I sampled 73 ACT scores and found their average to be 23. Find the 95% confidence interval for the true mean of all ACT scores. The standard deviation of all ACT scores is 4.1.

Type the correct answer in each box. use numerals instead of words. if necessary, use / for the fraction bar. consider the given table.

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.

Your company withheld $4,463 from your paycheck for taxes. you received a $713 tax refund. select the best answer round to the nearest 100 to estimate how much you paid in taxes.