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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?
What is the probability of a false negative test (the probability that a person having muscular distrophy tests negative)?
Suppose that 46 percent of families living in a certain country own a car and 18 percent own an SUV. The Addition Rule might suggest, then, that 64 percent of families own either a car or an SUV. What's wrong with that reasoning.
What is the probability of the person is 20 to 24 years old.What is the probability of the person is 20 to 34 years old.
They estimated the proportion of students at the university who prefer outdoor exercise as (0.5745, 0.8217), with 95% confidence. Which of the following is an appropriate interpretation of this confidence interval?
Chi-square tests are great to show if distributions differ or if two variables interact in producing outcomes. What are some examples of variables that you might want to check using the chi-square tests? What would these results tell you?
What is the standard deviation of expected returns for Stock X? For Stock Y?
What fraction of the calls last between 4.2 and 5 minutes?
Create a 95% confidence interval for population proportion of positive drug tests.
Sketch the appropriate distribution, and locate the critical region for a = 0.05.
Using part(a), explain to investor differences between distribution of performance figures for the 2 kinds of stock funds.
An F statistic is any statistic that follows an F distribution. Which of the following are true about F statistics and f distribution? Select all that apply
36 values given here are based on summary statistics from research by cumming. Do you think that these data are normally distributed?
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