, mot t-test (e) CT, F The degree of freedom is reduced when we do a paired b-iest compared to when we (d) (T, F) Histogram, outlier and Pearson Coefficient of skewness can be collectively wod s do a two-sample t-test test if a population follows a normal distribution. (T, F) Skewness indicates how the data points are close to each other (e) (f) (T, F) we use the ?2-test when we compare the variances ofrwomples (e) (T, F) When we are to test if the mean values of three sanples ave the we use ANOVA test

Explanation / Answer

a) False ; as pie chart shows current situation

b)False ; we can use t distribution always if normal distribution

c) true ; as in paired test ; sample are dependnent

d)True

e) false

f) False ; tto compare variance of two sample we use F test

g) True

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