Question

TRUE OR FALSE    

________ 69. It is possible to eliminate and measure nonsampling error.

________   70.     Type I and Type II errors can be eliminated through rigorous statistical analysis.

_____ ___   71.     The T-test is the statistical inference test to be used with sample sizes less than or equal to thirty respondents.

________   72.     The formula for calculating the difference between two percentages calculates a Z-value.

________   73.     Significant positive correlations are always causal.

Answer 1

Ans:

69)False,as non-sampling errors are often difficult to detect or identify, and it is impossible to eliminate them.

70)False,we can not eliminate Type I error and type II error,as decreasing the type I error will increase the type II error.

71)True,t-test can be used only when population is normally distributed for sample size,n<30 and population standard deviation is not known.

72)True,we use z statistic for hypothesis testing for difference in two proportions.

73)False,as Correlation does not mean causation.