Suppose that a poll taken 10 years ago found that 56% of parents spank their children. Suppose a recent poll of 500 adults with children finds that 247 indicated that they spank their children. Complete parts (a) and (b) below.

(a) Assuming parents' attitude toward spanking has not changed since the original poll, how many of the 500 parents surveyed would be expected to spank their children?

The expected amount of parents surveyed that would spank their children is

(Round to the nearest whole number as needed.)

(b) Do the results of the survey suggest that parents' attitude toward spanking may have changed since the original poll? Why?

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.