Community- statistical concepts

statistical hypothesis test used when comparing the stat. difference between two mean scores

Which measure is sensitive to extreme values (range)?

T/F: correlation of co-efficient shows probable cause and effect

no relationship is seen between the variables (cannot draw a line with the data)

A p-value of greater than 0.05 will ___ affect study results

Categorizing variables: one or the other

the difference between the high and low score of a data matrix

MOST frequently occurring score

__ of data points fall between 1 (-1 and 1) standard deviation of midpoint

Categorizing variables: no value just category

what affects the skew of the graph (shape)?

represents the square root of the sample variance

selecting an element according to certain subgroups

probability value used when testing hypothesis

research wants the __ SD possible

frequency distribution is plotted on an _ resulting graph is a pictorial representation of data

in negative correlation, as the value of y decreases, the value of x __

how do you calculate median?

divides the distribution of scores into two equal parts

the most common used method of dispersion in oral hygiene research and reflects the range

direct association between two variables

in positive correlation, as the value of x decreases, the value of y __

When data is plotted using a normal bell curve --> mean, median, and mode are __

what is being measured or observed

determines the strength of relationship between two variables

how do you calculate mode?

in positive correlation, as the value of x increases, the value of y ___

arranges data scores from lowest to highest

In a normal curve, the central point would be:

the correlation of co-efficient can be expressed as: (rate or slope of the line)

describes the center of the distribution graph

refers to the probability that a condition would happen by chance

most common measure of central tendency

the outcome of interests; should change in response to intervention

in correlation co-efficient the closer the number is to either +1 or -1, the _ the relationship

What are the two types of statistics?

degree that a study measures the variable it is designed to measure

allows one to generalize findings form the sample study to a larger population

frequency of occurrence of scores up to and including any give value in the data set

selecting every "nth" participant

consistent performances between examiners

zero determined by nature (height and weight)

calibration helps increase ___

inverse association; the score on one scale predicts an opposite score on the other side

each element of the population have equal chance of being selected (reduces the change of bias)

how do you calculate mean?

sample group chosen based solely on convenience

NOT affected by extreme high or lower values

grouping data points into consecutive intervals

the intervention; what is being manipulated

The peak of the graph

what are the common measures of central tendency?

used when comparing the statistical differences between three or more scores

what is the perfect negative correlation?

the extent to which the method of measurement performs consistently

ranked in order by criteria, but not equal in value (strongly agree -> strongly disagree)

What represents the mathematic of collection, organization, and interpretation of numeric data?

(thinking within) consistent performance by the same examiner

describes how wide the scores are around a central point

data is presented in ascending or descending order along with the frequency of each score

standard of acceptability is 1 out of 20 or a p-value of

process of establishing a relationship between a measuring device and units of measure

What type of statistics allows to infer what may happen with a population based on the data?

how to describe a group of numbers

ability of a test to identity the absence of a disease (no false positives)

Categorizing variables: continuous distinct separate units (weight,height)

the bigger the range or SD, the __ the curve

when scores are not uniform, the graphed data will demonstrate an asymmetrical appearance

determines how to graph data

no rank or oder (ethnic groups)

someone familiar with the pop. selects the sample not worried about the bias just need ppl

when more scores call in the lower range. "tail" goes to the right

equal ordered units around an arbitary zero (zero means something) (Fahrenheit scale)

Categorizing variables: distinct separate units-cannot be parts (number of people)

what is the arithmetic average of scores?

Biostats-science to describe data allows data to be___

when more scores fall in the higher range. "tail" goes to the left

measures how often each score occurs in the data matrix

What type of descriptives describes the date you currently have

Which is the strongest correlation co-efficient?

in negative correlation, as the value of x increases, the value of y __

ability of a test to correctly identify the presence of a disease

ANOVA stands for: