A professor believes the students in a statistics class this term are more creative than most other students attending the university. A previous study found that students at the university had a...
A professor believes the students in a statistics class this term are more creative than most other students attending the university. A previous study found that students at the university had a...
An analysis of variance differs from a t test for independent means in that an analysis of variance A) can be used to compare three or more groups, while a t test for independent means cannot...
If the cutoff Z score on the comparison distribution is -1.64 and the sample Z score is 2.05 on the comparison distribution, the correct decision is to A) fail to accept the research hypothesis...
You plan to conduct a study where your nondirectional hypothesis will be assessed with a t test for independent means at the .05 significance level. Assuming that you will recruit 20 participants...
If a person's score on a questionnaire has been found to predict observed social skills, and the linear prediction rule uses a regression constant of 16 and a regression coefficient of 3, the predicted...
The standard deviation of the scores: 2, 0, 1, 8, and 4 is
The raw score that corresponds to a Z score of 2.0 obtained from a distribution with a mean of 80 and a standard deviation of 10 is
1)Rejecting the null hypothesis when the research hypothesis is false is a. effect size. b. power. c. a Type I error. d. a Type II error 2)Failing to reject the null hypothesis...
1)In a t test for dependent means, 15 participants are each tested twice. This makes a total of 15 "before" scores and 15 "after" scores. What are the degrees of freedom? a...
A sports psychologist gave a questionnaire about healthy eating habits to randomly selected professional athletes. The results are displayed below. Using the α =.05 significance level, is there a...
1)You conducted a t test for independent means, and found that the t score equaled 0. This means that a. the two population means must be equal. b. the two population variances must be equal...
The most likely way for a t test to be presented in a research article for a study with 25 participants is a. t (25) < significant b. t (25) = 3.01, p < .05 c. t (24) = 2.94, p <...
The mean of a self-worth measure in the population of adult males is 30.00. A researcher is interested in whether females report differing levels of self-worth. The researcher randomly samples 150...
A researcher is interested in increasing feelings of self-confidence in adolescents. He randomly selects 100 adolescents from the population and randomly assigns 50 individuals to a treatment program...
A researcher is interested in comparing a new self-talk method for reducing anxiety in individuals who are “clinically anxious.” Assume the mean and standard deviation of this measure of anxiety for...
The general population (Population 2) has a mean of 30 and a standard deviation of 5, and the cutoff Z score for significance in a study involving one participant is 1.96. If the raw score obtained...
A population is normally distributed with μ = 50, σ = 8, N = 52. Answer the following questions based on this information. (show all work) a. The mean of the distribution of means is ______...
1) In principal, a distribution of means can be formed by A) calculating the mean of all the possible samples of a given size and dividing it by the variance. B) using the sample's mean and...
Let f(x)= 2x-18 x-5 a) state the domain b) state the horizontal asymptote. c) state the vertical asymptote(s). ...
1)A car company charges $31 per day to rent a particular type of car and $0.16 per mile. Juan is charged $47.96 for a one day rental. How many mile did he drive? a)121mi b)106mi c)300mi d)269mi 2)...