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In given Exercise, if the sample size had been n = 5 instead of n = 30, what assumption would have to be made about the population distribution of filling weights in order to use z values in constructing the confidence interval?
Exercise A machine that stuffs a cheese-filled snack product can be adjusted for the amount of cheese injected into each unit. A simple random sample of 30 units is selected, and the average amount of cheese injected is found to be = 3.5 grams. If the process standard deviation is known to be σ = 0.25 grams, construct the 95% confidence interval for μ = the average amount of cheese being injected by the machine.
A study wants to examine the relationship between student anxiety for an exam and the number of hours studied. The data is as follows: Why is a correlation the most appropriate statistic
Tread wear was found to be 80,000 miles with a standard deviation of 5,600 miles. What is the best estimate of the average tread life in miles for the entire population of these tires?
A retail store manager is trying to estimate the average purchase transaction amount for a particular store. She takes a sample of 35 transactions and determines the mean purchase transaction amount from this same is $85 with a standard deviation ..
a quality control inspector will sample products obtained from a manufacturing process until two noncomforing products
Correlation between the two variables based on scatter plot - Show the scatter plot for the variables.
We say that two things have a positive relationship if they move in the same direction, or as one thing increases, so does the other. Or if one thing decreases, so does the other.
A standard deviation of 12. If the data for both tests are normally distributed, on which test did the student score better relative to the other students in each class?
What is the variation in ‘False rejects' that is NOT attributable to the Inspectors (as Sum of squares, not as percentage or mean)?
Perform a hypothesis testing using data from this study, Suggest another statistical technique(s) for the purpose of this study. Explain.
First National Bank and City National Bank are competing for customers who would like to open IRAs. 32 weeks are randomly selected for First National Bank and another 32 weeks are randomly selected for City National.
Describe the distribution and summarize the important features. What is it about running that might account for the shape you see?
a group of twelve people want to sit around a round table with twelve seats. we dont care who is facing what
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