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At a certain university, 28% of the students major in zoology. Of all the students majoring in zoology, 68% are males. It is also known that 56% of all students at the university are male. Let Z represent the event that a randomly chosen student is majoring in zoology. Let M represent the event that a randomly chosen student is male.
(A) What is the probability a randomly chosen student is male and majoring in zoology?
(B) What is the probability that one randomly selected student is a male or is majoring in zoology, or both?
(C) What proportion of males at the university are majoring in zoology?
(D) What proportion of students are female and are not majoring in zoology?
(E) Are the events M and Z independent? Explain.
(F) Are the events M and Z mutually exclusive? Explain.
How many degrees of freedom must researcher use in her t-test critical value supposing that variances are equal?
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Consider the results of the hypothesis test you conducted above. Which of the two types of errors could you have committed? Explain the ramification of committing such an error in the context of this scenario.
Now he wants to know if there is a difference between the three formats. Is there?
An analyst thinks that the economic conditions during the next year will either be Strong, Normal or Weak and she thinks that the Simpson Company's returns will have the following probability distribution.
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Bingo Hamburger Co has a chain of 12 stores in a large city. Sales figures and profits for the stores are given in the following table. Obtain a regression line for the data & predict profit for a store assuming sales of $10 million.
Determine the probability that the project will be completed in 70 days or less.
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In a random sample of 35 trading days, the volume of a particular stock is recorded to determine whether the mean volume of the stock changed from its 2007 value of 35.14 million shares.
Sketch the appropriate distribution, and locate the critical region for a = 0.05.
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