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In: Statistics and Probability

Problems 6-10: In 2015 about 60% of college students used Twitter. In a recent study of...

Problems 6-10: In 2015 about 60% of college students used Twitter. In a recent study of

100 students, 80 now use Twitter. Is this evidence to think the percent has changed? We

wish to conduct a hypothesis test with 5% significance.

  1. State the null and alternative hypothesis.
  2. Find the test statistic and P-value and report those values here:
  3. What is the decision and conclusion?
  1. Now, construct a 95% confidence interval using the sample of 100 students and 80

saying they use twitter.

  1. Does the Confidence Interval support your decision for #8? Why or why not?
  2. (Bonus): What type of error could we have made in this anaylsis? (Type 1 or Type 2)

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orchestra answered 1 year ago
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