The random variable x known to be uniforms distributed between

IS kn . between 80 to 95 is own to be umfomfly dlstribmed between 70 d a 0.75 - an 90. The probability of b. 05 c. 0.05 c 0.6990 d O,6789 8)The expected value of the random variable 5': is a. the standard error b. the sample size 0 the size of the population d. None of these alternatives is correct. 9) From a population of 200 elements, a sample of 49 elements is selected. It is determined tha the sample standard deviation is 14. The standard error of the mean is a.3 b. 2 ' c. greater than 2 d. less than 2 i' Using OL = 0.04, a confidence interval for a population proportion is determined to be ' n anee is decreased, the interval for the population proportion fi Vi SAW, IV, In. .;;;mue Mamas narrower h. Wmas wider