KINDLY HIGHLIGHT THE ANSWERS - brief explanation only.

PART A - Find Z and choose correct graph

Find the 2 value such that 97% of the standard normal curve lies between 2 and 2. (Round your answer to two decimal places.) I USE SALT Sketch the area described. A I A z I A A Z Suppose that the price marked on pairs of women's shoes is approximately normally distributed with mean $140.00 and standard deviation $21.00. A sample of 36 pairs of shoes is selected at random. (3) Find the mean of the sampling distribution of the mean price per pair. u; 2 s: Find the standard deviation of the sampling distribution of the mean price per pair. ms: X (b) what is the shape of the sampling distribution of the mean price per pair? 0 approximately normal 0 uniform 0 left skewed 0 right skewed Public health and safety officials have classified the Zika virus as a hazardous threat to pregnant women in Brazil. A study based in Rio found the virus to be more active near a body of water that was found to be polluted. A study of 20 water samples found an average chemical waste of 235 g per mile with a standard deviation of 12.24 g. LO USE SALT (a) What are the degrees of freedom for this study? (b) Find the 95% confidence interval (in g per mile) for this study. (Use a table or technology. Round your answers to three decimal places.) g per mile (c) What would happen to the margin of error if the sample size increased? O It would also increase. O It would decrease. O It would stay the same. O It would go to zero. (d) What would happen to the margin of error if the confidence level increased? O It would also increase. O It would decrease. O It would stay the same. O It would go to zero.Find 2 such that 4.9% 0! the standard normal curve lies to the left of 2. (Round your answer to two decimal places.) la USE SALT Sketch the area described. O Z 0 O Z 0