.Tweet tweet: 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 samples 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 = 0.05 level of significance.

MATLAB: An Introduction with Applications
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21. Tweet tweet: 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
samples 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 = 0.05
level of significance.
Transcribed Image Text:21. Tweet tweet: 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 samples 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 = 0.05 level of significance.
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