Psychology 215 – Basic Statistical Methods - AndrzejewskiProblem Set #10Submit a document with the answers to the following questions along with an Excel workbookwith the appropriate computations. Be sure to report the appropriate statistics.1. A cognitive psychologist was interested in the ability to solve puzzles. They selected 24college sophomores and matched them on the basis of IQ and assigned them, in groups of four,to one of four puzzle conditions (six blocks of four). The psychologist wants to make sure thatall the puzzles are equally difficult. The dependent variable was the amount of time it took for asubject to complete the puzzle. The data are presented below. Were there differences in puzzledifficulty at the .05 level? Make sure to complete a 6-step hypothesis test.Block12345-327872125252343833323634Puzzle33136304139404403732384639

Block |Puzzle 1 2 3 4 1 23 34 31 40 2 25 38 36 37 3 27 33 30 32 4 28 32 41 38 5 25 36 39…

Answered: A cognitive psychologist was interested…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Thomas makes five paper airplanes with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each airplane to fall to the groupld. A. What is the independent variable? B. What is one control variable?
Twenty-nine college students, identified as having a positive attitude about Mitt Romney as compared to Barack Obama in the 2012 presidential election, were asked to rate how trustworthy the face of Mitt Romney appeared, as represented in their mental image of Mitt Romney’s face. Ratings were on a scale of 0 to 7, with 0 being “not at all trustworthy” and 7 being “extremely trustworthy.” Here are the 29 ratings: 2.6 3.2 3.7 3.3 3.4 3.6 3.7 3.8 3.9 4.1 4.2 4.9 5.7 4.2 3.9 3.2 4.5 5.0 5.0 4.6 4.6 3.9 3.9 5.3 2.8 2.6 3.0 3.3 3.7 a 95% confidence interval for the mean rating. Is there significant evidence at the 5% level that the mean rating is greater than 3.5 (a neutral rating)?
A case-control study was conducted to examine the association between lung cancer and smoking in men. The case group contains 500 patients, who were diagnosed with lung cancer. Five hundred age-matched patients were recruited as controls. The study found that 50% of cases were regular smoking and the proportion is 20% among controls. a. Create a 2x2 table based on the given information
Use the following information for the question. A group of home gardeners want to test whether the type of soil used to grow heirloom tomatoes has an effect on the number of tomatoes harvested. Gardeners randomly assigned tomato plants to be grown in soil with no fertilizer, commercial plant food, and homemade compost. All other growing conditions were kept the same. Forty plants were assigned to each group. At the end of the growing season the number of tomatoes harvested was counted. Assume that all other conditions for the ANOVA test have been met.State the null and alternative hypothesis.
(c) Draw a boxplot of the differenced data. Does this visual evidence support the results obtained in part (b)? Which boxplot below represents the data? A. O C. -6 -6 -4 -2 Differences -2 Differences 2 Q 2대 B. -6 -6 -4 -4 -2 Differences Differences 0 0 2
Verbal intelligence was a topic that Jamie was very interested in. She conducted a study to see whether children with ADHD had lower scores on measures of verbal intelligence than those without ADHD. She divided children in her study into 4 groups- those clearly diagnosed with ADHD- combined type, those clearly diagnosed with ADHD- inattentive type, those with ADHD symptoms but not clearly diagnosed, and those without ADHD. Then she measured their scores on the Reading Comprehension task, Vocabulary task and Writing Task. What type of statistic did she run? A 4 way MANOVA A 4 way MANCOVA A one way MANOVA A Factorial MANOVA
The quantity of dissolved oxygen is a measure of water pollutants in rivers. Water samples were taken at three different locations in a river. You want to investigate whether the water pollution varied between locations, the independent variable in this study is: A. quantity of dissolved oxygen. B. water samples. C. river locations. D. polluted river. Answer B.
Can I get some help with identifying the variables and individuals?
A matched-pair case-control study was conducted in order to assess if there is a relationship between serum Vitamin D levels and migraine headaches. The results are shown below: Control Control With migraine No Migraine 22 49 (Case) High Vitamin D (Case) Low Vitamin D 36 18 What would be the total number of participants with migraine after we unmatched the pairs? Answer should be in numerical form. Avoid extra spaces before and after your answers. Answer should be a whole number; no decimal points.
Direction: Explain each study described in each scenario. (Sample Surveys Study, Experiment Study or Observational Study). Please answer only (Sample Surveys Study, Experiment Study or Observational Study) and please explain why. Thank you so much and God bless!
Duncan wants to collect all available text data within the company to determine which data he should include in his text analysis. He found many datasets but is unsure which can be included in text analytics. Which of the following is NOT an example of text data? A.Customer feedback on the restaurants (describing what they liked and didn’t like) collected in an online survey B.Yelp reviews for the restaurant, in which customers describe their experiences at the franchise locations C.The content of tweets posted on Twitter about the restaurant during a given week D.A dataset of all active Twitter users that follow the company, that includes demographic data about the customers such as their age and annual income
During the 2016-2017 season, the University of South Carolina Men's Basketball team made it to the final 4. The Lady Gamecocks made it to the final four and won the National Championship. Below are the number of points each team scored during each of the games they played during the 2016-2017 season. Use the back-to-back stem and leaf plot to answer the questions. How many games did each team play? The men played ___ and the women played ___ games. What is the mean points of each team? The men scored an average of ___ points and the women scored an average of ____ points (round to the nearest point) What is the range of the points of each team? The men scored a range of ____ points and the women scored a range of ____ points. What is the population standard deviation for each team? The men had a standard deviation of _____ points and the women had a standard deviation of _____ points (round to nearest hundredth). Based on the standard deviation, which team's points varied more?…

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