In which type of graph do the bars touch to indicate the overlapping nature of the data?
a) bar graph
b) histogram
c) pie chart
d)
... [Show More] scatterplot
histogram
Which scale of measurement is dichotomous/categorical and does not have a sp order, equal intervals or an absolute zero?
a) nominal
b) ordinal
c) interval
d) ratio
nominal
Which scale of measurement would be used to measure the places achieved in a horse race?
a) nominal
b) ordinal
c) interval
d) ratio
ordinal
Which scale of measurement would be used to measure temperature?
a) nominal
b) ordinal
c) interval
d) ratio
interval-no absolute zero
Which scale of measurement would be used to measure reaction time in seconds?
a) nominal
b) ordinal
c) interval
d) ratio
ratio
Which type of distribution is peaked?
a) platykurtic
b) kurtosis
c) leptokurtic
leptokurtic
In a positively skewed distribution, which has the largest value?
a) mean
b) median
c) mode
mean
In a negatively skewed distribution, which has the largest value?
a) mean
b) median
c) mode
mode
What should you use as a measure of central tendency when there are outliers?
a) mean
b) median
c) mode
median
What should you use as a measure of central tendency when there are no outliers?
a) mean
b) median
c) mode
mean-it is more precise
Which of these is not a prediction of the central limit theorem?
a) as sample size increases, the sampling distribution of the mean approaches normal distribution
b) mean of the sample should equal the population mean
c) the median of the sample should equal the population median
d) SD of the sampling distribution should qual the population SD divided by the sq root of the sample size
c) the median of the sample should equal the population median
What is the level of significance?
a) alpha
b) beta
c) 1-alpha
d) 1-beta
alpha
What refers to the tendency to incorrectly reject the null hypothesis?
a) Type I error
b) Type II error
Type I error
What error is made when the researcher accepts the null hypothesis but it is actually false?
a) Type I error
b) Type II error
Type II error
The probability of making a Type I error is:
a) alpha
b) beta
c) 1-alpha
d) 1-beta
alpha
The probability of making a Type II error is:
a) alpha
b) beta
c) 1-alpha
d) 1-beta
beta
Increased power refers to the:
a) ability to correctly reject the false null hypothesis
b) ability to correctly accept the false null hypothesis
a) ability to correctly reject the false null hypothesis
All of these increase statistical power except:
a) reducing alpha (.01 instead of .05)
b) large sample size
c) one-tailed test
d) controlling for extraneous variables
a) reducing alpha (.01 instead of .05)--power is increased by increasing alpha (but this also increases the probability of making a Type I error); decreasing alpha gives you more confidence but less power
Which of the post hoc analyses are vulnerable to a Type I error?
a) Scheefe
b) Tukey
c) Fishers
Fishers; the others are vulnerable to a Type II error
Which statistical test is suitable for using on nominal data?
a) chi-square
b) Mann-Whitney U
c) t-test
d) multiple regression
a) chi-square
Which statistical test is suitable for comparing the means of 2 groups?
a) ANOVA
b) ANCOVA
c) t-test
d) multiple regression
t-test
Which statistical test is suitable for comparing 2/more group means for 2/more IVs?
a) one-way ANOVA
b) factorial ANOVA
c) t-test
d) multiple regression
factorial ANOVA
A tire manufacturer wants to find out if drivers in LA drive more miles per year than divers in the rest of the US. He obtains the national mileage avg and determines the miles driven by 100 drivers randomly chosen from the LA phonebook. What stats test should he use to analyse the data?
a) t-test
b) ANOVA
c) MANOVA
d) ANCOVA
t-test
A larger F score on an ANOVA demonstrates a:
a) less significant effect
b) more significant effect
more significant effect
Which statis test would be used to investigate the correlation btwn a continuous variable and a true dichotomy variable?
a) pearson r
b) spearman rho
c) biseral
d) point biseral
point biseral
Which statis test would be used to investigate the correlation btwn a continuous variable and an artificial dichotomy variable?
a) pearson r
b) spearman rho
c) biseral
d) point biseral
biseral
Which statis test would be used to investigate the correlation btwn a continuous variable and another continuous variable when the relationship is linear?
a) pearson r
b) spearman rho
c) biseral
d) point biseral
pearson r
Which statis test would be used to investigate the correlation btwn a continuous variable and another continuous variable when the relationship is nonlinear?
a) pearson r
b) eta
c) biseral
d) point biseral
eta
Which statistical test is used to predict an individual's score on Y given her obtained score on X?
a) pearson r
b) eta
c) regression analysis
d) tetrachoric
regression analysis
Which type of regression analysis is used when there are 2+predictors and 1 continuous criterion?
a) multiple regression
b) canonical correlation
c) discriminant function analysis
multiple regression
Which type of regression analysis is used when there are 2+predictors and 1 nominal criterion?
a) multiple regression
b) canonical correlation
c) discriminant function analysis
discriminant function analysis
Which type of regression analysis is used when there are 2+predictors and 2+ continuous criterion?
a) multiple regression
b) canonical correlation
c) discriminant function analysis
canonical correlation
Which type of structural equation modeling involves static groups and one-way causal flows-ie. recursive relationships?
a) path analysis
b) LISERL
c) canonical correlation
a) path analysis
Which type of structural equation modeling involves non-static groups and one-way or two-way causal flows-ie. non-recursive relationships?
a) path analysis
b) LISERL
c) canonical correlation
LISREL
In what type of research can the researcher randomly assign participants to different levels of the IV
a) true exptl research
b) quasi-exptl research
c) clinical study
true-exptl research
In what type of research can the researcher not randomly assign participants to different levels of the IV?
a) true exptl research
b) quasi-exptl research
c) clinical study
quasi-exptl research [Show Less]