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one hundred students take a multiple choice test we wish to test the hypothesis that the students guessed at random on
you may have heard the old adage stay with your first answer on a multiple-choice test is changing answers more likely
when polled about a proposition on a ballot the responses of men and women were as followsa state in words the null
the mechanical aptitude scores of different classifications of workers are as followsa test the null hypothesis that
fifty rats are randomly divided into group a and group b the rats in group a are given a series of training trials that
in a large class 13 students required a makeup examination the instructor gave the same test to everyone but because of
in two equivalent problem situations 12 children are praised on one occasion and blamed on another their reactions
1 suppose that you are the president of always run company problem 11you really do not care about all the comparisons
suppose an educational psychologist is carrying out an experiment in which grade school children hear one of four
1 a good way to begin the computation of a two-way anova is to find for each cell the number of raw scores the sum of
a psychologist wishes to estimate mean reaction time such that he can be 95 confident that x is not farther than 3
with reference to problem 25 our psychologist now wishes to change the nature of the reaction task and to compare mean
in the introduction to the chapter we used the example of seven experimental drugs being tested for use with alzheimers
1 in the analysis of variance f test why is it that only the area in the upper tail of the f distribution is of
a psychologist wishes to compare mean reaction time on a frequently used reaction task with that on a new task he
a psychologist wonders whether midsemester warning notices affect performance she decides to select a sample of
professor smith wishes to compare the performance of students in her class on multiple-choice and fill-in-the-blank
self-fulfilling prophecies refer to beliefs or expectations that can bring about enhanced or impaired performance
in our example problem in suppose we had used x for the text messaging condition and y for the no distractions
is reaction time to a red light different from that to a green light suppose 20 subjects have been selected at random
dr fredericks believes that environment is more important than genetics in influencing intelligence he locates 12 pairs
a researcher is investigating the effects of a new drug on the ability of rats to learn to navigate a maze she is
for the data in problem 5 use ibm spss to calculatea the t statistic andb the correlation between x and yc what is the
what sample value of r would we need for statistical significance ifa n 5 and a 05 for a two-tailed testb n 10 and a