**What is associated with extrasensory perception quizlet?** extrasensory perception. The controversial claim that perception can occur apart from sensory input. Said to include **telepathy, clairvoyance, and precognition**.

**Which of the following is a drawback of longitudinal studies quizlet?** Another huge drawback to any longitudinal study is the **great amount of time it needs to collect all the data that is needed**. Usually, it takes a long period of time to gather results before you can start making patterns.

**Which of the following is the ability to think clearly rationally and independently?** **Critical thinking** is the ability to think clearly and rationally about what to do or what to believe. It includes the ability to engage in reflective and independent thinking. Someone with critical thinking skills is able to do the following: Understand the logical connections between ideas.

**Is irrelevant to the hypothesis being tested but can alter a researchers conclusions?** **Variables that are irrelevant to the hypothesis being tested that can alter a researcher’s conclusions**. A group that experiences all experimental procedures with the exception of exposure to the independent variable. A measure of the direction and strength of the relationship between two variables.

## What is associated with extrasensory perception quizlet? – Additional Questions

### What are the two main reasons to conduct a factorial study?

What are two reasons to conduct a factorial study? –**They test whether an IV effects different kinds of people, or people in different situations in the same way**. -Does the effect of the original independent variable depend on the level of another independent variable?

### What are the 4 types of experimental design?

Four major design types with relevance to user research are **experimental, quasi-experimental, correlational and single subject**. These research designs proceed from a level of high validity and generalizability to ones with lower validity and generalizability. First, a note on validity.

### What is the name for the measured variable in an experiment?

**Dependent variables** (DV): These are the factor that you observe or measure. As you vary your independent variable you watch what happens to your dependent variable.

### What does it mean if a researcher said she rejected the null hypothesis at the .05 level?

What does it mean if a researcher said she rejected the null hypothesis at the . 05 level? **There was less than a 5% chance that she would have gotten such an extreme result by chance if the null hypothesis were true**.

### Which statement is a hypothesis quizlet?

Terms in this set (5)

Is **a statement about the relationship between two or more variables**. A hypothesis is a specific, testable prediction about what you expect to happen in your study. Predicts that there will be a difference but does not specify how the groups will differ.

### What does the comparison distribution in a hypothesis test represent?

Terms in this set (4)

Define Comparison Distribution. Distribution used in hypothesis testing. It represents **the population situation if the null hypothesis is true**. it is the distribution to which you compare the score based on your sample’s results.

### How do you find the standard deviation of a comparison distribution?

**Standard Deviation**

- First, take the square of the difference between each data point and the sample mean, finding the sum of those values.
- Next, divide that sum by the sample size minus one, which is the variance.
- Finally, take the square root of the variance to get the SD.

### How do you find the level of significance in a hypothesis test?

The level of significance is the probability that we reject the null hypothesis (in favor of the alternative) when it is actually true and is also called the Type I error rate. **α = Level of significance = P(Type I error) = P(Reject H**_{0} | H_{0} is true). Because α is a probability, it ranges between 0 and 1.

### What are the characteristics of the comparison distribution?

The characteristics of the comparison distribution is **what values of mean and standard deviation we will use in our test statistic**. We do not know the standard deviation of the true difference between the samples right? So we have to calculate that as well as the mean for the difference.

### What is the mean of a comparison distribution?

“A comparison distribution type is **what we use to make inferences from the data of our study or experiment**. The researcher uses the comparison distribution to determine how well the distribution can be approximated by the normal distribution. Hypothesis testing is very important for every statistical test. ” awais.

### How do you find the mean of a comparison distribution?

Calculate the mean of each sample by **taking the sum of the sample values and dividing by the number of values in the sample**. For example, the mean of the sample 9, 4 and 5 is (9 + 4 + 5) / 3 = 6. Repeat this process for each of the samples taken. The resulting values are your sample of means.

### What is difference between z test and t-test?

**Z-tests are statistical calculations that can be used to compare population means to a sample’s.** **T-tests are calculations used to test a hypothesis**, but they are most useful when we need to determine if there is a statistically significant difference between two independent sample groups.

### What is z-test used for?

A z-test is used in **hypothesis testing to evaluate whether a finding or association is statistically significant or not**. In particular, it tests whether two means are the same (the null hypothesis). A z-test can only be used if the population standard deviation is known and the sample size is 30 data points or larger.

### What are the 3 types of t tests?

Types of t-tests

There are three t-tests to compare means: **a one-sample t-test, a two-sample t-test and a paired t-test**. The table below summarizes the characteristics of each and provides guidance on how to choose the correct test.

### For what are the t-test and F test used for?

The t-test is used **to compare the means of two populations**. In contrast, f-test is used to compare two population variances.

### What is the main difference between a t-test and an F-test in ANOVA?

**The T-test is used to check the hypothesis for the sample mean whereas the f-test is used to run the hypothesis on the variance of the samples**.