Historically, at the Newport Department Store, the proportion of delinquent accounts has been 14%. Newport conducted a customer communication campaign to try to reduce this percentage. After the campaign, Newport randomly selected 250 customer accounts and found that 30 were delinquent. Which of the following test statistics would be used to find the p-value to use when testing the hypothesis "the campaign had an effect" vs. "the campaign did not have an effect"?

The box plots show the distributions of the numbers of words per line in an essay printed in two different fonts.which measure of center would be best to compare the data sets? the median is the best measure because both distributions are left-skewed.the mean is the best measure because both distributions are left-skewed.the median is the best measure because both distributions are symmetric.the mean is the best measure because both distributions are symmetric