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Data are drawn from a relatively symmetric and bell-shaped distribution with a mean of 35 and a standard deviation of 2.
What percentage of the observations fall between 33 and 37?
What percentage of the observations fall between 31 and 39?
What percentage of the observations are less than 33?
Test at 5% significance level null hypothesis that population mean is 40 hours against alternative that it is higher.
Should Martha use an independent-samples t-test or a related samples t-test? Explain your answer.
Assume that a decision maker wants to estimate a population proportion with 90% confidence and a margin of error of ±0.03. The decision maker has obtained a pilot sample of 10.
When trying to understand the stroke data, what would be the advantage of looking at a histogram instead of this frequency distribution?
Define the variable - the weight in pounds - it is a dependent variable. Find the mean, median, mode, variance, and standard deviation for your data.
Find the P value for the indicated hypothesis test with the given standardized test statistic, z. Decide whether to reject H0 for the given level of significance deviation. Two-tailed test with test statistic z= -2.43 and standard deviation = 0.04..
data are gathered regarding the length of tenure top executives have at a major corporation and whether those
an insulated 8-m3 rigid tank contains air at 600 kpa and 400 k. a valve connected to the tank is now opened and air is
Interpret the y-intercept of the line.
If PV is a tree before observing the evidence, then we would like PV PV |A= a to be also represented as a tree. Is this always possible?
a company that sells an online course aimed at helping high-school students improve their sat scores has claimed that
Assuming an exponential service rate μ, set this up as a birth and death process and determine the birth and death rates.
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