Construct an 80% confidence interval for the difference between the mean score for the two types of instructions. Let u1 denote the mean final exam score for students taking the course online. Use tables to find the critical value and round answered to at least one decimal place.How do you find the standard deviation?Please show steps

All Peffectiveness of distance learning: A study was done to compare the effectiveness of distance learning with traditional classroom instruction. Fourteen students took a business administration course online, while students took it in a classroom. The final exam scores were as follows. It is reasonable to assume that the samples come from populations that are approximately normal. Online 61 70 80 59 83 72 71 16 3.341 88 69 66 74 80 62 70 1005:1= 0:0+39 303#g3 X, rain pherror is obtained by thull 21. 7857 142 9 = 71. margin of error is 2 2 -1 Classroom 71 80 56 75 83 71 84 77 79 55 83 81 83 70 59 70 Send data to Excel a) Construct a 950% confidence interval for the difference in mean scores for the two types of instructions. Let M] lenote the mean score of online instruction. Use the table. ) An educator claims that both methods of instruction are equally effective. Does the confidence terval contradict this claim? EXPLA