1.You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study
Posted: Thu Jul 14, 2022 4:51 pm
1.You want to obtain a sample to estimate how much parents spendon their kids birthday parties. Based on previous study, youbelieve the population standard deviation isapproximately σ=79.9. You would like to be 98% confident thatyour estimate is within 1.5 dollar(s) of average spending on thebirthday parties. How many parents do you have to sample?
a.Given a standard normal distribution with area in the righttail: P(z > c) = 0.174 Find c rounded totwo decimal places.
b.Given a standard normal distribution with area in the lefttail: P(z < c) = 0.7177 Find c rounded totwo decimal places.
a.Given a standard normal distribution with area in the righttail: P(z > c) = 0.174 Find c rounded totwo decimal places.
b.Given a standard normal distribution with area in the lefttail: P(z < c) = 0.7177 Find c rounded totwo decimal places.