Name Dale Mini -Check 5-Mr. Wynn For problems 1 and 2 below, identify the null and alternative hypotheses and state which is the claim. 1) A computer company daims that less than 2 percent of all its computers crash. 2) Toyota says that the Prius will get, on average, 48 miles per gallon. For problem 3 below, draw a scatter plot, find the correlation coefficient, the line of best fit, and make the required prediction. 3) It is thought that there is a correlation between the number of hours a shopper spends in the mall and the amount of money spent. Using the data below, create a scatter plot. Hours 10 8 3 2 5 6 in the Mall Dollars 40 15 24 35 50 100 60 70 93 Spent Scatter Plot Correlation Coefficient = Line of Best Fit Equation About how much money would you expect to spend if you stay in the mall for 6.5 hours? 4) The data below shows The age of students at VSU and their final average in the Calculus 1 course. Create a scatter plot for this data and describe the correlation if any of the data. Age 17 19 21 23 35 18 20 43 Average 78.3 65.4 88 5 90 94 69.7 83.2 94.1 b) Find the linear regression equation that best fits the data and use it to predict the grade of a 22 year old student in a Calculus course. Does this prediction make sense