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Contracts. Your company bids for two contracts. You believe the probability you get contract #1 is 0.8. If you get contract #1, the probability you also get contract #2 will be 0.2, and if you do not get #1, the probability you get #2 will be 0.3.
a) Are the two contracts independent? Explain.
b) Find the probability you get both contracts.
c) Find the probability you get no contract.
d) Let X be the number of contracts you get. Find the probability model for X.
e) Find the expected value and standard deviation of X.
A poll of 1,200 voters asked what the most significant issue was in the upcoming election. Sixty-five percent answered the economy.
Identify the sampling distribution to be used: the standard normal distribution or the Student's t distribution. Find the critical value(s).
if you sample 100 people and 20 turn out to be over 65 inches tall, you get $20. Which is better: a sample of size 100 or a sample of size 1,000? Choose one and explain. Does the law of averages relate to the answer you give?
which of the sets in the diagram below are independent?why or why not?(be sure you get all pairs of sets)
find the P-value associated with each of the given below values of the test statistic. (Give the answers to four decimal places.) (a) z = 1.20
The scores on an exam are normally distributed with mean 74 and standard deviation 9 points. What is the probability a random student scored.
What is the amount of the first part of the investment? $____ What is the amount of the second part of theinvestment? $____ What is the amount of the third part of the investment? $_____
Is there any evidence that the population proportion of stations in noncompliance with the law is different near Los Angeles and near San Francisco? Use a = 0.01.
question the playing times of songs are normally distributed. listed below are the playing times in seconds of 10 songs
1. Use Tchebysheff's Theorem to make a statement about the percentage of colleges that have between 145 and 205 teachers. 2. Assume that the distribution is bell shaped. What fraction of the colleges have more that 190 teachers.
To investigate differences between resting pulse rate for smokers and non-smokers, calculate summary statistics for resting pulse for smokers and non-smokers and produce boxplots for resting pulse for smokers and non-smokers. Comment on these stat..
Do a feasibility study to assess the likelihood of the project being completed and producing useful results. If possible, the feasibility study should contain some preliminary results (e.g. a pilot data set and initial data analysis).
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