In Problems 29 and 30, draw a normal curve and label the mean and inflection points.
μ = 50 and σ = 5
Step 1 of 5) Label the mean and inflection points μ = 50 and σ = 5. Although a normal probability plot of the xi’s and a separate normal probability plot of the yi’s generally mean that the joint distribution is normal, it is not guaranteed. For these two reasons, we will be content in verifying the linearity of the data by performing inference on the slope coefficient only. Technology Step-by-Step Testing the Least-Squares Regression Model. TI-83/84 Plus Hypothesis Test on the Slope 1. Enter the explanatory variable in L1 and the response variable in L2. 2. Press STAT, highlight TESTS, and select F:LinRegTTest.... 3. Be sure that Xlist is L1 and Ylist is L2. Make sure that Freq: is set to 1. Select the direction of the alternative hypothesis. Place the cursor on Calculate and press ENTER. Confdence Interval for the Slope 1. Enter the explanatory variable in L1 and the response variable in L2. 2. Press STAT, highlight TESTS, and select G: LinRegTInt . 3. Be sure that Xlist is L1 and Ylist is L2. Make sure the Freq: is set to 1. Select the confidence level. Highlight Calculate.