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(a) How many standard deviations (of X ) below the null value is x=72.3 ? (Round your answer to two decimal places.) standard deviations (b) If x=72.3, what is the conclusion using =0.01 ? (Round your answers to two decimal places.) test statistic z= critical value z= What can you conclude? Reject the null hypothesis. There is sufficient evidence to conclude that the mean drying time is less than 74. Do not reject the null hypothesis. There is not sufficient evidence to conclude that the mean drying time is less than 74 . Do not reject the null hypothesis. There is sufficient evidence to conclude that the mean drying time is less than 74. Reject the null hypothesis. There is not sufficient evidence to conclude that the mean drying time is less than 74. (c) What is for the test procedure that rejects H0 when z2.64 ? (Round your answer to four decimal places.) = (d) For the test orocedure of part (c), what is (70) ? (Round your answer to four decimal places.) (70)= (e) If the test procedure of part (c) is used, what n is necessary to ensure that (70)=0.01 ? (Round your answer up to the next whole number.) n= specimens