Steps in Statistical Inquiry

According to Fraenkel and Wallen, what is the minimum sample size for descriptive studies?

• 30

• 50

• 100

• 150

It represents the value of z at 90% confidence level.

• 1.58

• 1.65

• 1.96

• 2.58

How many samples are needed if C.I. = 95% and e=2.30%

• 150

• 300

• 1200

• 2400

It is the sampling method that gives every member of the population a fair chance to be selected in the study.

• Convenient Sampling

• Judgement Sampling

• Probability Sampling

• Non Probability Sampling

The following are examples of probability sampling except

• Convenient sampling

• Simple random sampling

• Stratified random sampling

• Cluster random sampling

What type of sampling method illustrated in the figure?

• simple random sampling

• Stratified random sampling

• Systematic random sampling

• Cluster random sampling

The parametric test used in 3 or more group design.

• Independent sample t test

• Dependent sample t test

• ANOVA

• Pearson's r

It is the operational statement of the theory that the experimenter believes to be true and wishes to prove.

• Null hypothesis

• Alternative Hypothesis

• Hypothesis

• Critical Value

When to reject the null using probability value with level of significance at 0.05?

when to reject the null hypothesis using test statistic and critical value.