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The average cost of XYZ brand running shoes is $85 per pair (, with a standard deviation of $8 (σ = 8). If nine pairs of running shoes are selected (n = 9), find the probability that the mean cost of a pair of shoes will be less than $80: P(.Assume that the variable is normally distributed.
Identify the null and alternative hypothesis, test statistics, p-value or critical value(s), conclusion about the null hypotesis and final conclusion that address the original claim.
Repeating this experiment many times with different samples, what values for the sample means would be possible? What values would repeat more often?
The article "The Lead Content and Acidity of Christchurch Precipitation" (N. Zeal. J. of Science, 1980: 311- 312) reports the accompanying data on lead concentration (mg/L) in samples gathered during eight different summer rainfalls:
Compute, for this (approximately) binomial random variable, the various probabilities that X = 2 out of the sampled n = 10 when p = 0.1, p = 0.2 and p = 0.3. What does this indicate to you about the "more likely" value of p, for the tiger ..
heights of men on a baseball team have a bell shaped distribution with a mean of 183 cm and a standard deviation of 5
a srs of 21 orangutans is selected and 65 cc of blood is drawn from each orangutan using a 100 cc syringe. this method
Compare two month moving average also exponential smoothing using MAD. The subsiquent data represents demand for company ABC's products for the last 10 months.
Conduct a non directional test for a difference in response between the two sets of data. Use the Wilcoxon signed-ranks test and the 5% significance level.
Compare and contrast the areas of risk analysis which would be similar to both projects as well as the areas which will be different?
State the hypotheses. (b) State the decision rule and sketch it. (c) Find the test statistic. (d) Make a decision. (e) Estimate the p-value and interpret it. HeartRate.
The results of a survey for an airline are shown below. Use the chart to find the probability that the traveler was
List all samples of size 2, and compute the mean of each sample. Compute the mean of the distribution of sample means and the population mean. Compare the two values. Compare the dispersion in the population with that of the sample means.
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