Is △pmr similar to △smn ? if so, which postulate or theorem proves these two triangles are similar? △pmr is similar to △smn by the ssa similarity theorem . △pmr is similar to △smn by the sas similarity theorem . △pmr is similar to△smn by the sss similarity theorem . △pmr is not similar to △smn . a triangle with vertices p m r. segment s n is inside the triangle. point s is on side p m. point n is on side m r. p s is equal to 8 feet. s m is equal to 14 feet. m n is equal to 21 feet. n r is equal to 12 feet.

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t. inv.2t to find the value of t for the interval calculation.