Standard deviation worksheets - quantitive reasoning math!

Be sure to show all work and answer each question on each worksheet... label the work sheets 1-3

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Standard Deviation Worksheet of Power Name: Per: "Calories in Brownies" Brownie, Prepared According to Package Directions Calories in One Piece Pillsbury caramel fudge chunk 170 Betty Crocker caramel swirl 120 Betty Crocker German chocolate 160 Nestle double chocolate chip 150 Pepperidge Farm hot fudge 400 Duncan Hines milk chocolate 160 Betty Crocker microwave frosted 180 Robin Hood Gold Medal pouch mix 100 Duncan Hines peanut butter 150 Pillsbury triple, cl 170 1.) Find the mean 2.) Find the standard deviation (round answer to two decimals) 3.) Fill in the values on this normal distribution graph. 4.) What is the range of calories for the middle 95% of this sample of brownies? 5.) What is the approximate probability of a brownie being less than 254 calories?The Coolest Standard Deviation Worksheet You Will Ever Do Name: Per: "Final grades from select students in one of my QR classes from Spring 2021" 81, 80, 81, 63, 91, 74, 94, 69, 62, 86, 80, 45, 43, 81, 75 1.) Find the mean 2.) Find the standard deviation (round answer to two decimals) 3.) Fill in the values on this normal distribution graph. 4.) What is the range of calories for the middle 95% of this sample of grades? 5.) What is the approximate probability of a student scoring more than 59%?"Final grades from ALL students in my QR classes from Fall 2021" *Disclaimer - I did not include 3 more F's in the scores because they were too low!!! (like, less than 5% low on one of them ...) grade frequency Elf (x - #) 2] n 50-59 2 60-69 7 70-79 6 80-89 12 90-100 6 1.) Find the mean 2.) Find the standard deviation (round answer to two decimals) 3.) Fill in the values on this normal distribution graph. 4.) What is the approximate probability of a student scoring between a 67% and 90%