6. There are over 385,000 babies born each day in the entire world. The Census Bureau states that there is not an equal proportion of boys and girls born. A random sample found that among 25,468 newborn children, the sample proportion of boys was 0.5172. a) What is the mean of the sample proportion? b) What is the variance of the sample proportion? c) Test the Census Bureau's claim at a 94% confidence level. Is their claim about this proportion accurate or not?

Consider the following random sample of data: 5, 10, 2, 4, 4,-4, -7, -5, 8, 84 a) What is the mean of the sample data? Round your response to at least 2 decimal places. Number b) If the outlier is removed, what is the mean of the remaining sample data? Round your response to at least 2 decimal places. Number

2. Jim Miller works in the personnel department for a car company. He is told by his supervisor to investigate the difference in the average number of sick days between blue collar workers and whitecollar workers. So he obtained a random sample of 9 blue collar workers and a random sample of 9 white collar workers. He records the results below.At 10% level of significance, is there sufficient evidence to indicate a difference in mean sick days between blue collar workers and white collar workers.

a) Work this problem manually (by hand) using the procedures and formulas for ANOVA to check if the Population Means for flying time before major maintenance is required are the same for the three types of aircraft.   To help you, Sample Means and Sample Variances have been calculated below for you:                      Airbus                Boeing737            Boeing 787                        6.4                           8.7                          9.9                        7.8                           7.4                          12.8                        5.3                            9.4                         12.1                       7.4                            10.1                        10.8                       8.4                            9.2                          11.3                       7.3                            9.8                          11.5 __________________________________________________________________ Sample Mean         7.1…