Biostats Exam 2 Review

Which of these are TRUE regarding statistical power? (Select all that apply)

Variance is a measure of variation for interval/ratio variables.

Small P-values mean the null hypothesis is unlikely to be true given our sample data

What kind of skew is this?

An interval of numbers obtained from a point estimate of a parameter is known as:

Sampling Bias is caused due to the selection of an over-representative sample.

If a statistic is significant from 1 at the 0.05 level, the 95% confidence interval will not contain 1.

The probability of a Type 1 error, is called the_______ (Hint: =α)

Which of these is NOT a way to increase the power of a statistical test?

Explain the meaning of a Type II Error in this study.

Increasing the sample size can reduce BOTH α and β

Which of these are measures of sampling error? (Select all that apply)

Which of these indicate rank order of observations?

Which of these is FALSE about the properties of sampling distribution of means?

What kind of skew is this?

Which of these are examples of a discrete variable? (Select all that apply)

______ is the probability that we would observe our sample data just by chance if the null hypothesis is true

What is the equation for degrees of freedom (df)?

By convention, α =

By convention, β =

Sampling error: difference between sample statistics and population parameters due to random selection of sample.

In a normal distribution, the mean, median, and mode are equal.

Which of these is matched correctly? (Select all that apply)

Normal distributions are denser in the center and less dense in the tails.

Which of the following are examples of a Ratio? (Select all that apply)

The Box Plot presents the following the elements EXCEPT:

How much percent of the area are within one SD of the mean in normal distributions?

Rejecting a true null hypothesis is known as what?

Population Variance and Sample Variance use the same equation.

The problem in a hypothesis test is to decide whether the ____ hypothesis should be ___ in favor of the _______

If p is less than or equal to α, we would:

A hypothesis to be tested is known as the ______

If the p-value is greater (NOT EQUAL TO) than the significance level, we fail to reject the null hypothesis

Which of these is NOT a nominal variable? (Select all that apply)

In a Normal distribution, the area under the normal curve is equal to _____

Dichotomous variables are a type of discrete variable that can take on only FOUR values

Confidence LEVEL = 1-α

The missing label (SpongeBob) represents: