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1. Hemoglobin levels in 11-year-old boys vary according to a normal distribution with σ=1.2 g/dL.
a) How large a sample is needed to estimate µ with 95% confidence, so the margin of error is no greater than 0.5 g/dL?
b) How large a sample is needed to estimate µ with margin of error 0.5 g/dL with 99% confidence?
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 200 antennas, find the probability that:
In an online survey of 4,001 respondents, 8% were classified as productivity enhancers who are comfortable with technology and use the Internet for its practical value (data extracted from M. Himowitz, "How to Tell What Kind of Tech User You Are,"..
the registrar of a large university knows that 30 of the students come to college with credit for an advance placement
1. Use the following Minitab output to determine the best-fitting regression equation for these data 2. What percentage of the total variation in the number of rush returns(y) is explained by this equation?
What are the advantages and disadvantages of the standardized p-chart as compared to the regular proportion-nonconforming chart?
Transportation problem using the stepping stone method
A bank employs two appraisers. When approving borrowers for mortgages, it is imperative that the appraisers value the same types of properties consistently.
A random sample of 36 drinks from a soft drink machine has an average content 7.6 ounces with an standard deviation of 0.48 ounces. Test the hypothesis ounces against the alternative hypothesis at the 0.05 level of significance.
I conduct an experiment doing fixed-level testing with ε = .05; I know that for a given set of alternatives my power will be .85. True or False ?
Based on this information, by what factor does the risk of having an accident increase due to driving while intoxicated?
Calculate the appropriate measure to estimate the percent defective. Find UCL and LCL. Show your work
Assuming all outcomes are equally likely, find P (H n M), P (H ? M), and P (Hc). Determine whether or not H c and M are mutually exclusive.
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