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A random sample is taken from a population. The data points are:
5 4 9 2 1
a) What is the mode?
b) Calculate the unbiased estimate for the population variance.
c) Another random sample is taken from the population with an unbiased estimate of the population variance of 9.2. Does this result imply anything about whether the estimator is truly unbiased or not? Explain your answer.
d) A random sample of 92 observations is taken from another population. The sample mean is 5.5. The unbiased estimate for the population variance is 6.4. Test whether the population mean is equal to 3 or not at a significance level of 5%.
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Caselet on McDonald’s vs. Burger King - Waiting time
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Problems on Sampling Variability and Standard Error and Confidence Intervals
Estimate the population mean
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
Find out the probability
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