400 students were randomly sampled from a large university, and 289 said they did not get enough sleep. Conduct a hypothesis tes
t to check whether this represents a statistically signi cant di erence from 50%, and use an signi cant level of 0.01.
1 answer:
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Answer:
or
Step-by-step explanation:
4x + 15 < 40
Subtract 15 from both sides
4x + 15 - 15 < 40 - 15
4x < 25
Divide both sides by 4
4x/4 < 25/4
x < 6.25
or
x < 6 1/4