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A soda bottling machine is filling 32 oz. soda cans. We observe the machine filling 35 bottles (picked at random) and obtain the following data:
32.12 32.04 32.04 32 32.01 32.12 32.0532.13 32.05 32.05 31.72 32.08 32.03 31.9532.02 32.22 32.22 32.22 31.89 32.2 32.2231.73 31.95 31.95 32.07 32.13 32.13 31.7331.98 32.21 32.21 31.97 32.09 31.97 32.12
As a bottler we want to know if the machine was underfilling. Setup Null and Alternate hypotheses to test if average amount of soda in each can is less than 32 oz. Please test the hypothesis using a = 0.05. What can you conclude from all this?
Compute the difference in traffic counts on the 6th and the 13th. Can you conclude that people tend to stay home more on Friday the 13th?
WHich sampling method from the choices listed above would be best? Describe how you would carry out your chosen sampling method of a student from part (a)
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
Construct a confidence interval for a level of confidence equal to 95%, we use z values that leave out, in the lower and the upper tails of the normal distribution, an area equal to?
From historical data, Harry's Car Wash estimates that dirty cars arrive at the rate of 10 per hour all day Saturday. With a crew working the wash line, Harry figures that cars can be cleaned at the rate of one every 5 minutes.
The following data were obtained from an independent measures study. Determine if there is a significant difference between the treatments. Use a significant level of .01.
Sampling area consisted of an area of 120m x 50m within site two and was bordered by a road on one side and a stream on another.
What is the mean of the sample means? e. What is the shape of the population distribution? f. What is the shape of the distribution of the sample mean? How do I pay the $20.
Randomly selected cans of Coke are measured for the amount of cola in ounces. The sample values listed below have a mean of 12.19 ounces and a standard deviation of 0.11 ounces. Use a 0.05 significance level to test the claim that cans of coke hav..
The test question was if this difference between the test statistics and the stated life of the battery was significant? The .05 significant level was selected for the test. Which is the correct statement?
What units represent the margin of error? Suppose you want to decrease the margin of error, but want to keep the 95% confidence interval. What do you need to do?
Assume men's weights are normally distributed w/ a mean of 172 lb. and a s.d. of 29lb.
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