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1. What characterizes a regular definition (dictionary) and an operational definition?
2. What is the purpose of sampling?
3. In distributions of populations, please consider Chebyshev's rule and the Empirical Rule. This takes some thinking.
a) When (what kind of a situation) would you use each in business? Why are they important? How are they calculated?
4. However we need to look closer at "causal research". Now concerning causal research let us look deeper: What must we actually show (necessary and sufficient conditions) if we are to prove cause and effect?
5. An important practical consideration when sampling is the sample size. So, what determines sample size? What influences our decisions?
What is the probability of selecting a store at random and finding it has both a pharmacy and a floral shop?
Draw a tree diagram representing this experiment. Use this tree diagram to find the probabilities below.
If she performs 15 demonstrations this week, what is the probability of her being satisfactory? What is the probability of between 4 and 8 (inclusive) orders?
Determine the value of population mean? What is the best evaluate of this value?
Scores on an endurance test for cardiac patients are normally distributed with mean = 182 and standard deviation = 24.
A surgical technique is performed on seven patients. You are told there is a 70% chance of success. Find the probability that the surgery is successful for at least four patients.
What is the appropriate procedure to test a significant difference in means between the two groups? Use the critical-value method.
This activity is a revision of an activity found in Real Data: A Statistics Workbook Based on Empirical Data by Z. C Holcomb (1997). Published by Pyrczak Publishing.
Recognize the given samples are independent samples or matched pairs.
If you select a random sample of 100 sessions, what is the probability that the sample mean is between 7.8 and 8.2 minutes?
The current advertising campaign for a major automobile brand would be changed if fewer than 70 percent of the consumers like it.
A group of sheep, infested with tapeworms, are randomly divided into two groups as follows. Each sheep is assigned a number (1 through 20) and then 10 numbers
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