Atoy manufacturer wants to know how many new toys children buy each year. a sample of 601 children was taken to study their purchasing habits. construct the 95% confidence interval for the mean number of toys purchased each year if the sample mean was found to be 6.7. assume that the population standard deviation is 1.5. round your answers to one decimal place.

The correct answer would be the fourth choice

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle