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In the last municipal election, a sample of 350 registered voters showed that 85 voted for the incumbants. Find out a 98% confidence interval estimate for the proportion of all voters voting for the incumbants.
Assuming that the Poisson distribution is a plausible model in describing variability of asbestos fiber counts in filters; derive a 95% confidence interval indicating the variability in the average number in asbestos fibers.
The Precision Scientific Instrument Company manufactures thermometers which are supposed to give readings of 0o C at the freezing point of water.
Compute and interpret each of the statistics in parts(a) through (f) Mean and Median.
Develop appropriate hypotheses such that rejection of H0 will support the researcher's contention.
Create the corresponding decision tree and make recommendations.
Compute the probability of seven consecutive points falling above the centerline given a stable process. Is this probability associated with type I or type II error?
Find out sample standard deviation (s) of scores Gordon Golfer made on his last four rounds (determine to the nearest one tenth, or .1).
As a test the truck company purchases a random sample of metal parts from Steel-R-Us, and then determines if these parts were delivered on-time. Which hypotheses should they test?
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
In a one-way ANOVA analysis of 3 treatments, with the total number of 9 observations, with an equal number of observations in each treatment, mean-square-error (MSE) was found to be 24.905.
Use confidence interval to determine the estimated margin of error, Then determine the sample mean.
Compute the value of t. What is your decision regarding the null hypothesis?
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