Trueorfalse:

a. In a regression of y on x, if the p-value for the intercept is 0.01, then there is a statistically significant association between x and y.

b. Rank tests should not be used if data are not normally distributed.

c. Thestandarderror helps us determine how far off an estimator might be from what it is trying to estimate.

d. Anoutlier tends tocausemoreproblemsina rank testthanina t-test.

e. An F-test should not be used to compare more than 4 groups.

f. ifthesensitivityofascreeningtestis95%andthediseaseisveryrare,thentheprobabilityyouhave thedisease,giventhatyougotapositivetest,willalsobecloseto95%.

g. Aconfidenceintervalforasinglemeangivesarangeofplausiblevaluesforthe samplemean.

h. In logistic regression of y on x, the regression coefficient is the odds ratio for a 1 unit increase in x.

i. In survival analysis, censored observations should be eliminated before any analyses are conducted.

j. Ifa95%confidenceintervalforadifferenceinmeanbloodpressurebetweentreatmentandplacebogroupsis(-3.68, -0.93),thena2-tailedtestatalpha=.05wouldrejectthenullhypothesisthatthegroupsarethesame