# Study sets matching "normal curve"

Study sets

Diagrams

Classes

Users

34%

13.5%

2.35%

68%

What percentage of observations are there between the mean and…

Percentage of observations between +1 σ and +2 σ on a Normal c…

Percentage of observations between +2 σ and +3 σ on a Normal c…

What percentage of observations are there between - 1 σ and +…

34%

What percentage of observations are there between the mean and…

13.5%

Percentage of observations between +1 σ and +2 σ on a Normal c…

Center

Variation

Distribution

Outlines

A representative or average value that indicates where the mid…

a measure of the amount that the values vary among themselves

The nature or shape of distribution

Sample values that lie very far away from the vast majority of…

Center

A representative or average value that indicates where the mid…

Variation

a measure of the amount that the values vary among themselves

marginal probability

conditional probability

joint probability

normal distribution

number of times an event occurred divided by the number of tim…

probability the event "A" will occur given that event "B" occu…

probability that event "A" and "B" will occur together

symmetrical; mean, mode, median all in same place

marginal probability

number of times an event occurred divided by the number of tim…

conditional probability

probability the event "A" will occur given that event "B" occu…

What are the characteristics of a norma…

What is the proportion of area under th…

What is a Z-score?

How do you calculate a Z-score?

1. Curve is belle-shaped & symmetrical... 2. Mean, mdn, mode are…

Know how to calculate.

turn raw scores into standardized scores. We describe a single…

Sample data: Xi - Mean divided by SDsample... Population: Xi - M…

What are the characteristics of a norma…

1. Curve is belle-shaped & symmetrical... 2. Mean, mdn, mode are…

What is the proportion of area under th…

Know how to calculate.

The Normal Curve

Mean

Standard deviation (SD)

Non-normal Distributions and Curves

A statistical and theoretical model that is used to visualize…

average of data points... right at the middle of the normal curve

variability of data--> how spread out is the data?... 1 SD = 68%…

Skewed: Atypical distributions that occur when a distribution…

The Normal Curve

A statistical and theoretical model that is used to visualize…

Mean

average of data points... right at the middle of the normal curve

Statistical inference

Normal distr.

Central limit theorem

Z-score

using descriptive summaries as basis for making estimates of u…

(normal curve) good approximation of distribution of scores fo…

regardless of original shape of distr., the sampling distr. of…

# of standard deviations from mean... (standardized score that ad…

Statistical inference

using descriptive summaries as basis for making estimates of u…

Normal distr.

(normal curve) good approximation of distribution of scores fo…

normal curve

first criteria

second criteria

third criteria

a symmetric, bell-shaped distribution with a single peak; peak…

criteria for normal distribution; most data values must be clu…

criteria for normal distribution; data values are spread evenl…

criteria for normal distribution; larger deviations from the m…

normal curve

a symmetric, bell-shaped distribution with a single peak; peak…

first criteria

criteria for normal distribution; most data values must be clu…

Statistical inference

Normal distr.

Central limit theorem

Z-score

using descriptive summaries as basis for making estimates of u…

(normal curve) good approximation of distribution of scores fo…

regardless of original shape of distr., the sampling distr. of…

# of standard deviations from mean... (standardized score that ad…

Statistical inference

using descriptive summaries as basis for making estimates of u…

Normal distr.

(normal curve) good approximation of distribution of scores fo…

characteristics of a normal curve (6)

other names for the normal curve

empirical rule (1+6)

empirical numbers

symmetrical and bell shaped... would balance if held up at mean…

bell curve... shape looks like a bell outline... density function... t…

if a distribution is normal, the following empirical rules app…

0.15, 2.35, 13.5, 34, 34, 13.5, 2.35, 0.15

characteristics of a normal curve (6)

symmetrical and bell shaped... would balance if held up at mean…

other names for the normal curve

bell curve... shape looks like a bell outline... density function... t…

normal curve- primary

normal curve- secondary

abnormal curve- kyphosis

abnormal curve- lordosis

thoracic- upper back... sacral- pelvic area

cervical- neck area... lumbar- lower back

thoracic

lumbar sticks in

normal curve- primary

thoracic- upper back... sacral- pelvic area

normal curve- secondary

cervical- neck area... lumbar- lower back

Standard Scores

Scaled Scores

Percentile Ranks

Qualitative Ranges

raw scores that have been transformed to have a designated mea…

a feature of scores on a norm referenced relative to the stand…

individuals position relative to the standardization sample... p…

131+ Upper Extreme/Normative Strength... 116-130 Above Average/No…

Standard Scores

raw scores that have been transformed to have a designated mea…

Scaled Scores

a feature of scores on a norm referenced relative to the stand…

0.68

0.997

the area beneath the curve = 1.

takes either x's or z-scores and conver…

Find the area beneath the Normal Curve between z = -1 and z =…

Find the area beneath the Normal Curve between z = -3 and z =…

The Normal Curve is an example of a DENSITY CURVE. Density cur…

normalcdf(

0.68

Find the area beneath the Normal Curve between z = -1 and z =…

0.997

Find the area beneath the Normal Curve between z = -3 and z =…