the following information was obtained from two independent random samples: the sample means of the two samples are (45, 42), sample variances are (85, 90) and sample sizes are (10, 12). assume normally distributed populations with equal variances. the 95% confidence interval for the difference between the two population means is

Find the area of shaded region z=-0.89

Alex is the head photographer for the yearbook and the newspaper. she has a large staff of assistant photographers because they need to take pictures at all of the school events. she knows that some of her photographers have better cameras and can take action shots at sporting events, and that some of them are good at taking candid pictures in the hallways. she sets firm deadlines so she has enough time to look through all of the shots and choose the best ones. she gives her photographers constructive feedback to them improve their pictures. respectful enforcer warlord doormat peacemaker

Compared with the cost of tuition, fees, and books for a traditional college course, the cost of a clep exam is: