From the course: Statistics Foundations 3: Using Data Sets
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One-tailed vs. two-tail tests
From the course: Statistics Foundations 3: Using Data Sets
One-tailed vs. two-tail tests
- Let's consider three different statements. First, a recent national study has found that the average American between the ages of 18 and 24 checks their phone 74 times per day. A mobile service provider questions these results. Second, the average amount of time it takes an adult to recover from the common cold is 8.5 days. A new medicine was tested on a sample of adults suffering from the common cold. The average recovery time for the people in this group was 6.2 days. The pharmaceutical company manufacturing the medicine believes it should receive government approval. Third, the national average for a college entrance exam is 1,000 points. The Regent Test Prep Academy claims that their students consistently beat the national average. These are all situations where hypothesis testing would be useful, but each of these situations would require a different type of hypothesis test. Let's look at each situation individually.…
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