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1. What is wrong with the following statements?
a. P(A) = 1.2
b. P(complement of A) = 0.7 given that P(A) = 0.4
c. P(A or B) = 0.8 if P(A) = 0.3 and P(B) = 0.4
d. P(A and B) < 0
3. The following table is a summary of one of the key questions in the employee satisfaction survey for XYZ Limited. If an employee (a male) is randomly selected, answer the questions below:
Do you plan to be with Company one year from now?
Branch Yes No
Downtown 45 5
Uptown 87 9
4. Historically, 40% of visitors to the online store of ABC Limited made a purchase. 35% of the visitors who made a purchase came to the online store through a web search engine. Also, 10% of visitors who did not make a purchase came to the online store through a web search engine. If a visitor comes to the online store through a web search engine, what is the probability that he or she will make a purchase?
type your question here an article in the jornal of statstic education reported the price of diamond of different carat
Draw marbles from a bag which contains 5 red marbles, 6 blue marbles and 4 green marbles with replacement until you get a blue marble.
How large a sample should be taken in this case so that the margin of error is within .05 of the population proportion for a 90% confidence interval?
North Manufacturing has a demand for 1,000 pumps each year
a simple random sample of size n40 is drawn from a population. the sample mean is found to be x with the line above it
If the salary and compa mean tests in questions 2 and 3 provide different results about male and female salary equality, which would be more appropriate to use in answering the question about salary equity - how do you interpret the results and what ..
a. How many levels of factor A were used in the study? b. How many levels of factor B were used in the study? c. What are the df values for the F-ratio evaluating the interaction?
The data (percentage of water removed) are shown in the accompanying table. Carry out a complete analysis of the data using an available statistical software package.
Then use the stemplot to describe the distribution of the first-exam scores for this course.
what is the probability that the sample mean of IQ scores will not differ from the population mean by more than 2 points? (Round your answer to four decimal places.)
A multiple-choice examination consists of 90 questions, each having possible choices a, b, c, d, and e. Approximate the probability that a student will get at least 21 answers correct if she randomly guesses at each answer.
Modalities. A survey of athletic trainers (Scott F. Nadler, Michael Prybicien, Gerard A. Malanga, and Dan Sicher).
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