Fill This Form To Receive Instant Help

Help in Homework
trustpilot ratings
google ratings


Homework answers / question archive / According to the National Highway Traffic Safety Administration, 80% of all U

According to the National Highway Traffic Safety Administration, 80% of all U

Statistics

According to the National Highway Traffic Safety Administration, 80% of all U.S. drivers use their
seat belts. A statistician decides to test this claim against the suspicion that the percentage is too high.
The statistician randomly surveys 1500 U.S. drivers and determines that only 1170 drivers stated they
use their seat belts when driving. The statistician decides to perform the 5 step hypothesis test at
α = 5% to determine if it is reasonable to reject the National Highway Traffic Safety Administration's
claim.
I. State the hypotheses (in words & symbols):
H0: _____________________________________________________________________________________
Ha: ___________________________________________________________________________________

II. Determine the model to test H0
a) Can you use a normal distribution for the Hypothesis Testing model to perform this test?
Please explain your answer. If not, then what distribution could you use as the Hypothesis Testing model?
_____________________________________________________________________________________

b) Using the appropriate notation, state the MEAN & STD ERROR of the sampling distribution:
Mean: (to 2 decimal places) _____________________________________________________________
STD Error: ( to 4 decimal places) __________________________________________________________


III. Determine the Decision Rule:
State the decision rule: _________________________________________________________________

IV. Analyze the sample data: Using the appropriate notation, state the following:
sample result (to 4 decimal places) is: ___________________________________________________
p-value (to 4 decimal places) is: ________________________________________________________
test statistic (to 2 decimal places) is: ____________________________________________________


Draw & Label the Hypothesis Testing Model below
showing the decision rule, critical value(s) & test statistic on the diagram. 

 

V. State the Conclusion: 

Purchase A New Answer

Custom new solution created by our subject matter experts

GET A QUOTE