Math Answers

a researcher reports that the average salary of college deans is more than Php 63,000 a sample of 35 college deans has mean salary of php 65,700

In a certain school, grade 11 students spend an average 14 hours, with a standard duration of 4 hours, in browsing their favorite social networking sites. The average time spent in a week by grade 11 students browsing their favorite social networking sites is 14 hours with a standard deviation of 4 hours. If a random sample of 35 students is selected, find the mean, variance and standard error of the distribution of all sample means that can be derived from the sample.

What is the temperature difference between 17°c maximum_ 3°c minimum?

Determine the cumulative distribution function for following:(2 Marks) F(x) 0 x < 0 0.2 x 0 <= x < 4 0.04 x + 0.64 4 <= x < 9 1 9 <= x

Suppose f(x) = 1. 5 𝑥 for -1 < x <1. Determine the mean and variance of X

The fixed cost of a company is 35000 and the variable cost per unit is 500 and the revenue function for sale is X units is given by R(x)=5000X-100X²

I) find the profit function

Ii) break even values

III)the values of X which results in a loss

The demand function is Q=280000-400p

Where Q equals the number of units demanded and p equals the price in dollars of the total cost of producing Q units of the product is estimated by the function

C=350000+300q+0.0015q²

I) how many units should Q produce in order to maximize its annual profit

Ii) what price should be charged

III) determine the annual profit expected

Solve the following using matrix algebra

2X+Y-Z=5

3X-2Y+2Z=-3

X-3Y-3Z=-2

suppose that iq scores within a population are normally distributed with a mean 100 and a sd 10 area enclosed under normAL CURVE FOR IQ SCORES ABOVE 130 IS

-8(2×2)+3×7+(-2)