Arandom sample of 30 airline flights during a storm had a mean delay of 40 minutes with a standard deviation of 5 minutes. a. w hat parameter are we wanting to estimate ? u se symbolic notation. b. w hat is the point estimate ? u se both the symbolic notation and the value. c. calculate t he 95 % one - sided upper confidence interval of the population mean delay time during the storm. d. i nterpret the interval in context of the original problem.
Given that a random sample of 30 airline flights during a storm had a mean delay of 40 minutes with a standard deviation of 5 minutes.
n =30: Sample mean = 40 and sample std dev s = 5
a) The population mean delay time we want to estimate
b) Point estimate = sample mean=
c) Std error of sample =
df = 39
t critical value for 95% one side = 1.684
Margin of error =
Confidence interval one tailed = (40, 41.537)
We are 95% confidence that at random for samples of large size, the mean delay time would be within 40 and 41.537
i dont understand the question? ?