Tweet tweet: An article reported that 73% of companies have Twitter accounts. An economist thinks the percentage is lower at technology companies. She samples 70 technology companies and finds that 45 of them have Twitter accounts. Can she conclude that less than 73% of technology companies have Twitter accounts? Use the a = 0.01 level of significance and the critical value method. Part 1 of 5Part20f5 Find the critical value. Round your answer to at least three decimal places. The critical value is l '. Part3 of5 Compute the test statistic. Do not round intermediate steps. Round the answer to at least two decimal places. z=l l 7 X S n_..a. A .:r