a.Last year, 72% of Nanosoft, Inc. employees are college educated. This year, through a random sample of 500 employees at NanoSoft, Inc. shows that 375 employees are college educated. Is there statistically significance evidence to show that there is an increase in the percentage of employees at Nansoft, Inc. who are at least college educated?

b.Based on the data from the simple random sample of 80 adults in Los Angeles they found that the average amount spent on dinner last Friday night is $53.00 per person with standard deviation of $10.75. Construct a 98% confidence interval for all adults in Los Angeles spent on dinner last Friday. And provide an interpretation for this confidence interval.