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Question: Assume that the population is 0.55. Compute the standard error of the sample proportion for the following sample sizes:
a. 100
b. 200
c. 500
d. 1000
Using the .05 significance level, can we conclude that there is a positive association between the two variables?
Suppose that combined verbal and math SAT scores follow a normal distribution with mean 896 and standard deviation 174. Suppose further that Peter finds out that he scored in the top 3% of SAT scores. Determine how high Peter's score must have bee..
The diameters of grapefruits in certain orchard are normally distributed with mean of 6.95 inches and a standard deviation of 0.75 inches. Show all work.
There is a statistical deception here. Explain what is deceptive about the bar graph.
what is the sample space of all possible outcomes? Are the outcomes equally likely?
A survey of the residents of a new subdivision on why they happened to select that area in which to live. You also wish to secure some information about what they like and do not like about life in the subdivision.
What are the mean value and standard deviation of the number among these 15 that are from the second section? What are the mean value and standard deviation of the number of projects not among these first 15 that are from the second section?
Suppose the population is normally distributed they make a decision to do a hypothesis test.
According to the National Restaurant Association, 20% of fine-dining restaurants have instituted policies restricting the use of cell phones. From a sample of 100 fine-dining restaurants,
A population has mean 325 and variance 144. Suppose the distribution of sample means is generated by random samples of size 36.
Using the EMV criteria (you wish to maximize expected profits in this case) determine what course of action that Optel should take. Make sure to state the best strategy in words.
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.
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