1What term refers to a procedure that allows us to evaluate hypotheses about population parameters based on sample stats?
Statistical Hypothesis Testing
2What assumptions are required for hypothesis tests?
Level of measurement, random sampling, normal distribution, appropriate sample size
3What hypothesis is denoted as H1, stating that a relationship/difference exists?
Research Hypothesis
4Which tail of H1 specifies direction, either left or right tailed?
One-Tailed Test
5Which tail of H1 says that a difference exists, without specifying the direction, denoted by H1 ≠ x?
Two-Tailed Test
6Which hypothesis, denoted by H0, states that no difference exists, contradicting H1 (H0: x = x)?
Null Hypothesis
7What two outcomes can be expected with H0?
Rejecting H0 or failing to reject H0
8What term refers to the probability of getting the sample result if the null hypothesis was true?
P-Value
9What term refers to the cutoff probability, set in advance, for rejecting H0 (0.05, 0.01, 0.001)?
Alpha
10If p is less than alpha, do we reject H0?
Yes, a significant difference exists
11If p is greater than alpha, do we reject H0?
No, fail to reject, not significant difference
12What type of error, known as a false positive, involves rejecting H0 even if H0 is true?
Type 1 Error
13What type of error, known as a false negative, involves failure to reject H0 even if false?
Type 2 Error
14What exists between Type 1 and 2 errors?
Trade-off
15Making assumptions, stating the hypotheses and alpha, selecting the test statistic, computing the statistic, and interpreting the decision are all part of what?
Five-Step Model
16Which test is used when the population SD is known?
Z Test
17Which test is used when the population SD is unknown?
T test
18Which test is used when comparing a sample mean to the population mean, and the population SD is known?
One-Sample Z Test
19From a One-Sample Z Test, how do you find p?
Column C from the Z Scores Table
20Which test is used when comparing the sample mean to the population mean, when the population SD is unknown, using the sample SD?
One-Sample T Test
21What’s the formula for df? (Degrees of freedom)
N-1
22When df is above 120, what’s identical?
t and Z
23Which test is used to compare two independent group means?
Two-Sample t Test
24Degrees of freedom for Two-Sample?
(N1 + N2) - 2
25Which test is used to compare two group proportions?
Two-Sample Z Test