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An experiment ws designed to estimate the mean difference in weight gain for pigs fed ration A as compared with those fed ration B. Eight pairs of pigs were used. The pigs within each pair were littermates. The rations were assigned at random to the two animals within each pair. The gains (in pounds) after 45 days are shown below:
RationA RationB65 5837 3940 3147 4549 4765 5553 5959 51
Assuming weight gain is normal, find the 95% confidence interval estimate for the mean of the differences μd where d= ration A - ration B.
Reading highway signs is not always easy, especially if your vision is imperfect. Vision in general tends to deteriorate with age. Two researchers conducted a study to determine if the distance at which a standard highway sign could be recognized ..
Explain the relationship between total gross and opening gross total gross and number of theatres total gross and week in top 60.
Assume you choose 20 houses at random. On average, how many houses of twenty would you expect to have DVD? Determine standard deviation of number of houses with DVD?
The following table summarizes data between money spent on gambling and winnings for Robert.
Assuming the sigma of 200 was actually the standard deviation for the sample, recalculate the interval estimate. Discuss how this changed your result from that in part b.
Find a 99% confidence interval estimate of the proportion of people who say that they voted.
At the .05 significance level, can we conclude that the mean waiting time is less than 3 minutes?
Do the data indicate a significant difference? Test with ∝ = .05.
The average daily jail population in the United States is 706,242. If the distribution is normal and the standard deviation is 52,145, find the probability that on a randomly selected day the jail population is:
Compute the sample variance and sample standard deviation as a measure of volatility of monthly total return for Chevron (to 2 decimals): Sample variance and Sample standard deviation.
Suppose normality, determine a 90% confidence interval for population variance.
Develop the management-research question hierarchy that will help you to develop a specific proposal.
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