Be certain to frame the question (include the null and alternate hypotheses, alpha, and test), what the data tells us (decision criteria-test statistics or p-value methods), conclusion, and interpretations for your decisions.

Part A

Use the traditional method for this test of hypothesis. During a recent year the average cost of making a movie was $54.8 million.This year, a random sample of 15 action movies had an average production cost of $59.3 million with a standard deviation of 9.5 million.Can it be concluded that it costs more than the average to produce an action movie?

Part B

FACEBOOK:In 2014, Facebook reported that 23% of its users were ages 18 - 24, a decrease from the 2011 level of 30.9%.(Though this is partly due to more older people joining Facebook, there was nevertheless a loss of over 3 million users in this age group.)In 2015, a survey of 500 randomly selected Facebook users showed that 105 of them were ages 18 - 24.Test whether the population proportion of Facebook users who are ages 18 - 24 has decreased from 23%.

Thank you!