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Sample proportion and probability based on normal distribution.
A nationwide study in 2003 indicated that about 60% of college students with cell phones send and receive text messages with their phones. Suppose a simple random sample of n = 1136 college students with cell phones is obtained.1. Describe the sampling distribution of p' , the sample proportion of college students with cell phones who send or receive messages.?2. What is the probability that 665 or fewer college students in the sample send and receive text messages with their phones? Is this result unusual?
College Students' Seating Choices and Motivation to Achieve.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.
How many subsets of S contain either the number 6 or the number 15?
Statistics is science of conducting studies to: Solve a system of equations.
Elucidate the null and alternative hypothesis for the difference among the two means. In testing the difference between the means of two.
Develop the management-research question hierarchy that will help you to develop a specific proposal.
Describe the sampling distribution model of this mean.
What is the probability of flipping a coin 6 times and getting 4 or more heads?
Sketch density curves that might explain distributions with fallowing shapes: symmetric, but with two peaks( i.e., two strong clusters of observations)
Create the estimated regression equation by calculating the values of b 0 and b 1
(a) Use the steps of hypothesis testing, (b) figure the effect size for the study; and (c) explain your answers to (a) and (b) to someone who has never had a course in statistics.
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Correlation rule states that if X and Y are correlated, X has caused Y.
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