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1. You saw 3 inferential tests last week Large sample Z small sample tThink of a measurable problem you know of and tell whether you would use a Z test or a t test Tell me why ( more than just being driven by sample size ) and describe the hoped for result 2. Paired sample means tests are used when there is no historical data. Give me one example and some rationale where you would see a reason for wanting to use a paired sample means test 3. A typical recommendation from an inferential test is to either not Reject the null implying no statistical difference in the means or to reject implying there is a statistical difference in the means. Usually the person giving the recommendation will include the confidence level ( aka the Alpha ) and will usually say "with a small chance of statistical error"What is this statistical error and what do you think about this thing called error?4. You just finished getting your data, made sure there were no fliers and the data was correct You created a mean and standard deviation and ran your Z test at the 0.05 alpha Your decision rule is 1.645 and your Z test statistic ( step 3 ) is 1.647
What do you do ( reject or not ) and how do you feel about your decision
The next 20% a B, the next 42% a C, the next 18% a D and the bottom 12% an F. What average must you exceed to obtain an A?
Taking α to be 0.05, what is/are the critical values associated with testing your hypothesis?
On a test with a population mean of 75 and standard deviation equal to 16, if the scores are normally distributed, what percentage of scores fall below a score of 83.8?
The number of customers who have requested a reservation at full fare for this flight in the past always has a normal distribution with mean 40 and standard deviation 10. Determine how many seats should be reserved for customers who pay full fare.
Extreme value or is it a fairly typical sample mean? For a sample of n=36 scores, would a sample mean of M=55 be considered an extreme value or is it is fairly typical sample mean?
Recognize sample, population, sample statistic, and population parameter: Nasonex is the drug used to treat allergy symptoms.
Compute z values for each and comment on your findings.
Different methods - a traditional method, and a web-based self-paced method. Can he conclude, at α = .05, that the test scores in the web-based self-paced method are lower?
Use the population mean and standard deviation to find the z-score corresponding to 14.5%, the rate offered by the Bar Harbor Bank and Trust Company. Is this above or below the average?
Sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours. with a ,95 probability, the margin of error is approximately.
The following is the number of minutes to commute from home to work for a group of automobile executives.
Determine a 95% confidence interval for true mean cost to repair this type of car.
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