# Activity 3.5 applied statistics answer key doc. Activity 3.5 Applied Statistics

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## Activity 3.5 Applied Statistics Population standard deviation is displayed when using the Data Analysis Tool in Excel. Describe the difference between population standard deviation and sample standard deviation. Describe a scenario in which you would use each. The standard deviation shows how many of the measured objects will be between 68, 95, and 99. The statistics of a products dimensions can be used to make the product more accurate 2. Which type of standard deviation population or sample is displayed when the Data Analysis Tool is used within Excel? Population standard deviation refers to an entire group of people or things Blocks: All the blocks.

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## Applied Statistics Population standard deviation is the measure of the entire population. You can use the spreadsheet to create a dot plot, bar graph, or histogram. That quality is also based on the acceptable value of a part within a whole product. Example for population standard deviation would be asking a classroom the number of people that have siblings. You will also represent the data using a histogram. Introduction Engineers use various tools to make their jobs easier. How do the statistics that you calculated using Excel compare to the statistics that you calculated by hand for the connector depth data? Other than the calculation of statistics, how could an engineer use a spreadsheet application to increase efficiency? Population is the type of standard deviation that is used to display when the Data Analysis Tool is used within Excel, because its not a random selection its more selected.

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## Activity 3.7 Statistical Analysis Describe the difference between population standard deviation and sample standard deviation. An engineer could use a spreadsheet for just general organization of that data they collected statistics for. Statistics are most useful when wanting correct measurements of an object. We will represent this data using a histogram. The statistics in excel are different because when you calculate the stats by hand you may round different than the computer. Where in a sample population you would ask the whole population would be not possible to survey the whole population. This activity will allow you to apply statistics in order to analyze and determine the quality of a set of wooded cubes.

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## Activity 3.5 Applied Statistics In this activity you will collect data and then perform statistical analyses to determine measures of central tendency and variation of the data. Sample standard deviation is the standard deviation of a group of a population. The closer it is to the desired measurement the better the project. In this activity you will collect data and use Microsoft Excel to perform statistical analyses and create a statistical chart to display your data. Some would say the designer creates specifications, which in turn dictate the quality of a product. Sample standard deviation is a measure of a group. Because you'll need statistics to complete the product and show it to the audience.

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## Activity 3.5 Applied Statistics Statistics show correct measurements for an object and it takes it deeper by showing the mean, median, mode, and standard deviation. How and by whom is quality determined? In which phase s of a design process might statistics be most useful? How do the statistics that you calculated using Excel compare to the statistics that you calculated by hand for the connector depth data? Statistics are commonly used in manufacturing processes to control and maintain quality. Presentations so that you can demonstrate in a way people can understand more fully what you're saying. To load the Analysis ToolPak follow the instructions of your instructor or read Analysis ToolPak Loading Instructions. Which type of standard deviation population or sample is displayed when the Data Analysis Tool is used within Excel? In this activity you will collect data and use Microsoft Excel to perform statistical analyses and create a statistical chart to display your data. If you were to take the total number of students in a School and then find the standard deviation of a class' population, that'd be sample standard deviation.

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## Activity 3.7.A Other than the calculation of statistics, how could an engineer use a spreadsheet application to increase efficiency? The contruction part of the process is what it'll be more useful Why? Spreadsheets can greatly improve the accuracy and efficiency of repetitive and common calculations; therefore, engineers often employ spreadsheet applications in their work. . Procedure In this activity you will collect data and then perform statistical analyses to determine measures of central tendency and variation of the data. . .

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## Activity 3.7 Statistical Analysis . . . . .

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## Applied Statistics . . . . . . .

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## Activity 3.5 Applied Statistics . . . . .

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