Random samples of size 525 are taken from a process (an infinite population) whose population proportion is 0.3. The standard deviation of the sample proportions (i.e., the standard error of the proportion) is O 0.2100 O 0.3000 O 0.0200 O 0.0004

If the mean of a T-distribution is negative, O a mistake has been made in the computations, be use the mean of a T-distribution can not be negative O The mean can be any number - positive or negative. Even zero O the standard deviation must also be negative O the variance must also be negative The time taken to bake a clay mold for a slag-pot is uniformly distributed between 62 and 97 minutes. What will be the probability that the next clay mold will take between 77.7 and 102.8 minutes?

M P(A) = 0.80, P(B) = 0.65, and P(A u B) = 0,78, then P(B | A) = O 0.6700 O 0,9750 O 0.8375 O Not enough information is given to answer this question.