Using Minitab software.

1. In 2009, 33% of Americans felt that one parent should stay hometo raise the children instead of using daycare.In a poll conducted in2011, 416 out of 1015 Americans believed that one parent should stayhome.At a 99% level of confidence, is there sufficient evidence toconclude that the percentage has increased from its 2009 value?
2. Suppose that the standard deviation of the weight of the M&M-Mars candy was0.75 grams before a machine recalibration. The quality-control engineer wants to test if therecalibration resultedin more consistentweights. Conduct the appropriate test with a 95%confidence level. Here is the sample data:

19.68	20.66	19.56
19.98	20.65	19.61
20.55	20.36	21.02
21.50	19.74