DH 202: Module 9 Quiz #4 (do not use, teacher created her own quiz)

standard deviation measures:

both dispersion and spread of data

what percentage of data will fall within 1 standard deviation of the mean?

a) 68%

b) 99.7%

c) 95%

d) 34.5%

68%

T/F: Alpha value sets the significance level of when the null should be rejected

true

T/F: P-value represents the likelihood that statistics will occur due to chance

trye

T/F: If p-value

true

which term shows how many standard deviations a given raw score is above or below the mean?

a) z-score

b) F-ratio

c) Variance

d) Average deviation

z-score

which of the following are numeric data counted in terms of whole numbers?

a) Discrete

b) Continuous

c) Categorical

d) Dichotomous

discrete

this scale of measurement shows the distance between 2 values as =, with no absolute value.

a) Interval

b) Nominal

c) Ordinal

d) Ratio

interval

which scale of measurement is not used in oral health research?

a) Interval

b) Nominal

c) Ordinal

d) Ratio

interval

which type of statistic will compare group, test a hypothesis and make predictions?

a) Inferential

b) Descriptive

c) Correlative

d) Observational

inferential

what happens when you square a negative integer?

a positive number is created

T/F: P-value determines the probability of the null hypothesis being true

true

what does a p-value of 0.01 mean?

1:100 will produce the same research results

which of the following demonstrates the strongest correlation coeffieicient?

a) -0.7

b) -0.1

c) 0.6

d) 0.2

-0.7

T/F: Inter-rater reliability is when test administration is consistent from a single examiner

false

what type of sampling would give a researcher the most valid and reliable research results

random

what type of graph is represented below?

1) RT-Skewed

2) LF-Skewed

3) Negative Correlation

4) Positive correlation

5) Upward

6) Downward

1,4,5

which of the following is a nonparametric test that compares two or more data sets from different sample groups

a) Chi-square of independence

b) T-test

c) Chi-Square

d) F-test

e) ANOVA

chi-square of independence

what type of research error occurs when a researcher mistakenly accepts null hypothesis

type II

nonparametric inferential tests are selected to be used when which of the following is being utilized in the study

1) Quantitative data

2) Qualitative data

3)Small Sample sizes

4) Large sample sizes

5) Standard Bell Curve

6) Skewed Bell curve

2) qualitative data

3) small sample sizes

6) skewed bell curve

Which is determined by subtracting the highest score from the lowest score?

Range

Which of the following can be determined by examining the mean and median of the distribution?

a) Gaussian distribution

b) Bell Curve

c) Normal Bell distribution

d) Skew

e) None of these

None of these

Which theorem suggests that if an infinite number of randomly selected samples is drawn from a population, the means of the samples tend to be normally distributed, and the average of the sample mean is very close to the mean?

a) Bell distribution

b) Normal Distribution

c) Central limit

d) Skew

e) None of these

Central Limit

Which is a perfect correlation?

A) +.75

B) 0

C) +.98

D) -98

E) +1

e) +1

This refers to a relationship or association between variables that can be measured mathematically.

Correlation