d) When calculating the Pooled Standard Deviation for two samples, what does the values of n1 – 1; n2 – 1; and n1 + n2 – 2; tells us?
With the aid of an example, explain the difference between an independent and dependent sample
b) What is the shape of the sampling distribution of pˆ1 - pˆ2 for two large samples?
c) When is the pooled standard deviation used?
d) When calculating the Pooled Standard Deviation for two samples, what does the values of n1 – 1; n2 – 1; and n1 + n2 – 2; tells us?
e) Explain how you will go about constructing a confidence interval for μ1 - μ2, where σ1 and σ2 are known, and the sample is large.
f) There are three situations in which the H1 can be written when testing a hypothesis involving two populations. List all three ways using the symbol μ1 and μ2
g) Draw a two-tailed
Please solve sub parts d, e, f,g
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