psych- intelligence testing, and statistics

what is a cognitive ability test?

Measures the range of intelligence comparing to the same age peers

What do cognitive ability test focus on

Thinking, problem-solving, working memory, vocab

wechslers intelligence scale for children

determines whether a student is intellectually disabled or gifted

what are inferential statistics

statistics that generalize the population

what is P value?

Tell us if a effect from the variable happened

If results from P value is closer to zero, it means what

Results are less likely to be affected

what is normal distribution?

Measures of central tendency in measures of dispersion

what is the mean?

Average of all scores

what is the mode?

The most often occurring

Negatively skewed distribution

The mean is much lower than the median or mode

positively skewed distribution

The mean is much higher than the median or mode

A left skew is what distribution

Negative

A right skew is what distribution?

Positive

A normal distribution is what skew

zero

why is there regression towards the mean?

Occurs when an initial score is an outlier or extreme score

what is the measure of dispersion?

Shows the spread of scores from the mean

what is the range?

Absolute spread of scores in frequency distribution

When looking at variances, what is important?

The smaller the better

what does the variance allow us to find?

Standard deviation

what is the most accurate and reliable measure?

Standard deviation

Z score scores are what

Numbers listed on the bottom of chart

scores to the left or what

Negative

scores to the right or what

Positive

Standard deviation is always what number

15

The mean is always what number

100

when looking your graphs , what should you always apply

Standard deviation and mean

if the mean is 70 and the standard deviation is 10 what would the Z score of student’s with +1 have

80

what is a sample?

Means you scored above a 50% on test takers who were a part of sample

Percentile rank is not the same as what

Scoring x% on a test

sampling is an example of what

descriptive statistics