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A statewide survey of 1,706 California adults’ residents include the following question: would you favor or oppose providing a path to citizenship for illegal immigrants in the U.S if they met certain requirement including a waiting period, paying fines and back taxes, passing criminal background checks and learning English? What is the margin of error at the 95% confident level?
83 % Favor, 16% Oppose, 1% Don’t Know
No estimate of the population proportion is available. How large a sample is required?
Assuming that the variability is unchanged (i.e., σ = 6), is there sufficient evidence to suggest that the strength of the product has increased at the 1% level of significance?
Run an ANOVA using only groups 1 to 6 (You can hide group 7 from the analysis by data followed by select cases and then you filter out group 7 by if GROUP~= ). Also run the posthoc tests LSD and Bonferroni.
How large a sample is required to estimate the mean speed with a margin of error equal to 2 miles per hour with 90% confidence?
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Can we conclude at the 5% significance level that the population mean weight of athletic men is lower than the population mean weight of non-athletic men?
Now make a scatter plot of data from 1982 to 1998 (again, use years since 1800). Determine a linear, power, or exponential model that explains the crude oil production during this time period.
Calculate probability that the sample would have a mean:
Linear programming problems. Computethe following linear programming problem. Among which of the following points (X,Y) is feasible.
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
What is sampling with replacement, and why it is used?
Find the alternative would be chosen according to expected value and utility.
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