PLEASE HELP I HAVE BEEN IGNORED FOR MY LAST SIMILAR QUESTION
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 4% 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.
Stacey Warren - Expert brainly.com
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Do you think you could help me @ganeshie8 ?
Or @zepdrix ?
A 95% confidence interval for the population mean is an interval such that on average, 95 out of every 100 such intervals will contain the population mean.
Does this help you to make the correct choice of answer.