91影视

To describe the parameter $渭$in this setting.

Let, the sample mean is $\left(\stackrel{炉}{x}\right)=114.98$.
The sample standard deviation is $\left(s\right)=14.80$.
And the Sample size is $\left(n\right)=60$.
The confidence interval is calculated as:
$\stackrel{炉}{x}-t_{伪/2}脳\frac{s}{\sqrt{n}}<渭<\stackrel{炉}{x}+t_{伪/2}脳\frac{s}{\sqrt{n}}$
The parameter $渭$displays the population mean, which displays the average IQ score of all students enrolled in school.

To explain that why the Normal condition is met in this case.

The sample size must be more than $30$ to satisfy the normalcy criteria.
The sample size in this case is $60$, which is higher than $30$.
As a result, the criteria of normality is met.

To construct a $90\%$confidence interval for the mean IQ score of students at the school.

Using a Ti-83 calculator, the following confidence interval was calculated:

As a result, the confidence interval is $(111.79,118.17)$.

To interpret your result from part (c) in context.

As the result from part (c) as:

There is a $90\%$confident that the genuine mean IQ score of the students will fall somewhere between $111.79$and $118.17$.