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1. What is the difference between a one-tail and a two-tail test? How do we identify each?
2. What is meant by a p-value?
3. A basketball player has hit on 60% of her shots from the floor. If on the next 100 shots she makes 70 baskets, would you say her shooting has improved? Use a .05 level of significance.
4. An electrical firm manufactures light bulbs that have a length of life approximately normal with a mean of 800 hours and a standard deviation of 40 hours. Test, at a .05 level of significance, whether or not a sample of 36 bulbs with an average life of 788 hours has a µ equal to 800 hours.
For the samples summarized below, test the hypothesis at =0.05 that the two variancees are equal.
Convert Alisha's grandmother's score to a z score among the distribution of exercise capacity in Americans over seventy years old. Who has a relatively longer exercise capacity compared to her peers-Alisha or her grandmother?
The sales of Lexus automobiles in the Detroit area follow a Poisson distribution with a mean of 3 per day. What is the probability that for five consecutive days at least one Lexus is sold?
In addition, the cruise line has decided to plan for an additional 25% more meals than bookings. Formulate the appropriate linear program and solve using Excel Solver. Show your Work in Excel.
Calculate the expected value and standard deviation of the value.
Determine the test statistic. At 95% confidence, test to determine if more than 21% of the population will like the new soft drink.
When filter permits spam to slip through into your inbox, which type of error is that? Which type of error is it when the real message gets classified as junk?
Determine for each variable if it is the explanatory variable, the response variable, or whether it could be both.
For its validity, all hypothesis testing depends heavily on the assumption that the sample that is used was drawn using probability sampling techniques.
Sample data was collected in a study of calcium supplements and their effects on blood pressure. A placebo group and a calcium group began the study with blood pressure measurement.
Using the finite population correction factor, compute the standard error for each of the three firms given a sample of size 50.
For the set of data below construct a grouped frequency distribution that as well contains the real limits of each interval, midpoint of each interval, the cumulative frequency,
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