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Please help! Question and answers are on the image

SAT

1 answer:

Maslowich3 years ago

7 0

Answer:

the third one............

Explanation:

c) the third one

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The mean of the sampling distribution is ${p_{a}}-p__b}$

The mean of a sampling distribution is the population mean from which values are sampled. For a population of mean μ, the mean of the sampling distribution is $\mathbf{ \mu_x}$

∴

$\mathbf{\mu_x = \mu}$

From the parameters given:

Suppose that independent random samples of 50 species-a flowers
and 100 species-b flowers are selected

where;

$\mathbf{\hat p_a}$ = sample proportion of blue specie-a
$\mathbf{\hat p_b}$ = sample proprotion of blue specie-b

The mean of the sampling distribution of $\mathbf{\hat p_a -\hat p_b}$ is ${p_{a}}-p__b}$

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