Math Answers

The number of driving miles before a certain type of tire begins to show wear is on the average 18,200 miles with a standard deviation σ = 3,500 miles. If Jack Car Rental Agency buys 25 of these tires for replacement purposes and parts each one on a different car, compute the mean μ x̅ and standard deviation σ x̅ of the sampling distribution of the sample means.

In Two independent tosses of an unbiased coin the sample space set contains ….elements

1. 4
2. 3
3. 2
4. 1

The significance level is the risk of:

1. Rejecting Ho when Ho is correct
2. Rejecting Ho when H1 is correct
3. Rejecting H1 when H1 is correct
4. Accepting Ho when Ho is correct

∫4 sin 8t cos 3t dt

In hypothesis testing the type of the test to be used (one or two tailed) is determined by

The y intercept is the point where the line intersects the x-axis. Is this statement true or false

The mean number of hours a Filipino worker spends on the computer is 3.1 hours per workday. Assume the standard deviation is 0.5 hours and is normally distributed, how long does a worker spend on the computer if his z-score is 1.2?

Integrate :

(1/2*sin2x-cos^2x)/(sin^2x-cos^2x)

1. Find the value of the finite population correction factor when:

a)   n = 10 and N = 10000

b)   n = 40 and N= 10,000

How a large sample should be surveyed to estimate the true proportion of college students who do a laundry once a week within 3% with 95% confidence?