In a random sample of 97 women at a company, the mean salary is $45,902 with a standard deviation of $3865. in a random sample of 75 men at the company, the mean salary is $48,454 with a standard deviation of $6677. which interval is the 95% confidence interval for the difference between the mean salaries of all women and men at the company? a) ($1133.20, $3970.80) b) ($856.36, $4247.64) c) ($1686.88, $3417.12) d) ($319.99, $4784.01)