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Probability based on a random experiment.
1. The telephone numbers for a region of a state have an area code of 570. The next seven digits represent the local telephone nukbers for that region. A local telephone number cannot begin with a 0 or 1. Your cousin lives within the given area code. What is the probability of not randomly generating your cousin's telephone number?
2. Decide if the events are mutually exclusive.
Event A: Randomly select a person who loves cats.
Event B: Randomly select a person who owns a dog.
A mean of 45 months and a standard deviation of 8 months. if a random sample of 600 batteries is selected, how many batteries would weigh last more than 48 months?
Find the probability that the mean aptitude test score for a randomly selected group of 150 8th graders is between 101.5 and 98.5.
What are some examples of each of the trend types (Secular/Linear)? What external factors might affect each of the different types of trending?
What is the probability that between 5 and 10 firms, inclusively, purchase a Unix machine from Sun Microsystems?
For a random sample of 200 undergraduates he finds that 70 have some kind of allergy. What is the standard error of the sample proportions?
Multiple choice question using Forecasting techniques. Which among of the following models are best suited to forecast a time series with a stable seasonality component.
A sample of 50 bottles reveals a mean weight of 502.1 ml. Construct and interpret a 90% confidence interval for the mean. Be sure to interpret the meaning of this interval.
We are doing a team project for our statistics class and our project is about "Math Anxiety". We are stuck on one question and the questions is "the teams will state the null and alternative hypotheses
The majority of the data is basically distributed if there are enough subjects. For instance, if you collected test scores of only a few honor students, the data will most likely not be normally distributed because you would have a sample that did..
Assume that 20 students registered for the course. Compute the probability that more than three will withdraw (to 4 decimals).
How would I go about finding the probabilities for the following discrete random variables? Among a shipment of 5,000 tires, 1,000 are slightly blemished. If one purchases 10 of these tires, what is the probability that 3 or less (P (x
Explain the terms parameter and statistics. Make sure the concepts of population and sample are included in the definitions.
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