askin Robbins wants to know which of the two new flavors to choose for distribut
ID: 3350295 • Letter: A
Question
askin Robbins wants to know which of the two new flavors to choose for distribution in the upcoming ice cream giveaway. Twenty participants rate Bratty Butterscotch and 20 other participants rate Tangy Toffee (higher scores indicate better taste). Bratty Butterscotch receives an average score of 7 with a variance of 0.4, and Tangy Toffee receives an average score of 9 with a variance of 0.8.
one-sample z-test (single-sample z-test)
one-sample t-test (single-sample t-test)
independent-measures t-test
repeated-measures t-test (paired-samples t-test)
0.5 points
QUESTION 2
How many minutes does the average patient at the UK emergency room wait before being seen by a physician? UK medical center states that the average waiting time in their emergency room is 45 minutes. You track 40 patients who enter the emergency room and find an average waiting time of 67.3 minutes with a variance of 34.1 minutes. What statistical test should be used to determine if UK claims are incorrect?
one-sample z-test (single-sample z-test)
one-sample t-test (single-sample t-test)
Independent-measures t-test
repeated-measures t-test (paired-samples t-test)
0.5 points
QUESTION 3
Mattel wanted to examine how popular 7 new toy prototypes would be to 9 year old boys. Mattel brought in 40 boys who were nine years old and allowed them to play with each toy prototype for 15 minutes (so each prototype was available for 15 minutes). Other traditional toys were also in the room, and the percentage of time each boy played with the prototype was collected for each boy. What statistical test should be used of analyze this data?
independent-measures t-test
repeated-measures t-test (paired-samples t-test)
independent-measures ANOVA
repeated-measures ANOVA
0.5 points
QUESTION 4
Should a clown who performs at birthday parties perform magic tricks or bicycle tricks as the main act, and is such a preference related to the child's age? Krusty the clown wanted to know, so he performed magic tricks as the main act at 30 parties, and he performed bicycle tricks as the main act at 30 other parties. He also divided the data by whether he had younger of older children. The data had normal distributions and the assumption of normality was met. How should Krusty analyze his data?
one-sample z-test (single-sample z-test)
repeated-measures t-test (i.e., dependent samples t-test)
Independent-measures ANOVA
Repeated-measures ANOVA (i.e., dependent samples ANOVA)
two-way ANOVA
0.5 points
QUESTION 5
Frederick J. Gravetter is contemplating ritual suicide for the disastrous job he did in his latest edition of Statistics for the Behavioral Sciences, but instead decides hopefully to give himself some positive feeling by finding out if stronger students like his book better than weaker students. So he sends out 4000 questionnaires asking students to state what grade they expect to get in their stats class, and to rate how much they like the book (on a scale from 1 for hated it to 8 for loved it). Because of the way he asked the students to rate the data, he was able to treat these data as interval. He found that A students rated the book as 4.7 (s=1.1), and B students rated it as 4.5 (s=1.5), C students rated the book as 4.6 (s=1.9), and that D/F students rated it as 3.4 (s=0.7), and that the distributions looked like textbook normal curves. Does one set of students like his book better than another?
one-sample z-test (single-sample z-test)
repeated-measures t-test (i.e., dependent samples t-test)
Independent-measures ANOVA
Repeated-measures ANOVA (i.e., dependent samples ANOVA)
two-way ANOVA
0.5 points
QUESTION 6
Jackie Chan wanted to know if different nationalities liked different levels of humor in his movies. So he presented a funny segment of his soon to be released movie to 40 Chinese, 40 Japanese, 40 Americans, and 40 Germans. He measured how many times each participant laughed during the movie segment. What statistical test should he use to analyze his data?
independent-measures t-test
repeated-measures t-test (paired-samples t-test)
independent-measures ANOVA
repeated-measures ANOVA
0.5 points
QUESTION 7
A researcher was interested in understanding whether gender differences exist in couples therapy satisfaction, and the researcher wanted to examine the effectiveness with both rational-emotive therapy and traditional cognitive therapy. What type of statistical test should be used?
one-sample z-test (single-sample z-test)
repeated-measures t-test (i.e., dependent samples t-test)
Independent-measures ANOVA
Repeated-measures ANOVA (i.e., dependent samples ANOVA)
two-way ANOVA
0.5 points
QUESTION 8
Stan was interested in which major league baseball fans were the loudest. So Stan went to 30 MLB games total, with 10 games at the St. Louis Cardinals' stadium, 10 games from the Cincinnati Reds' stadium, and 10 games from the Chicago Cubs' stadium. At each game Stan measured how low fans were over the course of the game. What statistical test should be used to analyze this data?
independent-measures t-test
repeated-measures t-test (paired-samples t-test)
independent-measures ANOVA
repeated-measures ANOVA
0.5 points
QUESTION 9
Bernice, a local entrepreneur, wants to know if the color of her hand-made coffee mugs were equally preferred by northern and southern customers. She focused on just 2 color types (red, blue) and divided customers based on living in the north or south of the United States. She then simply kept track of how many blue and red mugs were sold to southern and northern customers.
Chi-square for Goodness of Fit
Chi-square for Independence
Independent-measures t-test
Repeated-measures t-test (paired-samples t-test)
0.5 points
QUESTION 10
A company is interested if employee seniority is related to the level of participation seen in a recent program meant to boost morale. Records for a sample of 64 employees indicate that for high seniority employees, 10 had a high participation rate and 15 had a low participation rate. For low seniority employees, 20 employees had a high participation rate and 15 employees had a low participation rate. What test would best determine whether seniority is related to the level of program involvement?
Single-sample Z-Test
Single-sample t-test
Chi-square Goodness of Fit test.
Chi-square test for Independence
0.5 points
QUESTION 11
A company embarks on a new program to boost morale and improve employee productivity. Records for a sample of 64 employees indicate a mean moral of 5.6 with a standard deviation of 1.2 after the program was given. In comparison to a known population mean moral of 4.5 with a standard deviation of 1.0, what test would be most appropriate?
Single-sample Z-Test
Single-sample t-test
Chi-square Goodness of Fit test.
Chi-square test for Independence
0.5 points
QUESTION 12
A school teacher wanted to know if exam grades were higher if she spent 5 minutes at the beginning of class talking to students why the materials was important. She setup a pre-post design with students listing what classes were most important to their lives before she introduced this 5 minute "importance" discussion, and had students list what classes were most important a second time after 2 weeks of doing this "importance" discussion. Based on the listings taken from each student, the teacher ranked the pre-post data. What statistical test should be used?
Chi-square for Goodness of Fit
Chi-square for Independence
Mann-Whitney U
Wilcoxon T
Independent-measures t-test
Repeated-measures t-test (paired-samples t-test)
0.5 points
QUESTION 13
Kevin wanted to know if hot green tea helped people fall sleep better on both warm and cold nights. He asked 40 participants to drink hot green tea on a warm night (thermostat set to 73 degrees) and on a cold night (thermostat set to 55 degrees). For both mornings, participants rated how restful they felt on a 0 to 10 scale, with 0 being totally non-restful, and 10 being totally restful. The assumptions of homogeneity of variance and normality were met. What statistical test to use?
Chi-square for Goodness of Fit
Chi-square for Independence
Mann-Whitney U
Wilcoxon T
Independent-measures t-test
Repeated-measures t-test (paired-samples t-test)
0.5 points
QUESTION 14
Jake is a district manager at Walmart, and he has had a lot of trouble keeping employees. He cannot increase pay, cannot increase break-times nor benefits, but Jake is known for being extremely happy. Jake is currently focused on two different “troubled” stores, and has decided to try out using verbal reinforcement to see if it can have a substantial impact on employee satisfaction. For one store, Jake tells his managers to say at least 3 positive things to every employee every shift, and asks employees to say at least 3 positive things to employees they work with. At the other store, Jake does not ask any manager nor employee to change how they talk to each other. After 2 weeks, Jake gives every employee a short anonymous questionnaire on employee satisfaction. He then ranks the employees from highest to lowest satisfaction. What statistical test should be used to analyze this data?
Chi-square for Goodness of Fit
Chi-square for Independence
Mann-Whitney U
Wilcoxon T
Independent-measures t-test
Repeated-measures t-test (paired-samples t-test)
0.5 points
QUESTION 15
Sandy wanted to know if small dogs, medium dogs, or large dogs were more comforting in a nursing home situation. She went to nursing homes in the community for 60 days and brought with her a small, medium, or large dog (20 days for each dog type). Sandy also made sure that every patient saw each type of dog over the course of the study. She always brought a laborador retriever to insure that the breed of dog did not affect the results. She asked nursing home patients who interacted with the dog to rate how comforting each dog was. This was interval data, and the assumptions were met to allow for a parametric test. What statistical test is most appropriate?
One-sample z-test (Single-sample z-test)
One-sample t-test (Single-sample t-test)
Independent-measures t-test
Repeated-measures t-test (Paired-samples t-test)
Independent-measures ANOVA
Repeated-measures ANOVA (Matched-samples ANOVA)
Two-way ANOVA
multiple regression
Chi-square Goodness of Fit
Chi-square test for independence
Mann-whitney U test
Wilcoxon signed-ranks test (Wilxoxon T)
0.5 points
QUESTION 16
Charlie is doing an internship at the Louisville zoo, and found out that the animal caregivers thought that older penguins like tuna fish best while younger penguins liked redding fish the best. Charlie decided to conduct a study to objectively find out. He knew that sea lions would pick the food they liked best first, so he setup two feeding areas 5 meters apart. One station had tuna and the other had redding fish. Charlie counterbalanced which station had which type of food, and each animal had 10 trials. The dependent variable was what percentage a penguin chose the tuna fish first. The independent variable was Age (n = 16 for younger than five years of age, n = 21 for five years of age or older). Charlie found the data does NOT meet the assumptions of normality and homogeneity of variance. What statistical test is most appropriate?
One-sample z-test (Single-sample z-test)
One-sample t-test (Single-sample t-test)
Independent-measures t-test
Repeated-measures t-test (Paired-samples t-test)
Independent-measures ANOVA
Repeated-measures ANOVA (Matched-samples ANOVA)
Two-way ANOVA
multiple regression
Chi-square Goodness of Fit
Chi-square test for independence
Mann-whitney U test
Wilcoxon signed-ranks test (Wilxoxon T)
0.5 points
QUESTION 17
Categorical and ranked data are typically analyzed using _____ tests while ratio and interval data are usually analyzed using _____ tests.
chi-square; parametric
parametric; nonparametric
nonparametric; parametric
ordinal; parametric
0.5 points
QUESTION 18
Which of the following terms reflects how much error is expected when comparing a sample mean to a population mean [G&W Chp. 7]?
Normal distribution error
Homogeneity of variance
Standard error
Central limit theorem
0.5 points
QUESTION 19
Ratio and interval data are usually analyzed using _____ tests while categorical and ranked data are typically analyzed using _____ tests.
chi-square; ordinal
parametric; nonparametric
nonparametric; parametric
ordinal; chi-square
0.5 points
QUESTION 20
If a statistical finding is significant, this means which of the following? [relects overall knowledge from PSY310 lectures]
the finding is important
the statistical test was done properly
it was unlikely that the result happened by chance
All of the above.
one-sample z-test (single-sample z-test)
one-sample t-test (single-sample t-test)
independent-measures t-test
repeated-measures t-test (paired-samples t-test)
Explanation / Answer
Question1
independent-measures t-test
The independent-measures hypothesis test allows researchers to evaluate the mean difference between two populations using the data from two separate samples. The identifying characteristic of the independent-measures or between-subjects design is the existence of two separate or independent samples.
independent-measures t-test
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.