You want to estimate the mean number of songs college students store on their portable devices with a margin of error of no more than 20 songs. If the population standard deviation is 68, then how many students should you sample for a 90% confidence interval?

How do you create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1?

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4

Whit h equation best represents this situation the number 98 increased by an unknown number equal to 120