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1. What is a discrete probability distribution? Explain in your own words.
2. What conditions must be satisfied by the probabilities in a discrete probability distribution? Explain what these conditions mean.
3. Describe how to compute the mean (or expected value) of a discrete random variable, and interpret what this quantity tells us about the observed values of the random variable.
4. Describe how to compute the standard deviation of a discrete random variable, and interpret what this quantity tells us about the observed values of the random variable.
Do a project in data mining with R - statistic and Economics but the project can be not only Economics argument.
If we prepare a data set for exercise #9 of chapter 14 (question 3 of this homework), we can use SAS to answer all the questions in parts a), b), c) and d) of this exercise. The sample size (n) for this exercise was 45 and of these 45 third-graders 4..
Calculate correlations among the portfolio, SH, and RWM and do you believe the relationships identified are stable and can thus be used going forward?
Interpret the data and note the shape of the distribution of the data provided from the case study: Highest paid women...include frequency table, stem and leaf plot, histogram, sample mean and median, and sample standard deviation.
Find the probability that 3 or 4 of the batches will be rejected in the next shift and find the expected number and the standard deviation of batches rejected.
Compute the expected time until the 100 th student arrives. What is the probability that the time between the arrival of the 200th and the 201st student exceeds 2 days?
Find the area under the standard normal distribution curve between z=0.24 and z=-1.12. explain how
Why does a p-value provide a true measure of statistical significance? Try to relate your answer to previously covered concepts - example continuous probability distributions.
What is the probability that the experiment will find (misleadingly) that the mean score for delayed speaking is at least as large as that for early speaking?
A researcher hypothesizes that people who listen to music via ear buds have greater hearing loss than those in the general population. On a standard hearing test, the mean (μ) is 24.75. Higher values indicate better hearing
(a) The life spans of three randomly selected fruit flies are 34 days, 30 days, and 42 days. Find the z-score that corresponds to each life span. Determine whether any of these life spans are unusual. (b) The life spans of three randomly selected fru..
If we select 7 colleges from a major and then record whether they are of 'School Type' 'Private' or not, is this experiment a binomial one? Why or why not?
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