what z score did she obtain course hero

How good is your z-score?

Most Recent Z-Scores Documents Uploaded All Recent Z-Scores Study Resources Documents. 1 Page. region of rejection.docx. Register Now. region of rejection.docx. School: Ashford University. Course: Sophia Mat 300. 2 Pages. Final Exam Review - Part Three Notes.docx.

What is z score in statistics?

Nov 24, 2020 · Graph 1 is the correct one. Explanation: if Ashley is pleased, it is probably because she knows that she scored similarly to the majority of students. The mean is a 78 in both graphs. But the first graph has more diversity among scores. And at least 20% of the other students in the course did worse than Ashley.

How do you calculate the z-score?

Mar 29, 2021 · On the SAT, 0.75 vs 0.6 4) Convert the following test scores to z-scores and then decide which is the student’s best and worst area of performance. a) Best: English b)Worst: science Test Score Mean Standard Deviation Z-Score English 87 80 5 1.4 Science 90 92 16-0.13 History 75 55 18 1.1 5) Mike made a 75 on his Psychology test. His teacher ...

What does a positive z-score mean?

Sep 03, 2019 · Sara notes that she has discussed the presidential election candidates with 40 friends, and 27 said that they are voting for candidate Jones. Sara is therefore convinced that candidate Jones will win the election because Jones gets more than 50% of votes. 2. What z-score did she obtain?

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Z-score and Probability Converter

Please provide any one value to convert between z-score and probability. This is the equivalent of referencing a z-table.

Probability between Two Z-scores

Use this calculator to find the probability (area P in the diagram) between two z-scores.

What is z-score?

The z-score, also referred to as standard score, z-value, and normal score, among other things, is a dimensionless quantity that is used to indicate the signed, fractional, number of standard deviations by which an event is above the mean value being measured.

Example 1

The grades on a history midterm at Almond have a mean of and a standard deviation of .

Example 2

The grades on a geometry midterm at Almond have a mean of and a standard deviation of .

Practice problems

The grades on a geometry midterm at Oak have a mean of and a standard deviation of .

How to calculate area of a curve?

There are three types of area calculations that you will be performing, each requiring slightly different work: 1 For areas to the left of z: simply use the area provided by a table or technology. 2 For areas to the right of z: because the total area under a density curve is 1 (100%), simply calculate: 1 − area to the left of z0. 3 For areas between two z-values, say z0 and z1 (where z0 < z1): find the area to the left of z1 and subtract from it the area to the left of z0.

What are the parts of a standard normal table?

It’s important to realize that a Standard Normal Table has two parts: (1) the top and side margins, which form the tenths and hundredths of a z -score, and (2) the body of the table, which are all the area (probability) values. Also, remember that the Standard Normal Table only provides us information on the area (probability) to the left of a z-score. A small excerpt of Table B from Appendix A is shown below.