On a nationwide math test, the mean was 52 and the standard deviation was 4. If Roberto scored 85, what was his z-score? Use the formula Z where u is the mean, o is the standard deviation, and x is Roberto's score. %3D Round to 4 decimal places,

On a nationwide math test, the mean was 52 and the standard deviation was 4. If Roberto scored 85, what was his z-score? Use the formula Z where u is the mean, o is the standard deviation, and x is Roberto's score. %3D Round to 4 decimal places,

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.

Question

On a nationwide math test, the mean was 52 and the standard deviation was 4. If Roberto scored 85, what
was his z-score?
Use the formula Z =
where u is the mean, o is the standard deviation, and x is Roberto's score.
Round to 4 decimal places.

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On a nationwide math test, the mean was 60 and the standard deviation was 7. If Roberto scored 85, what was his z-score?