ASSIGNMENT ID
748629
SUBJECT AREA Psychology
DOCUMENT TYPE Essay
CREATED ON 8th November 2018
COMPLETED ON 15th November 2018
PRICE
\$30
Expert hired: Noeala

# Assignment 4 Statistical Reasoning in Psychology (PS390)

Unless otherwise stated, answer in complete sentences, and be sure to use correct English, spelling, and grammar. Sources must be cited in APA format. Your response should be four (4) double‐spaced pages; refer to the “Format Requirementsʺ page for specific format requirements. StatCrunch StatCrunch tutorial videos are available at http://www.youtube.com/view_play_list?p=BE055F65E43B4973. 1. (25 points) A prison psychologist recorded the number of rule infractions for 15 prison inmates over a six-month period to be 5, 4, 2, 4, 3, 5, 2, 0, 4, 4, 5, 5, 3, 4, and 3. a. Make a frequency table. b. Make a histogram based on the frequency table. c. Describe in words the shape of the histogram. 2. (25 points) Identify and solve this problem by hand. The head of public safety notices that the average driving speed at a particular intersection averages μ = 35 mph with a standard deviation of σ = 7.5 mph. After a school speed limit sign of 20 mph is placed at the intersection, the first 40 cars travel past at an average speed of 32 mph. Using the .01 significance level, was there a significant change in driving speed? a. Use the five steps of hypothesis testing (report results in APA format). b. Sketch the distributions involved. c. Figure the confidence limits for the 99% confidence interval.   3. (25 points) You will have to use a combination of StatCrunch and hand calculations (e.g., effect sizes) to solve the following problems. A social psychologist gave a questionnaire about concern for farm workers to seven participants before and after they attended a film about union organization of farm workers. The results are shown below with high scores meaning high concern. Using the .05 significance level, do these results support the hypothesis that the film affected concern for the lives of farm workers? Scores on the Concern Measure Participant Before After A 17 20 B 7 4 C 10 11 D 13 15 E 8 5 F 9 8 G 11 14 a. Use the five steps of hypothesis testing. b. Figure the effect size and find the approximate power of this study. c. Report results in APA format.   4. (25 points) You will have to use a combination of StatCrunch and hand calculations (e.g., effect sizes) to solve the following problems. A team of cognitive psychologists studying the effects of sleep deprivation on short-term memory decay had eight participants stay in a sleep lab for two days. Four participants were randomly assigned to a condition in which they were not permitted to sleep during that period, while the other four participants were allowed to sleep when they wanted to. At the end of the two days, the participants completed a short-term memory task that yielded the results in the table that follows. Using the .05 significance level, did sleep deprivation reduce short-term memory? Mean Number of Letters Remembered Sleep Deprived Normal Sleep 7 9 8 8 7 11 9 7 a. Create the appropriate graph for this problem. b. Use the five steps of hypothesis testing. c. Figure the effect size. d. Report results in APA format.
This project has already been completed on Studybay
On Studybay you can order your academic assignment from one of our 45000 project experts. Hire your expert directly, without overpaying for agencies and affiliates!

### See other similar orders

#### Studybay assignment progress timeline

Studybay is a freelance platform where you can order a Assignment 4 Statistical Reasoning in Psychology (PS390) paper, written from scratch by professors and tutors.
08 November 2018
User created a project for Psychology
08 November 2018
18 experts responded
08 November 2018
User contacted expert Noeala
08 November 2018
User hired expert Noeala who offered a price of \$30 for the project and has experience doing similar projects
15 November 2018
The expert completed the project Assignment 4 Statistical Reasoning in Psychology (PS390) for 7 days, meeting the deadline
15 November 2018
User accepted the project right away and completed the payment
15 November 2018
User left a positive review

## Random blog posts

For students who study mathematics, there are many courseworks that you need to complete to prove your knowledge and get high grades. For example, your professors may ask you to complete different academic assignments about an absolute value. This means that you should know how to find the absolute value of a number with ease because the theory behind it is quite significant when it comes to solving equations. It’s all about measuring how far a given number is from 0, so think about a number line that has zero in its center and ask yourself how far away you’re from this point. Many students don’t like mathematics, and if you’re one of them, take into consideration a number of effective tips and the services, including essay editing, offered by qualified freelancers who are easy to find online because they are quite affordable and of the highest quality.
Support
1-855-407-7728