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Please answer and justify your work for this document in the next 12 hours.
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(a) (‘3) True or False. Justifi; for fix! 1 credit. (a) [fP(A) = 0.4, P(B) = 0.5, and A and B are independent, then P(A AND B) = 0.9. (b) If the variance of a data set is 0, then all the observations in this data set must be zero. (c) The mean is always equal to the median for a normal distribution. (d) A 95% confidence interval is wider than a 90% confidence interval of the same parameter. (e) [n a two-tailed test, the value of one test statistic is 2. The test statistic follows a
distribution with the distribution curve shown below. If we know the shaded area is 0.03,
then we have sufficient evidence to reject the null hypothesis at 0.05 level of significance. Choose the best answer. Justzfizjbrfull credit. Among the Senators in the current Congress, 54% are Republicans. The value 54% is a
(i) statistic (ii) parameter (iii) cannot be determined The hotel ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is
(i) interval (ii) nominal
(iii) ordinal
(iv) ratio In a career readiness research, 100 students were randomly selected from the psychology
program, 150 students were randomly selected from the communications program, and 120
students were randomly selected from cyber security program. This type of sampling is called: (i) cluster (ii) convenience
(iii) systematic
(iv) stratified

 
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