problem, a police officer conducts 10 traffic stops per day Monday thru
Wednesday, for a total of 30 traffic stops. This was done in order to collect
data and help prove his hypothesis that more than 50% of people wear their
seatbelts. Each stop only had one occupant in the vehicle. Stops 6, 7, 8, and 9
on Monday resulted in four people not wearing their seatbelts. On Tuesday,
stops 4 and 9 occupants were not wearing seatbelts for a total of two people.
On Wednesday, Stops 1, 7 and 8 were not wearing seatbelts for a total of three people
that were unbelted. This means that 9 out of 30 people were not wearing
Using the calculator or Excel(mega stat)
calculate the Descriptive Statistics indicating the values of central tendency,
dispersion, the 5 number summary data and the Empirical Rule percentages. Find the range rule of thumb and compare to the Empirical rule percentage
Sketch a histogram and a box plot of your
data. Analyze your results comparing
the central tendencies and the dispersion values to the graphs. Locate the CT’s on the histogram. Find the coefficient of skewness. Or if your
project involves comparing two sets of data, sketch the scatter plots needed to
show the correlation.
Find the Margin of error and the 95% confidence
interval and state the confidence interval conclusion.
Choose a claim regarding your data and complete
a hypothesis t test or z test for your study.
Indicate the following information: state the null hypothesis and alternate
hypothesis calculate the critical value, find the test statistic t or the
p-value and whether to reject or not
reject the null hypothesis. Draw the
normal curve indicating the reject and do not reject regions and values. State
your hypothesis conclusion .
Write a conclusion of the hypothesis, do more
than 50% of all people wear their seatbelts