tag:blogger.com,1999:blog-464276035979449595.post3822874758070997692..comments2017-06-05T03:12:14.798-07:00Comments on Statistics Without Tears: The Standard Normal Model: Standardizing ScoresJudy Cramernoreply@blogger.comBlogger4125tag:blogger.com,1999:blog-464276035979449595.post-88057144015065664152016-04-16T13:56:19.034-07:002016-04-16T13:56:19.034-07:005% greater is equivalent to 95% less, and the z-sc...5% greater is equivalent to 95% less, and the z-score for .95 is 1.645. Plugging 155 (your number), 132 (the mean) and 1.645 (the z-score) into the z-score formula gives us a standard deviation of about 14.Judy Cramerhttps://www.blogger.com/profile/18289307240288508308noreply@blogger.comtag:blogger.com,1999:blog-464276035979449595.post-63808113459144439772016-04-16T13:50:49.697-07:002016-04-16T13:50:49.697-07:0090% above is equivalent to 10% below. The associat...90% above is equivalent to 10% below. The associated z-score for .10 is approximately -1.28. Plugging 6 (your value), 12 (the standard deviation), and -1.28 (the z-score) into the z-score formula gives us a s<br />mean of about 21.4.Judy Cramerhttps://www.blogger.com/profile/18289307240288508308noreply@blogger.comtag:blogger.com,1999:blog-464276035979449595.post-34784795308924774322016-04-15T17:36:13.388-07:002016-04-15T17:36:13.388-07:00The standard deviation of a normal distribution is...The standard deviation of a normal distribution is 12 and 90% of the values are greater than 6. What is the value of the mean?<br />pippenhttps://www.blogger.com/profile/00685730455730172596noreply@blogger.comtag:blogger.com,1999:blog-464276035979449595.post-61865951953519220452016-04-15T17:35:51.077-07:002016-04-15T17:35:51.077-07:00The mean of a normal distribution is 132, and only...The mean of a normal distribution is 132, and only 5% of the values are greater than 155. What is the standard deviation?<br />pippenhttps://www.blogger.com/profile/00685730455730172596noreply@blogger.com