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The quality assurance department for Pepsi Distributors, Inc. maintains meticulous records on the bottling line for two-liter Pepsi bottles. Records indicate that the process follows the normal probability distribution with a mean amount per bottle of 2.01 liters and a standard deviation of 0.025 liters. The foreman randomly selects 25 bottles from the bottling line and determines that the mean amount per bottle is 2.005 liters.
a. Compute the sampling error.
b. Compute the standard error of the sampling distribution of sample means.
c. Compute the probability that the sample of 25 bottles would have a mean of 2.005 liters or more.
A teacher divides her class into two groups. One group is taught a lesson on the computer and the other is taught by traditional lecture. The teacher then gives a test to see that group has better grades.
Find the probability of committing a type I error.
Dinner B which costs $135.30 for dinner submitted by salesperson with mean cost of $117.50 and standard deviation of $30 per dinner?
Would it be reasonable to conclude that the population mean is 63 pounds?
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
High levels of cockpit noise in an aircraft can damage the hearing of pilots who are exposed to this hazard for many hours
Perform hypothesis testing on one variable's data.
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
As we can say there is 5.5 percent chance of seeing the current policy having an effect on smog in the results we observed from natural sampling variation.
Calculate the coefficient of skewness and coefficient of variation of minutes spent commuting. What do these statistics tell us?
Make for more scatter plots comparing GDP growth 1970-2000 to corruption, political rights, rule of law, and socio-political instability
At the .05 significance level, is there a difference in the mean number of calls per day between the two employees?
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