To find 97.5% Confidence Interval for population mean µ, use the critical value ?
If the area inside the density curve is 97.5% how do I find the area on each right and left tail. I was...

The time until maturity of a certain variety of tomato plant normally distributed with mean µ and standard deviation σ = 2.4 days. I select a simple random sample of four plants of this variety...

If a specimen is weighed 8 times on a scale. σ = 0.001. The average weight is 4.1602 grams. A 99% confidence interval for the true weight of this specimen would be?

If we have an SRS of 1600 students and the sample mean = 148. Compare with an SRS of 900 students with the margin of error for a 95% confidence interval of µ is ? the answer should be...

One roofing crew can finish a 2,800-sqaure-foot roof in 12 hours, and another crew can do the job in 10 hours. If they work together, can they finish before a predicted rain in 5 hours...

Question 1: Why is it that when a flourescent bulb touches or is placed withing 3 inches or less of a plasma globe, it lights up? I did some research on plasma bulbs and the metal ball in the center...

how do you find the distance between two points, on a graph? I need homework help, and this question is confusing for me. The points are (-3,2) and (4,-4)

A slot machine has 3 wheels. Each wheel has 10 positions: a bar, and digits 0,1,2... When the handle is pulled the three wheels spin independently before coming to rest. Find the probability of:
Getting...

Factor each polynomial completely... I just don't get it. At all. I pay attention in class, but it just doesn't register in my mind. Please help me with the problem.