In an experimental design, which variable is manipulated by the experimenter?

In which design are cases classified into groups based on characteristics they already possess?

A researcher is investigating whether sugar consumption is associated with number of truancies in high school students. In this study, the PV is:

A researcher is investigating whether sugar consumption is associated with number of truancies in high school students. In this study, the cases are:

Statisticians are mostly interested in learning about the _________.

Determine what type of study is being done: correlational, experimental, or quasi-experimental. A consumer behavior researcher is curious as to whether, in terms of the monetary value of Christmas presents received, it makes a difference if a child is naughty or nice. She has parents classify their children as naughty or nice, then calculates how much the parents spent on Christmas presents for the two different groups of children. 

Using this data set: 8, 9, 5, 4 ,7, and 8, find the following: ∑X²

Using this data set: 13,18, and 11, find the following: ∑(X－14)

Use the APA rounding rules to round the following final results: 189.9953

In an experimental design, which variable is manipulated by the experimenter?

In which design are cases classified into groups based on characteristics they already possess?

A researcher is investigating whether sugar consumption is associated with number of truancies in high school students. In this study, the PV is:

A researcher is investigating whether sugar consumption is associated with number of truancies in high school students. In this study, the cases are:

Which of the following is used when we need to account for each individual value in a set of data?

Which of the following must be included in a frequency distribution? Mark ALL the answers you think are correct. 

Which of the following determines whether to use grouped or ungrouped frequency distributions?

The 2k rule helps us determine:

You figured out you will need 5 intervals. Now you calculate for interval width and you get a 7.235. What is your interval width?

Classify the following variable as categorical or quantitative, and discrete or continuous. Political preference

Classify the following variable as categorical or quantitative, and discrete or continuous. Time it takes police to respond to 9-1-1 call

Which of the following would describe a die that is rolled 300 times and gets an equal number of 2 and 4. 

Which of the following is most influenced by outliers?

If data set 1 has more variability than data set 2, it is impossible to have the exact central tendency.

Here are the weights (in pounds) of 20 teens on an experimental food diet.  174, 142, 131, 145, 175, 150, 176, 151, 110, 162, 133, 163, 135, 178, 178, 154, 166, 146, 156, 167. What is the mean of the data?

Here are the weights (in pounds) of 20 teens on an experimental food diet.  174, 142, 131, 145, 175, 150, 176, 151, 110, 162, 133, 163, 135, 178, 178, 154, 166, 146, 156, 167. What is the median of the data?

Here are the weights (in pounds) of 20 teens on an experimental food diet.  174, 142, 131, 145, 175, 150, 176, 151, 110, 162, 133, 163, 135, 178, 178, 154, 166, 146, 156, 167.  What is the mode of the data? There is more than one correct answer. Select all that apply.,,

In a normal distribution, the ___________ focuses on 50% of the cases instead of the highest and lowest scores. 

Below are the glucose levels of one patient for 21 consecutive days.  174, 142, 131, 145, 175, 150, 176, 151, 110, 162, 133, 163, 135, 178, 178, 154, 166, 146, 156, 167, 93. Using the IQR, determine if there are any outliers. If so, which are they?

Which of the following variability measures is inclusive of all cases? There may be more than one answer. Select all that apply.,,

A clinical psychologist took a sample of four people from the population of people with anxiety disorders and gave them an interval-level anxiety scale. Their score were 57, 60, 67, and 68 with a mean of 63.00. What is s²?

A clinical psychologist took a sample of four people from the population of people with anxiety disorders and gave them an interval-level anxiety scale. Their score were 57, 60, 67, and 68 with a mean of 63.00. What is s?

Standard scores are also know as: (Select all that apply),,

Standard scores allows us to compare apples to oranges.

Raw scores are a better measure than z scores when testing whether Bob is more intelligent than outgoing. 

Using the simplified version of the normal distribution, what percentage of the cases falls within 2 standard deviations to the left of the mean?

Which column should we use if we want to figure out the percentage of the cases that falls below a positive z score?

Which column should we use if we want to figure out the percentage of cases that falls above a positive z-score? 

Eric scored 107 on the IQ test. What is his exact percentile rank? M=100    s=15

Helen scored in the 85th percentile of the IQ test. What was her raw score? M=100    s=15