Acompany produces steel rods. the lengths of the steel rods are normally distributed with a mean of 236.8-cm and a standard deviation of 1.3-cm. for shipment, 29 steel rods are bundled together. find the probability that the average length of a randomly selected bundle of steel rods is between 236.5-cm and 236.7-cm. p(236.5-cm < m < 236.7-cm) =

On a certain portion of an experiment, a statistical test result yielded a p-value of 0.21. what can you conclude? 2(0.21) = 0.42 < 0.5; the test is not statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 21% of the time, so the test is not statistically significant. 0.21 > 0.05; the test is statistically significant. if the null hypothesis is true, one could expect to get a test statistic at least as extreme as that observed 79% of the time, so the test is not statistically significant. p = 1 - 0.21 = 0.79 > 0.05; the test is statistically significant.