sing the 95% confidence level and the 11th grade male writing scores in the Class Data file, you would expect the lower end of the confidence interval to be approximately what value?"

Answer

We do not have the Class Data file.

To find the lower end of the confidence interval, we need to know the mean and the standard deviation of the writing scores for 11th grade male students, as well as the sample size. Since we do not have access to the "Class Data" file, I cannot provide an exact answer. However, I can guide you on how to calculate it by following these steps:

1. Retrieve the writing scores for 11th grade male students from the Class Data file.

2. Calculate the mean (μ) and standard deviation (σ) of the writing scores.

3. Determine the sample size (n), which represents the number of 11th grade male students.

4. Look up the critical value for a 95% confidence level. Using a standard normal distribution table or a statistical calculator, the critical value corresponding to a 95% confidence level is approximately 1.96.

5. Calculate the standard error (SE) using the following formula: SE = σ / sqrt(n), where σ is the standard deviation and sqrt(n) represents the square root of the sample size.

6. Calculate the margin of error (ME) using the following formula: ME = critical value (1.96) x SE.

7. Subtract the margin of error (ME) from the sample mean (μ) to find the lower end of the confidence interval.

By following these steps, you can calculate the lower end of the confidence interval for the 11th grade male writing scores using a 95% confidence level.