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This week dicussion topics are: Inferential Statistics, Confidence Interval for Population Mean, t-Distribution.
Pages 305-308, 311-315, 320-322, 325-329.
YouTube Video Clips
After reading required for this week study material,
let's discuss following topics.
To get full credit you should post your comments to any two of these topic.
In a production facility, an accurate estimate of man hours needed to complete a task is crucial to management in making such decisions as the proper number of workers to hire, an accurate deadline to quote a client, or cost-analysis decisions reg..
in a large section of a statistics class the points for the final exam are normally distributed with a mean of 72 and a
Would you expect the variance to be larger or smaller than the variance associated with the probability function used in the previous exercise? Verify your answer by computing the variance.
Is there any evidence to suggest that the variability in checked baggage weight is different for these two airlines? Use a = 0.05 and assume normality.
You do not need to collect data and actually conduct the test calculations. Rather,state the claim, define the null and alternate hypotheses, identify the test significance and the test statistic, and state the decision rule that will be used.
A company that manufactures precision special-alloy steel shafts claims that the variance in the diameters of shafts is no more than 0.0003. A random sample of 10 shafts gave a sample variance of 0.00027. At the 5% level of signi?cance, test wheth..
what effect does the sample size have upon the maximum error of
If the daily stock price, x, of United Technology is normally distributed with mean 6.56 and standard deviation 2.4, calculate the probability that in a randomly selected ay the price will be between $3.25 and $7.36. Hint: Review normal distribution
What is the probability that the mean life-span of a sample of 64 randomly selected bulbs will exceed 727 hours?
One student in the class wondered whether the correlation coefficient was reliable; that is, would a nonzero correlation be found in other classes? How can reliability be determined without calculating an r on another class?
What is the confidence level? A sample of 45 eggs yields a mean of 1.37 ounces. Assume that the standard deviation is 0.53 ounces what is the margin of error at the 95% confidence level.
a coin is tossed three times.1. what is the probability that the coin will land heads at least twice?2. what is the
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