10.1 D1

What is the point estimate for the true mean? (just type the number to four decimal places)

In the formula for standard deviation of the sampling distribution for x-bar, we don't know the value of sigma (if we did, we would have known mu) so we will use Sx instead. Find the standard error. (to four decimal places 0.1234)

9. What t* is needed for this confidence interval? Use Table B and the degrees of freedom (df)=n - 1 to find it. (answer to 3 decimal places 0.123)

Calculate the margin of error using t* and the standard error from question 6. (answer to four places 0.1234)

CYU 1a. Use Table B to find the critical value t* that you would use for a 98% CI based on a random sample of 26 observations. (round to three places after decimal 0.123)

Use Table B to find the critical value t* that you would use for a 99% confidence interval from an SRS of 85 observations. (round to three decimal places 0.123)