Determine if the frequency distribution is a Normal (bell-shaped) distribution or not. Ages Number of students 15-18 1.2 19-22 2.2 23-26 3.9 27-30 4.1 31-34 1.8 35-38 1.1 Approximately Normal O Not NormalThe data below represents the number of T-shirts sold per week by a student who started his own online t- shirt business. Find the weighted mean of the number of t-shirts sold per week. (Round your answer to the nearest tenth if necessary.) T-Shirts Sold per Week Frequency 4 8 5 12 7 16 2 Weighted mean =The average resting heart rate of a population is 88 beats per minute, with a standard deviation of 11.5 bom. Find the z-scores that correspond to each of the following heart rates. Round your answers to the nearest hundredth, if necessary. (a) 120 bpm 7 = (b) 70 bpm 7 =Ca 9 10 11 12 13 14 15 16 17 18 data a Based on the boxplot above, identify the 5-number summary. What is the range of this data: What is the interquartile range of this data: Minimum?: Median?: Maximum?:The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 130, while the mean score was 78 and the standard deviation was 11 45 56 67 78 89 100 Distribution of Test Scores Q What is the approximate percentage of students who scored higher than 100 on the test? What is the approximate percentage of students who scored between 56 and 100 on the test? What is the approximate percentage of students who scored between 67 and 78? What is the approximate percentage of students who scored lower than 45 on the test?A sample was done, collecting the data below. Calculate the standard deviation, to one decimal place. X 24 22 25 13 6