¶ … digit integers {1, 3, 5, 7, 9}.
Sampling distribution of each sample is .04
Mean () Probability P (x)
If a population has a standard deviation ? of 25 units, what is the standard error of the mean if samples of size 16 are selected? Samples of size 36? Samples of size 100?
Standard error for sample size 16 25 / 4= 6.25
Standard error for sample size 36 25/6= 4.17
Standard error for sample size 100 25/10= 2.5
According to Nielsen's Television Audience report, in 2009 the average American home had 2.86 television sets (more than the average number of people per household, at 2.5 people). If the standard deviation for the number of televisions in a U.S. household is 1.2 and a random sample of 80 U.S. households is selected, the mean of this sample belongs to a sampling distribution.
a.What is the shape of this sampling distribution? Normal
b.What is the mean of this sampling distribution?
What is the standard deviation of this sampling distribution? .134
7.18
Consider a normal population with ? = 43 and ? = 5.2. Calculate the z-score for an x of 46.5 from a sample of size 16.
z= 46.5-43 / (5.2 / 4) = 3.5/1.3= 2.69
7.20
What is the probability that the sample of kindergarten children (pages 146-147) has a mean...
Statistical education trains students in the science of collecting, displaying, analyzing and interpreting numerical data. It is often referred to as "the science of doing science." Students come across statistical ideas in their daily lives. For example, a student may see statistics used in political polls, music charts and unemployment rates. Basic statistical education is important in helping students to make sense of the abundance of numerical information that is presented
This analysis was deemed necessary as differences can exist on the basis of an overall group effect and not an individual variable (question) effect and visa versa. Male Mean Per Question Analysis x Department Source of Sum of d.f. Mean Variation Squares between error Required F. value: 4.21 ? < 0.05 Concluding Statement: With a received F. value of 1.04 and a required value of F = 4.21 the conclusion can be drawn that no statistically
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