Week 5 Revised E-text Assignment: (3 pts): Due August 2, 2010. Directions: Each question is worth 1.5 points. You may include the statistical software output, but you must also include a well-written explanation of the findings. Be sure to answer the ques
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Women 14476 21716 22133 24509 33959 37664 Men 51633 56457 None Women 25743 23321 None
1) What is a Type I error in terms of our null hypothesis ?
A type I error is basically a false alarm. That is, it is the probability of rejecting the null hypothesis when the null hypothesis is true.
2) What is a Type II error in terms of the null hypoth
1) Explain the difference between the null hypothesis and the alternate hypothesis. How is the null hypothesis chosen? Explain. What is the importance of rejecting the null hypothesis?
The null hypothesis is always the simpler hypothesis and is generally
Directions: If you work the problems using Excel or other statistical software, please include your output. If you use manual calculation, please show how you solved the problem. You must answer each part of the question to receive full credit. Please do
A mayoral election race is tightly contested. In a random sample of 1,100 likely voters, 572 said that they were planning to vote for the current mayor. Based on this sample, what is your initial hunch? Why would confidence intervals for a proportion be u
9.54 Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below. The firm examined 35 randomly chosen fax transmis
Using Probability Distribution 1
Using Probability Distribution in Research Simulation
Using Probability Distribution in Research Simulation University of Phoenix
Using Probability Distribution 2
To: From: CC: Date: Re:
Howard Gray Neil Robins
Here are the numbers of calls received during customer support service: 23, 8, 23, 19, 8, 7, 8, 23. What is the mean of this data set? first we sort the numbers 7, 8, 8, 8, 19, 23, 23, 23.
-minute time intervals at a
The mean is the arith
Suppose that A and B are independent events such that P (A) = 0.20 and P( B ) = 0.50 Find P ( A B ) and P( A A B ) . if P( B ) = 0.50 P(B)=1-P( B )=1-0.5=0.5
P( A B ) = P ( A) P ( B) = 0.2 0.5 = 0.1 P ( A B ) = P ( A) + P ( B ) P( A B ) = 0.2 + 0.5 0.1 =
A survey showed that 24% of college students read newspapers on a regular basis and that 82% of college students regularly watch the news on TV. The survey also showed that 20% of college students both follow TV news regularly and read newspapers regularl
The following list contains the average annual total returns (in percentage points) for mutual funds. The mutual funds appear in an online brokerage firm's "all-star" list. -6, -2, -2, 1, 4, 7, 9, 9, 11,12,13,14,15,18,19, 22, 24, 24, 26, 28, 33, 34, 38.
The tourist bureau of the Caribbean Islands surveyed a sample of 6 United States tourists as they left to return home. The tourists were asked how many days they spent on their visits. Their responses were as follows: 9, 7, 12, 4, 8, 8. Find the standard
Based on your skew value and histogram, discuss the best measures of central tendency and dispersion of your data. Justify your selections. There are three measures of central tendency used in statistics: the mean, the median, and the mode. Each have thei