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23 Nov 2021
Given information
Instructions: For the following ten exercises,
Hypothesis testing: For the following ten exercises, answer each question.
State the null and alternate hypotheses.
State the p-value.
. State alpha.
. What is your decision?
Write a conclusion.
Answer any other questions asked in the problem.
According to the Center for Disease Control website, in at least of high school students have smoked a cigarette. An Introduction to Statistics class in Davies County, KY conducted a hypothesis test at the local high school (a medium sized–approximately students–small city demographic) to determine if the local high school’s percentage was lower. One hundred fifty students were chosen at random and surveyed. Of the students surveyed, have smoked. Use a significance level of and using appropriate statistical evidence, conduct a hypothesis test and state the conclusions.
Step-by-step explanation
Step 1.
We are given to use a left-tailed test. That’s why the alternative hypothesis has sign. Reject the null hypothesis if
and .
The following formula is used,
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