A traveler pulls on the strap of a suitcase with 20 kg. He e…
A traveler pulls on the strap of a suitcase with 20 kg. He exerts on the suitcase a force of 30 N at an angle of 30° above the horizontal. If he pulls it a distance of 2 m, how much work does he do? What is the work done by a friction? The rolling friction between the suitcase wheels and the surface is 0.08.
Read DetailsWhich type of reliability is the most appropriate in the fol…
Which type of reliability is the most appropriate in the following situation?A psychologist wants to evaluate the reliability of the scores on a self-esteem inventory. She administers the same instrument to her clients on two different testing dates and correlates the exam scores.
Read DetailsHere is a research scenario: A researcher wants to see if th…
Here is a research scenario: A researcher wants to see if there is a significant difference in the Writing test scores between male and female students. The SPSS output is shown below: Q35.png 1) What is the null hypothesis? [BLANK-1] 2) Which t test is appropriate, independent sample t test or dependent t test? [BLANK-2] 3) From SPSS output, by assuming “Equal variances”, write the t-statistics. (Use two decimals.) [BLANK-3] 4) From SPSS output, by assuming “Equal variances”, write the degrees of freedom (df). [BLANK-4] 5) Under α=.05 level, could we reject or retain the null hypothesis? [BLANK-5]
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