Name the statistical test
Two groups of track runners were involved in a dietary experiment. One group consumed
a supplement and the other did not. The experimenters predict that the track runners who
took the supplement will run faster than those who did not take the supplement. The data
below represent the participating runner’s number minutes to the destination.
Independent t
A survey finds that Americans eat 3 meals a day with a standard deviation of 0.2. A sample of 60 students at CSUSB showed a mean of 2 meals a day. What do we conclude?
1 sample z
Measurement scale: How much you like ice-cream drumsticks (glazed chocolate on vanilla, sprinkled with crushed almonds)? Super like, like, like somehow, like little, dislike, super dislike...
Ordinal
The p-value in SPSS shows a "sig." of .02. Do we reject or retain H0?
We reject H0
The r obtained is .394. Tell me what the direction and strength of the relationship is...
Positive and weak relationship.
The average sleep time for Golden Retriever dogs is 12 hours a day. A dog researcher
thinks Labrador Retriever dogs sleep a significantly different amount. He studies 10 Labs
to see how much they sleep. The average # of hours slept are as follows: 10, 12, 15, 13, 8,
7, 10, 16, 8, 9
1 sample t
Two groups of 50 stray cats were selected to be fed by two different calorie diets. One group was fed a low-calorie diet. The other group was fed a high calorie diet. Was there a significant difference between the two groups?
Independent t
IV? A researcher would like to examine the relationship between exposure to light and mood. In one section of an office building, the intensity of the lighting is increased by 50% for a two week period and in another section of the same building, the lighting is reduced by 25% for the same time period. At the end of the two week period the workers in both sections are given a mood inventory test.
Exposure to light
The p-value shows a "sig." of .029009. Does this mean we found significance or not?
We found significance.
If I reject H0, what other steps will I need to take on a 2-samples independent t test?
Confidence interval and effect size
A group of researchers randomly selected and assigned 15 students to 3 groups: high school seniors, high school juniors, high school freshmen. Each group received an hour of study time before taking a quiz. Is there a difference between the groups?
1 way anova
Suppose we wanted to know if people get more nervous before going on a first date or asking for a raise. Because stress levels vary a great deal across different people, perhaps it would be best to ask the same people to rate their nervousness before the date and before asking for a raise. Nervousness will be measured in breaths per minute.
Dependent t
Measurement scale for: Reaction in heart rate when walking on a treadmill
Interval
The sig. shown is .509. Is there significance or not?
For a dependent t test, what is the name of the other test I must perform?
Sandler's A
A professor was assigned 20 students to test the influence of retention on exam scores. She provided content, and in one hour, she quizzed the students. Two days later, she quizzed the same students again.
Dependent t
A researcher wants to test the effects of Gatorade vs. water on hikers' endurance measured in distance hiked. Additionally, the researcher was also interested in testing hot weathers vs. cold weather on the endurance as well.
2 way anova
What are the levels?
Say you are interested in how well students perform on a standardized math-achievement test after they have completed a six-week math unit in either a computer-assisted class, a videotaped class or a regular classroom
1. A computer-assisted class
2. A videotaped class
3. A regular classroom
Levene's test shows the sig. to be .221 on a 2-sample independent t test. What can we conclude?
For 1 way ANOVA, if I reject H0 and write the conclusion, what am I supposed to do after?
Tukey HSD and effect size.
We ran a study to determine if there a relationship between the amount of water people
drink and the number of pounds lost during one month.
Pearson r correlations
In a survey conducted among married students and unmarried students in a university on the gun control debate (agree, disagree). Do the responses of the two groups significantly differ?
Chi square test of independence
Measurement scale:
Miles each runner ran
Ratio
The p-value for a 1 Way ANOVA test shows an sig. of .0000. Is this test showing a significant difference or no?
Yes, the test shows a significant difference.
What did you like most about this class?
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