b. Find the mean of this population (see figure below) using the formula ?,-2x?p
ID: 2947099 • Letter: B
Question
b. Find the mean of this population (see figure below) using the formula ?,-2x?pi gen.wileyplus.com/edugen/shared assignment/test/qprint.uni Chapter 7, Section 73, Question E47 0.7 0.6 0.5 0.4 0.3 0.2 Relative Frequency 0.4 0.6 Has a Cell Phone? 0 (no) l (yes) Has a Cell Phone Relative frequency histogram for a popula- tion with p 0.6 Compute the mean using the formula below If a random sample of size n is selected from a population with proportion of successes p, then the sampling distribution of p has these properties The mean, ??is equal to the proportion, p, of successes in the popula- tion, or ?, The standard error is equal to the standard deviation of the population divided by the square root of the sample size: · P . As the sample size gets larger, the shape becomes more normal and . will be approximately normal if n is large enough. As a guideline, if both np and n(1 - p) are at least 10, then using the nor mal distribution as an approximation of the shape of the sampling distribution will give reasonably accurate results.Explanation / Answer
Answer to the question is as follows:
b. Mean of the population is 0*.4 + 1*.6 = 0+.6 = .60
The formulae for mean was given in the question : as Addition sumation of probability weighted
X's
Please note that unless we know n, we can't take out Standard error, and about using the normal distribution as a approximation of the shape of sampling disrtibution.
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