Which fraction is the same as 1 8 + 1 8 + 1 8 ? a) 1 24 b) 3 24 c) 3 8 d) 4 8

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population, find the population standard deviation, o.79828588912497

Evaluate cos2θ for cosθ = square root of 3/2

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)