The data is the number of bags of doughnuts produced per month by Namiki Bakery in 2010. Pretend that the data is normally distributed.
n _________ Determine the sample size n for the data.
x = _________ Determine the sample mean x for the data.
sx = _________ Determine the sample standard deviation sx for the data.
z = _________ Calculate the z-score for the number of bags of doughnuts produced in December.
______________ Is the December production run usual or unusual?
p(bags ≤ 8815) =
_________ Use the normal distribution function NORMDIST to calculate the population percent of months that produce 8815 or fewer bags of doughnuts.
p(bags ≥ 19271) =
_________ Use the normal distribution function NORMDIST to calculate the population percent of months that produce 19271 or more bags of doughnuts.
p(8815 ≤ bags ≤ 19271) =
_________ Use the normal distribution function NORMDIST to calculate the population percent of months that produce between 8815 and 19271 bags of doughnuts.
p(bags ≤ __________) = 0.20
Use the normal distribution inverse function NORMINV to calculate the number of bags BELOW which are found the 20% lowest production of doughnut bags.
Part II: Chapter 8 Use the sample size and standard deviation from part I. Presume that the data is normally distributed.
SE = _________ Calculate the standard error for the doughnut bags data.
Part III: Chapter 9 Use the data and results above in this section.
df = _________ Calculate the number of degrees of freedom..
t_{c} = _________ Calculate t_{critical} using a 95% level of confidence.
E = _________ Calculate the margin of error for the mean E.
p(__________ ≤ μ ≤ __________) = 0.95 Calculate the 95% confidence interval for the mean.