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A researcher predicts that watching a film on institutionalization will change students' attitudes about chronically mentally ill patients. The researcher randomly selects a class of 36 students, shows them the film, and gives them a questionnaire about their attitudes. The mean score on the questionnaire for these 36 students is 70. The score for a similar class of students who did not see the film is 75. The standard deviation is 12. Using the five steps of hypothesis testing and the 5% significance level (i.e. alpha = .05), does showing the film change students' attitudes towards the chronically mentally ill?
What does it mean to set alpha at .05?
What is your null hypothesis? Alternate hypothesis?
Is this a one-tailed or two-tailed hypothesis?
What is the criterion z?
Suppose the obtained z was -2.5. Do you reject or fail to reject the null hypothesis?
State in words what you have found.
a farmer wants to fence off land along a river into five equal areas by using on section of fence parallel to the river and six sections perpendicular to it. what should the dimensions be to maximize the total area using 1200 feet of fence?
what is the correct classification of 18x?
Use the Newton-Raphson method of finding roots of equations to find the minimum number of computers that need to be sold to make a profit. Conduct three iterations to estimate the root of the above equations.
A square has a 40-cm diagonal. How long is each side of the square? Round your answer to the nearest tenth of a centimeter.
What is the circumference of the circle when A is a minium?
Prove that limn ->∞ xn exists and find it.
An arrow is accidentally shot into the air. The formula y = - 14x2 + 56x + 18 models the arrow's height above the ground, y, in feet, x seconds after it was released.
If t=0 at the start, for what values of t will the velocity of the particle A exceed the velocity of particle B.
there is a liquid motion due to a doublet of strength μ at the point (0,3α) with its axis along the Y axis.find the velocity potential
Consider a standard deck of playing cards. You randomly select a card from the deck and find that you have drawn a face card.
cassandra bought an antique dresser for $500. if the value of her increases 6^ annually, what will be the value of cassandra's dresser at the end of 3 years to the nearest dollars?
The following second order Differential Equations must be solved with the appropriate Infinite Series Method. You may verify DE with other method only after work is shown step by step using the infinite series methods.
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