Question

I feel test for a new exam was given to randomly selected seniors the exam was graded and then sample mean and simple standard deviation we are calculated based on the results of the exam creator claims that on the same exam nine times out of 10 the seniors will have an average score within 3% and 70% of the coefficients interval was 90% 95% of 99% what is the margin of error calculate the confidence interval and explain what it means in terms of the situation

2. (09.07) A field test for a new exam was given to randomly selected seniors. The exams were graded, and the sample mean and sample standard deviation were calculated. Based on the results, the exam creator claims that on the same exam, nine times out of ten, seniors will have an average score within 3% of 70% Is the confidence interval at 90%, 95%, or 99%? What is the margin of error? Calculate the confidence interval and explain what it means in terms of the situation. (10 points) B i U Font Family - AA A OE- I 3. (07.06 MC) The graph of f(x) = 2 + 1 is shown below. Explain how to find the average rate of change between 0 and X-5. (10 points) SAVE & EXIT SUBMIT ALL ANSWERS 7 30 hip f &

Answer 1

confidence level, As the creator claims that a times out of 10 , the seniors will have the average score within 3 % and 70 %, so The confidence level is 90 X 100% = 90 % Margin of Error The average score lies between 34. and 70%, so the margin of error is 3%.. Confidence inlerval, The lower limit of the confidence interval is 70-4. –34 = 674 The upper limit 704, +394 = 73% Explanation: The exam creator is 90% confident such that everge scores of the seniors will be between 67% and 734