an article in Forbes magazine reported that 73% of fortune 500 companies have Twitter accounts. A economist thinks the percentage is higher at technology companies .she sample 70 technology companies...

an article in Forbes magazine reported that 73% of fortune 500 companies have Twitter accounts. A economist thinks the percentage is higher at technology companies .she sample 70 technology companies and finds that 55 of them have Twitter accounts .can she conclude that more than 73% of technology companies have twitter accounts? Use the a=.05 level of significance