{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

5_Lecture5.1_zScores_0211r_Spring11

5_Lecture5.1_zScores_0211r_Spring11 - V z-Scores PSY207B...

Info icon This preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 PSY207 B Spring 2011 Psychological Statistics V. z -Scores Objectives You should be able to .... • Describe the normal density curve • Describe the standard normal curve • And know its mean and standard deviation • Define and compute z scores z-Scores 5.1 Normal Distribution Standard Scores and Normal Distribution • We will first review the normal curve • Normal density curve • We will then discuss a special case of the normal curve • Standard normal curve • We will then discuss the scores that make up the standard normal curve • Standard scores or z scores Normal Curve Symmetrical Bell-shaped Unimodal Mean = Median = Mode N(μ, σ )
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 Normal Curve Total Proportion/Area Under the Curve = 1.00 Proportion under half of the curve = 0.50 Proportion under half of the curve = 0.50 Normal Curve • When we plot a smooth curve instead of a histogram, we are plotting a Probability Density Curve Histogram Frequency Shows the frequency of the variable plotted on the x axis Probability Density Curve Shows the probability or likelihood of the variable plotted on the x axis Probability Normal Curve • A probability density curve tells us how likely -- or probable -- something is • When the probability density function is in the shape of a normal curve , it is called a normal density curve Normal Density Curve Very probable Probability
Image of page 2
3 Normal Density Curve Not probable Probability Not probable Normal Density Curve
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern