please answer all or bottom half ..ooo T-Mobile 11:42 AM 21%) Done 11 of 11 lf y

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please answer all or bottom half

..ooo T-Mobile 11:42 AM 21%) Done 11 of 11 lf you get a 2 value of 5.6 with a goodness-of-fit test for a die (with , we fail to reject the null hypothesis that the die is fair. The degrees of freedom for both t models and 2 models grow with le size. ) The F-test is always a one-tailed test. ) For a paired t-test, the differences must be independent. ) The F-test tests the null hypothesis that all the group means are equal the one-sided alternative that they are not all equal. t) If residual analysis after a chi-square test of homogeneity produces a value (standardized residual) for a cell, this means that the expected was greater than the observed count. t) Paired t-tests are always two-sided. t) When we use the formula Var(X +Y) Var(X) + Var(Y) to compute riance of X - Y, we don't assume X and Y are independent. t) A large margin of error means that we have a confidence interval that es less information about the parameter. nt) Increasing the sample size decreases the power of the test. nt) An observational study in which subjects are selected and previous ions or behaviours are determined is called a retrospective study nt) When neither the subject nor the persons in charge of evaluation of re- e know what group a subject belongs to, this is a double-blind experiment.

Explanation / Answer

Ans:

1)F test is always a one tailed test(true)

2)A large margin of error means that confidence interval contains the less information about the parameter.(true,as there is more chance of error,may be due to larger standard deviation,multiplier(t or z),sampe size,n)

3)Increasing sample size increase the power of the test.(true,as when sample size is large,test statistc will be large,so,null hypothesis is more likely to be rejected,so type II error decreases and power of the test increases.)

4)Retrospective study:A retrospective study looks backwards and examines exposures to suspected risk or protection factors in relation to an outcome that is established at the start of the study.(true)

5)Double bind experiment:an experimental procedure in which neither the subjects of the experiment nor the persons administering the experiment know the critical aspects of the experiment; "a double-blind procedure isused to guard against both experimenter bias and placebo effects"(true)

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