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Write the null and alternative hypotheses.
You want to see if the number of minutes cell phone users use each month has changed from its mean of 120 minutes 2 years ago. You take a random sample of 100 cell phone users and find an average of 135 minutes used.
A. H0: μ = 135HA: μ > 135B. H0: μ = 120HA: μ < 120C. H0: μ = 120HA: μ ≠ 120D. H0: μ = 120HA: μ > 120E. H0: μ = 135HA: μ ≠ 135
Assuming both retire at 70, and that the interest rate both get on their investments is 10% (compounded annually) who has the most money in their account at age 70? Explain why you pick the answer you pick.
If we graph this data with Total Cost on the Y axis (Vertical axis) and the Quantity Produced on the X axis (Horizontal axis) what do you think will be the shape of the line
Are there points on the curve y = (x - 1)^2 where Gradient f is perpendicular to the curve? Find the absolute maximum and minimum of the function in the region 1 >= x >= 0 and y >= 0.
Let A, B, C be sets and let X be a set containing A, B, C as subsets. Prove that A intersects (B union C)= (A intersects B) union (A intersects C)
Objective questions based on regression.
Find the height at which the light has to be fixed to get its use in maximum area using its perimeter function
It is a common experience to hear the sound of a low flying airplane, and look at the wrong place in the sky to see the plane. Suppose that a plane is traveling directly toward you at a speed of 200 mph and an altitude of 3,000 feet
Explain the five-steps for solving rational equations. Can any of these steps be eliminated? Can the order of these steps be changed? Would you add any steps to make it easier, or to make it easier to understand?
Two rainstorms occurred in one week in a certain area. In the first storm 25ml of rain fell per hour, and in the second storm 20ml of rain fell per hour. Rain fell that week for a total of 75 hours for a total rainfall of 1700ml.
Evaluate the integral by completing the square and using the following formula. (Remember to use ln |u| where appropriate.)
Solve the following system of linear inequalities by graphing.
There are 12 light bulbs, 5 of which are defective. All bulbs look alike and have an equal probability of being chosen. Three light bulbs are selected and placed on the table.
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