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25 groups with 7 people in each group, join "The Greatest Loser" competition. Based on the greatest percent of weight loss, the greatest loser wins. Calculations regarding percentages are made by taking the total weight of the group and dividing by 7. Weignts are measured initially and after 9 weeks.
A new group comes along and that only has 5 people. Their weights are also measured initially and after 9 weeks. What would be the most accurate methodology for determining the percentage of weight loss for this new group?
By using 0.05 level of significance, is there any evidence of difference in mean life of bulbs produced by two kinds of machines?Calculate p-value and interpret its meaning.
Assume the population standard deviations are not the same. At the .05 significance level, is there a difference in the mean waiting time?
What is the mean and standard deviation of the sampling distribution of x-bar assuming that mean =20 and standard deviation equals the square root of 20?
Construct a 99% confidence interval for the proportion of Americans who live in neighborhoods with acceptable levels of carbon monoxide.
What is the correct answer to Suppose you were trying to decide which of two machines to purchase. Furthermore, suppose the length to which the machines cut a particular product part was important.
Find the probability that follows Binomial distribution.
What is the appropriate procedure to test a significant difference in means between the two groups? Use the critical-value method.
Using a present value table, your calculator, or a computer program present value function, answer the following questions. Assistance is needed with the formula to calculate the problems:
A sample of 49 pieces of cloth reveals a sample mean breaking strength of 69.1 pounds. State the null and alternative hypotheses.
Test the equality of the means of three populations.
What is the probability that separates the bottom 25 percent from the rest of the distribution.
Determine what analysis would you do on each problem (ie, one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
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