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- The table shows the number of hours 9 students spent studying for a test and their scores on that test. What would be the predictable score when a student studied for 4.5 hours? Hours spent studying, x 0 2 4 5 5 5 6 7 8 Test scores, y 40 51 64 69 73 75 93 90 95 A. 67 B. 68 C. 69 D. 71CHART ATTACHED. PLEASE USE EXCEL FORMULAS FOR ME TO FOLLOW WHEN APPLICABLE The Standard Issue Test Prep company offers an ACT prep course designed to help students improve their scores on the ACT exam. A mock exam is given at the beginning of the course to see where students are starting from. A sample of 27 students' scores are taken and given below: Using this data, answer questions below. CAUTION! If you are using your calculator for Parts A and B, double-check that you entered the data in your calculator correctly. One minor mistake in data entry can lead to a drastically different answer! Find the mean: ___________________. Round your answer appropriately. Find the standard deviation: ___________________. Round your answer appropriately. Assuming the population is normally distributed, construct a 95% confidence interval for the mean mock exam. Show all relevant work and follow these expectations: Your work should be easy to read and follow. Use…The table below shows the number of state-registered automatic weapons and the murder rate for several Northwestern states. 11.6 8.5 7. 3.5 2.6 2.3 2.4 0.4 13.8 11 10 6.3 6.1 5.9 4.1 I = thousands of automatic weapons y = murders per 100,000 residents This data can be modeled by the equation y = 0.85T + 3.97. Use this equation to answer the following; A) How many murders per 100,000 residents can be expected in a state with 1.2 thousand automatic weapons? Answer = Round to 3 decimal places. B) How many murders per 100,000 residents can be expected in a state with 2.2 thousand automatic weapons? Answer = Round to 3 decimal places. Question Help: O Message instructor Submit Question to search 1O