[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-313728-105":59,"doc-detail-313728-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","statistics-practice","Statistics Practice","","Practice questions focused on core statistics concepts from AP Psychology exam materials, including normal distribution properties, standard deviation interpretation, z-scores, percentiles, skewness, and variation across frequency distributions. The set also covers identifying independent and dependent variables in a study scenario, recognizing interactions between variables, interpreting correlation coefficients for prediction, and determining which descriptive measure is most influenced by extreme scores. Additional problems address standard deviation calculations and translating raw scores into standard deviations or z-scores.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/statistics-practice/313728/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/statistics-practice/313728.png","ImageObject",300,407,{"name":92,"@type":93},"Jacob","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-11-07","2026-09-20",true,{"@type":102,"interactionType":103,"userInteractionCount":56},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does the area between one standard deviation above and below the mean represent in a normal distribution?","Question",{"text":112,"@type":113},"It corresponds to the middle 68% of the distribution.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How do you find a z-score from a test score given a mean and standard deviation?",{"text":117,"@type":113},"Compute (X - mean) / standard deviation, where X is the student’s score.",{"name":119,"@type":110,"acceptedAnswer":120},"How do you identify the independent and dependent variables in the drink-flavor study?",{"text":121,"@type":113},"Independent variables are the manipulated factors (flavor of drink and timing of consumption), while the dependent variable is the participants’ spelling test performance.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},313728,1790267202,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":56,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":24,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144,"preview_page_count":4},962084931830,"https://ap-avatar.wpscdn.com/davatar_a8503ba1806abce46bf441b54a3ca4cd","1. In a normal distribution, which of the following statements is true about the area that falls between one standard deviation above and one standard deviation below the mean? (2013 AP Psychology Exam)  \nA. It contains the bottom 50% of the distribution  \nB. It contains the middle 50% of the distribution  \nC. It contains the bottom 68% of the distribution  \nD. It contains the middle 68% of the distribution  \nE. It is the same as the square of the average deviation  \n2. On a test, the mean score for a class of 100 students is 80 and the standard deviation of the scores is 10. The professor who gave the test then realizes that she made a scoring error, which she corrects by adding 5 points to each student’s score. The standard deviation of students’ new scores is (2013 AP Psychology Exam)  \nA. 5  \nB. 10  \nC. 10.5  \nD. 15  \nE. 85  \n3. Tamar scores 145 on an IQ Test with a mean of 100 and a standard deviation of 15. What is her z-score?(Barron’s AP Psychology, 4E. )  \nA. -3  \nB. -1.5  \nC. +0.67  \nD. 1.5  \nE. +3  \n4. Sandy scores a perfect 100 on a test that everyone else fails. If we were to graph this distribution, it would be (Barron’s AP Psychology, 4E. )  \nA. Symmetrical  \nB. Normal  \nC. Positively skewed  \nD. Negatively skewed  \nE. A straight line  \n5. Which of the following is true of the frequency distributions shown in the graphs below? (2012 AP Psychology Exam)  \nA. Distribution A has more variation than distributions B or C.  \nB. Distribution B has more variation than distributions A or C  \nC. Distribution B and Distribution C have the same variation.  \nD. The standard deviation of distribution A is infinite.  \nE. The standard deviation of distribution B is zero.  \n6. A student’s test score is at the 42nd percentile. This means that the student has  (2007 AP Psychology Exam)  \nA. Received the 42nd highest score  \nB. Answered 86% of the test correctly  \nC. Scored the same as 42% of her fellow students  \nD. Scored the same as or higher than 42% of her fellow students.  \nE. Scored the same as or higher than 58% of her fellow students.  \n7. Which of the following correlation coefficients most likely represents the relationship between length of sleep deprivation and level of alertness? (2007 AP Psychology Exam)  \nA. 1.35  \nB. 0.85  \nC. 0.01  \nD. -0.4  \nE. -1.25  \n8. For a language test with a normally distributed scores, the mean was 70 and the standard deviation was 10. Approximately what percentage of test takers scored 60 and above? (2004 AP Psychology Exam)  \nA. 16  \nB. 34  \nC. 68  \nD. 84  \nE. 95  \n9. Which of the following sets of scores has the greatest standard deviation? (2008 AP Psychology Practice Exam)  \nA. 5,7,9,12  \nB. 2,7,9,12  \nC. 25,27,29,32  \nD. 50,51,52,53  \nE. 100,101,101,102,103  \n10.  \n\n| Set A | Set B |\n| --- | --- |\n| 60 | 60 |\n| 56 | 41 |\n| 58 | 76 |\n| 62 | 35 |\n| 61 | 65 |\n| 59 | 50 |\n\nWhich of the following is true of the two sets of scores to the left? (2008 AP Psychology Practice Exam)  \nA. Set A has a larger standard deviation  \nB. Set B has a larger standard deviation  \nC. The range is the same for both distributions  \nD. Set A has a lower median score than set B  \nE. The mean score is the same for both distributions  \nUse the following scenario to answer questions 11-13.  \nA student hypothesizes that high school students consuming different flavors of drink before a spelling test will perform differently. A study to test the hypothesis finds that with a bitter drink, performance is best 6 hours after drinking it, whereas with a sweet drink, performance is better 1 hour after drinking it.  \n11. Which of the following are the independent variables? (Study Guide to Accompany Martin’s Psychology)  \nA. Test scores and high school students  \nB. Test scores and time of consumption  \nC. Flavor of drink and time of consumption  \nD. Flavor of drink and high school students  \nE. Flavor of drink and test scores  \n12. Which of the following is the dependent variable? (Study Guide to Accompany Martin’s Psyc","cbCaimo0hYiAq8OS","https://ap.wps.com/l/cbCaimo0hYiAq8OS","pdf",295877,"English","# Normal Distribution & Standard Deviation\n## Percentages and Area Under the Curve\n## Z-Scores and Percentiles\n## Skewness and Frequency Distributions\n# Measures of Variation and Prediction\n## Correlation and Predicting Weight/Score\n## Mean, Median, Mode, and Impact of Extreme Values\n## Calculating Standard Deviation\n# Variables in Research Studies\n## Independent vs. Dependent Variables\n## Interaction Effects","[{\"question\":\"What does the area between one standard deviation above and below the mean represent in a normal distribution?\",\"answer\":\"It corresponds to the middle 68% of the distribution.\"},{\"question\":\"How do you find a z-score from a test score given a mean and standard deviation?\",\"answer\":\"Compute (X - mean) / standard deviation, where X is the student’s score.\"},{\"question\":\"How do you identify the independent and dependent variables in the drink-flavor study?\",\"answer\":\"Independent variables are the manipulated factors (flavor of drink and timing of consumption), while the dependent variable is the participants’ spelling test performance.\"}]","Statistics Practice | PDF",1789899260,13]