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1. What information is provided by the sign (+ or -) of the Pearson correlation?
2. What information is provided by the numerical value of the Pearson correlation?
Make a histogram of the daily sales since the shop has been in business.- State one fact that is obvious from the scatterplot, but not from the histogram.
a manufacturer of mp3 players surveyed 100 retail stores in each of the firms sales regions. an analyst noticed that in
When a pacemaker factory is operating normally (the null hypothesis H0), a randomly selected pacemaker fails a test with probability q0 = 10-4. Each day, an inspector randomly tests pacemakers.
The following table contains the probability distribution for the number of daily postal mails distributed in a small town
The following are midterm and ?nal examination test scores for 10 students from a calculus class, wherex denotes the midterm score and y denotes the ?nal score for each student.
It's your first day at the Jedi Temple, working as a lightsaber manufacturer. Your first task on the job is to analyze the control and capability of this process. Your main concern is to see if the lightsabers fit within the required length specif..
The following data arose from a randomized block design, where factor B is the blocking variable and corresponds to plots of land on which cotton is planted.
Let X1, ..., Xn be i.i.d. having the uniform distribution on the interval (?1-?2, ?1+?2), where ?1 ? R, ?2 > 0, and n > 2. Find the UMVUE's of ?j, j = 1, 2,
The video "What is History For?" argues that history matters because it provides solutions to the problems of the present.
q1 suppose two fair six-sided dice are tossed and the random variable x is used to represent the sum of the numbers
A recent poll of 700 people who work indoors found that 278 smoke. If the researchers want to be 98% confident of their results to within 3.5 percentage points, how large a sample is necessary?
Explain in language that the manager can understand why we cannot be confident that sales rose by 6%, and that in fact sales may even have dropped.
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