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The following data shows the packages gathered for delivery for ten days and the proportion of packages received not delivered to the customers at expected time.
Day Collected Packages Not delivered Proportion
1 136 4
2 153 6
3 127 2
4 157 7
5 144 5
6 122 5
7 154 6
8 132 3
9 160 8
10 142 7
A. Construct the proportions charts for this process.
B. Is the mail package delivery out of control?
Use the normal distribution to approximate the following probability: According to the most recent Davenport student profile, 47% of students have children under 17 living at home with them.
Problem based on decision tree - Evaluate the strategy that maximizes the manufacturer's expected net earnings.
Compute the score based on their appropriate class means and standard deviations:
Determine the largest village in terms of the population?
mean is calculated for each sample, then the average distance between M and u would be:
Carry out test of independence to find out whether employee health insurance coverage is independent of size of company. Use α = 0.05 level of significance.
What was the cost for the 10 percent of employees who incurred the highest dental expense?
To guarantee that cans of soda are properly filled, some cans are sampled and the amounts measured. The overall average for the samples is 12 ounces.
Use the normal approximation to the binomial distribution and part (b) to answer the following question: What is the probability that a seat will be available for every person who shows up holding a reservation?
To test whether there is significant mean difference between two groups using independent sample t test.
Let 3 trails (they may not be independent), each of which is either success or not. Let X denotes number of successes. Assume E[X] = 1.8. Determine the largest possible value of P(X=3)?
When carrying out a large sample test of H 0 : m =10 vs. H a : m ¹ 10 by using a p-value, we reject H 0 at level of significance α when the p-value is:
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