Question

(Sampling Distribution) answer part A, B, and C of the question provided with 1-3 complete sentences each

Answer 1

Part A:

For a normally distributed data, population mean = sample mean

From the question, population mean = 34.82

Hence the sample mean = 34.82

The sample standard deviation is given by;

`\sigma_x=\text{ }\frac{\sigma}{\sqrt[]{n}}`

where n = 6, and

`\sigma=5.02`
`\sigma_x=\frac{5.02}{\sqrt[]{6}}\text{ = 2.05}`

Therefore, the sample standard deviation is 2.05.

Part B

The interpretation of the standard deviation of the sampling distribution is that, since the square root of the sample size appears at the denominator, the standard deviation decreases as the sample size increases.

Part C

`\begin{gathered} Z=\text{ }(x-\mu)/(\sigma) \\ Z=\text{ }(30-34.82)/(2.05) \\ Z=\text{ -2.35} \\ \text{From the normal distribution,} \\ (-2.35-(-2))/(-2.5-(-2))=(x-2.3)/(0.6-2.3) \\ (-0.35)/(-0.5)=(x-2.3)/(-1.7) \\ \text{cross multiplying, we have} \\ x-2.3=\frac{-0.35\text{ x -1.7}}{-0.5} \\ x-2.3=-1.19 \\ x=-1.19+2.3 \\ x=1.11\text{\%} \\ x=0.0111 \end{gathered}`

Hence, the probability is 0.0111.