Question 927316
In an article published last year, the Federal Transportation Department claimed that Southwest Airlines suffers from a 7% rate of no-shows. That is, the article claimed that 7% of the people who make reservations for Southwest 
------------------------------
Six months ago, a new procedure was instituted whereby reservations on Southwest Airlines flights are confirmed via a text, an email, and a voice mail on the day preceding the actual flight. A study is then made of 5218 randomly selected reservations made under the new system. If 338 no-shows are recorded, does the new system seem to have resulted in a lower no-show rate than the one published in last year’s Federal Transportation report?
Sample proportion:: p-hat = 338/5218 = 0.065
--------------------------------------
Include each of the following in your analysis: 1) a symbolic statement of the null and alternative hypotheses, 
Ho: p >= 0.07
Ha: p < 0.07 (claim)
------------------------------
2) a symbolic statement comprised of the correct mathematical symbols depicting the specific probability of an event that the P-value represents
z(0.065) = (0.065-0.07)/sqrt[0.07*0.93/5218] = -1.416
p-value = P(z < -1.416) = 0.078
---------------------------------------
 3) a justification of the shape of any distribution you use, 
ribution
normal distribution
--------------------------------------
4) the calculator function (plus the values you’re entering into that function) you’re using to get the requested value,
normalcdf(-100,-1.416) 
--------------------------------------
5) the level of significance, &#945;, that you are choosing to perform your hypothesis test with, 
alpha = 5%
--------------------------------------
6) a statement conveying whether-or-not there is enough evidence to reject the null hypothesis, and 
Since the p-value is greater than the p-value, fail to reject Ho.
---------------------------------------
7) a context-based complete, narrative, plain-English sentence that answers the question that was asked(this sentence must not contain statistical jargon such as “fail to reject the null hypothesis” or “accept the alternative hypothesis,” for example).
-------
an H.
The test results do not support the claim that p < 7%
-----------------------------------------
Cheers,
Stan H.
St