What is the mode for this histogram?

Jack wants to know how many people in his class are taller than him. Jack is 67 inches. What percentage of the class is taller than jack?

Sample mean= 64.67 in

Sample Standard deviation= 3.43

If 12% is due to chance and 88% is not, are the results significant?

Dr. Palumbo wants to know if certain foods affect happiness more than others. She randomly assigns 10 people to eat tomatoes, 10 different people to eat berries, and 10 different people to eat an ice cream sundae. She measures the level of happiness by counting the number of times they smile while eating the food. Using the SPSS data file Final.sav, determine if poc hoc tests are needed. 

    After discovering a new passion for psychological research, Guy Fieri decides to find out if people who regularly dine at his restaurant report more overall life satisfaction, in comparison to the general population. Because he is known for his robust flavors and charismatic personality, Guy predicts that those who eat at his restaurant are more satisfied with their life than the general population. He knows that the average score for the general population on the Life Satisfaction Assessment is 60.21, (σ= 10). After giving the Life Satisfaction Assessment to his regular customers, Guy find that their average score is 82.47.

Which type of test would you run?

Jessica is comparing a sample to a population where the population mean is known but not the standard deviation. She has 50 participants in her sample, what are the degrees of freedom.

1.       Dr. Hipp wants to know if there is a difference between energy levels before a rock concert, in comparison to after a rock concert. To measure energy levels, Dr. Hipp distributes a questionnaire to 30 random people at a Pink Freud concert, a new and upcoming band. She asks them to rate their energy from (1= very unenergetic) to (5= very energetic). Once the concert is over, she has the same participants complete the same questionnaire.

What statistical test should Dr. Hipp run and

is this a one-tailed or two-tailed hypothesis?

Dr. Hipp wants to know if there is a difference between energy levels before a rock concert, in comparison to after a rock concert. To measure energy levels, Dr. Hipp distributes a questionnaire to 30 random people at a Pink Freud concert, a new and upcoming band. She asks them to rate their energy from (1= very unenergetic) to (5= very energetic). Once the concert is over, she has the same participants complete the same questionnaire. (Use variables “EnergyBefore” and “EnergyAfter” in SPSS dataset)

Using exam2reviewdata, which is the correct complete summary statment?

Dr. Phee thinks that students who consume a bag of fruit snacks will do better on their stats final. He has one group of 20 students eat a bag of fruit snacks then take the final. He then has another group of 20 students take the final without eating the fruit snacks. Assuming a symmetrical distribution, what statistical test would he run?

What is the difference between a one-way and two-way ANOVA?

Dr. Spencer wants to know if type of dog (golden doodle vs. poodle) and dog gender (male vs female) influences levels of happiness in their owners.

- What is the factorial design?

- what are the IVs and their levels?

A recent survey found that students living on a college campus in Connecticut consume an average of 3 cups of coffee per day. I believe that Eastern students drink significantly more often than this. I surveyed 40 Eastern students and asked them how much coffee they drink per day.  Using the SPSS data file Final.sav, determine if my hypothesis was significant.

In a 4X2 design how many interaction effect are possible?

Dr. Bright hypothesizes that both the brightness of lightbulbs in an office and the number of light bulbs in an office impact worker productivity. He has four conditions in his study:

(1)4 bright lightbulbs

(2)4 dim lightbulbs

(3)1 bright lightbulb

(4)1 dim lightbulb

Participants are randomly assigned to one of these four groups, and number of math problems successfully completed in the office in 30 minutes is measured.

Does the effect of brightness on productivity depends on number of lights?

Dr. Fay wants to see if there is a relationship between amount of studying and test scores. Would she use a correlation or regression analysis?

In the equation Y'= bx+a

What does each letter stand for?

Using the table, what percentage of employees worked 8 hours or more? (8 ≥)

If variable is nominal, use _ and report the frequencies for each category.

If variable ordinal, use median and _.

If variable is normally distributed and interval/ratio, use mean and _.

If variable is _ and interval/ratio, use median and range.