Statistics Questions And Answers Pdf Grade 12
Galeno Kent
On the Answer Key page, allocate the correct answers to each numbered question for your assignment. You can create multiple versions of the same bubble sheet assignment, each having individual answer keys.
On the Answer Key page, you can create up to five different versions of the assignment by selecting the +Add Version button. Each version can have its own answer key, point value, and scoring settings. To delete the last created version, select the red X.
If your assignment has multiple versions, instruct your students to mark their version on their answer sheet. Different versions of the same bubble sheet assignment can be scanned together as a single PDF file. You do not need to pre-sort the submissions by version; Gradescope does this automatically.
If we have been unable to automatically assign a version to a submission, you will be informed on the Manage Submissions page. The number of uncertain versions will be highlighted at the top of the page, and a question mark will be displayed under the Version column for the affected student(s).
Occasionally, Gradescope needs more information to be more confident about what a student has selected as their answer. This could be because the bubble was not fully shaded, or they changed their mind.
If your assignment has multiple versions, you can view, publish, and download grades for a specific version by selecting the individual version's tab located at the top of the Review Grades page. Select the All tab to action all of the versions at once.
If your institution has LMS (Learning Management System) integration enabled, you can post grades from your Gradescope assignment to the LMS via the Post Grades to [LMS Name] button on the Review Grades page.
You can view quiz statistics for quizzes that have been published and have at least one submission. You can also download comma separate value (CSV) files to view Student Analysis or Item Analysis for each quiz question. For more detailed information about item analysis limitations and calculations, please refer to the Item Analysis resource document.
For optimum course performance in the Canvas interface, quiz statistics will only generate for quizzes with 100 or fewer unique questions or 1000 total attempts. For instance, a quiz with 200 questions will not generate quiz statistics. However, a quiz with 75 questions will generate quiz statistics until the quiz has reached 1000 attempts. Results greater than these maximum values can be viewed by downloading the Student Analysis report and viewing the CSV file.
By default, the quiz summary shows statistics for all sections including the quiz average score, high score, low score, standard deviation (how far the values are spread across the entire score range), and average time of quiz completion [1].
If a student had multiple assignment attempts, you can view past attempts in SpeedGrader. Quiz stats will only display the kept score for the student (highest score or latest score). To view the score setting for multiple attempts, edit your quiz and view the multiple attempts settings option. If necessary, you can give your students an extra attempt.
Download CSV files to view Student Analysis or Item Analysis for each quiz question to count all student attempts in the statistics. For more detailed information about item analysis limitations and calculations, please refer to the Quiz Item Analysis resource document.
Each question includes a breakdown with each question answer choice. Correct answer response(s) are shown in a green bar with a check mark [2]; incorrect responses are shown in a black bar [3]. Question types that do not have set answer choices, such as Fill-in-the-Blank questions, display entries other than the correct answer in a black striped bar [4]. The horizontal bars are scaled according to the answer response percentage [5].
Each response also displays the number of respondents who selected the answer [6]. To view the names of the students who selected an answer choice, click the [x respondents] link.
Quiz statistics also show relative grade performance for manually graded essay and file upload quiz question types. Manually graded question types are shown in the same table format as other quiz types.
Grade breakdown responses are shown as the top 27% [1], middle 46% [2], and bottom 27% [3]. The statistics also show submissions that have not yet been graded [4]. However, if all scores are identical, a response category may show more than the percentage number of students (e.g., all students score 100%).
True/False and Multiple Choice quiz questions include an item discrimination index, which provides a measure of how well a single question can tell the difference between students who do well on an exam and those who do not.
It divides students into three groups based on their score on the whole quiz: the top 27%, the middle 46%, and the bottom 27%. The number of correct answers from the bottom group is subtracted from the number of correct answers in the top group, then the total is divided by the size of the group.
Lower discrimination scores are scored +0.24 or lower; good scores are +0.25 or higher. An ideal discrimination index shows students who scored higher on the quiz getting the quiz question right, students who scored lower on the quiz getting the quiz question wrong, and students in the middle range on either side. A discrimination index of zero shows all students getting the quiz question right or wrong.
Statistics is the study of variability. Students need to be able to identify and pose questions that can be answered by data that vary. The purpose of this task is to help students learn to distinguish between statistical questions and questions that are not statistical. A statistical question is one that can be answered by collecting data and where there will be variability in that data. This is different from a question that anticipates a deterministic answer. For example, "How many minutes do 6th grade students typically spend on homework each week?" is a statistical question. We would answer this question by collecting data from 6th graders, and we expect that not all 6th grade students spend the same amount of time on homework (meaning there will be variability in the data). On the other hand, "How much time did Juana spend on homework last night?" is not a statiscal question--it has a deterministic answer and is not answered by collecting data that vary.
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A particular item enters the CPI sample through a process called initiation. This initiation process, typically carried out in person by a CPI data collector, involves selecting a specific item to be priced from the category that has been designated to be priced at that store. For example, suppose a particular grocery store has an outlet where cheese will be priced. A particular type of cheese item will be chosen, with its likelihood of being selected roughly proportional to its popularity. If, for example, cheddar cheese in 8 oz. packages makes up 70 percent of the sales of cheese, and the same cheese in 6 oz. packages accounts for 10 percent of all cheese sales, and the same cheese in 12 oz. packages accounts for 20 percent of all cheese sales, then the 8 oz. package will be 7 times as likely to be chosen as the 6 oz. package. After probabilities are assigned, one type, brand, and container size of cheese is chosen by an objective selection process based on the theory of random sampling. The particular kind of cheese that is selected will continue to be priced each month in the same outlet.
This item will be repriced, monthly or bimonthly, until it is replaced after four years through sample rotation. Repricing is usually done in person, but may be done via telephone or the internet. The process of selecting individual quotes results in the sample as a whole containing a wide variety of specific items of a category roughly corresponding to consumer purchases. So the cheese sample (or the new vehicle sample, the television sample, etc.) contains a wide variety of styles and brands of cheese, vehicles, televisions, etc.
Recorded price changes are weighted by the importance of the item in the spending patterns of the appropriate population group. The combination of carefully selected geographic areas, retail establishments, commodities and services, and associated weight, gives a weighted measurement of price change for all items in all outlets, in all areas priced for the CPI.
As an economic indicator. The CPI is the most widely used measure of inflation and is sometimes viewed as an indicator of the effectiveness of government economic policy. It provides information about price changes in the Nation's economy to government, business, labor, and private citizens and is used by them as a guide to making economic decisions. In addition, the President, Congress, and the Federal Reserve Board use trends in the CPI to aid in formulating fiscal and monetary policies.
As a deflator of other economic series. The CPI and its components are used to adjust other economic series for price changes and to translate these series into inflation-free dollars. Examples of series adjusted by the CPI include retail sales, hourly and weekly earnings, and components of the National Income and Product Accounts.
The CPI is also used as a deflator of the value of the consumer's dollar to find its purchasing power. The purchasing power of the consumer's dollar measures the change in the value to the consumer of goods and services that a dollar will buy at different dates. In other words, as prices increase, the purchasing power of the consumer's dollar declines.
As a means of adjusting dollar values. The CPI is often used to adjust consumers' income payments (for example, Social Security), to adjust income eligibility levels for government assistance, and to automatically provide cost-of-living wage adjustments to millions of American workers. The index affects the income of more than 90 million people because of statutory action: over 65 million Social Security beneficiaries and over 38 million Supplemental Nutrition Assistance Program (SNAP) recipients (formerly food stamps), among other programs.
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