Using the Standard Normal Table from the online lectures this week, what is the area under the standard normal curve: a) To the left of a z-score of 1.25 b) To the right of a z-score of 1.25 c) Between the z-scores -0.25 and 0.55

Question

Using the Standard Normal Table from the online lectures this week, what is the area under the standard normal curve:  a) To the left of a z-score of 1.25  b) To the right of a z-score of 1.25  c) Between the z-scores -0.25 and 0.55

sovienesY · Accepted Answer

Step 1 To the left of Z score of 1.25 from Standard Normal probability table, from Standard Normal probability table, z row 1.2 and z column 0.05 the value is 0.8944 Hence P(Z&amp;lt;1.25)=0.8944 Step 2 To the right of Z score of 1.25 from Standard Normal probability table, z row 1.2 and z column 0.05 the value is 0.8944 Hence P(Z.1.25)=1−P(Z&amp;lt;1.25)=1−0.8944=0.1056 Step 3 Between the Z-Scores -0.25 and 0.55 from Standard Normal probability table, z row 0.2 and z column 0.05 the value is 0.5987 z row 0.5 and z column 0.05 the value is 0.7088 Hence P(−0.25&amp;lt;Z&amp;lt;0.55)=P(0.55)−P(Z&amp;lt;−0.25)=0.7088−(1−0.5987)=0.3075

Using the Standard Normal Table from the online lectures this week, what is the

Answered question

Answer & Explanation

New Questions in College Statistics