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Over the past few years, banks have strongly promoted online banking and the paying of bills online. In 2003, about 50% of internet users paid bills online. In a recent survey of 250 internet users, 150 said that they pay bills online. At the 5% level of significance, test whether the proportion of internet users paying bills online is now more than 50%.
Build regression models for predicting house prices. We will be using data collected on 91 houses in Gainesville, Florida. The dataset contains the selling price of each house and information on four other explanatory variables.
Let X1,... x30 be independent Poisson random variables having mean 1. (a) Use Chebyshev's inequality to find a lower bound on the probability.
If 900 users visited the site, would the probability that more than 250 of them click on an ad be higher or lower than the answer found in part
Find the test statistic P-value, and critical value, and state the final conclusion.
Determine the largest plausible average balance for the accounts of those using her managed fund in which you could have 90% confidence.
Using the empirical rule what percentage of adults is 25 - 45 has iq score bet 70 and 130.
Promotion occurs on average every 10 days in a large corporation. What is the probability that the next promotion will occur within:
A salesperson makes four calls per day. A sample of 100 days gives the following frequencies of sales volumes.
Determining the probability that the two choose the same number?
In a sample of 1200 police officers, the mean annual salary was $33,000 and the standard deviation was $3200. A random sample of size 70 is drawn from this population. What is the probability that the mean annual salary is between $32,000 and $32,..
What is the probability of at least three hacker attempts during a month? What is the probability of a hacker attempt occurring every 15 days or less (assume a 30 day month).
Discuss the purpose of transforming raw scores into standard scores. Describe what "normal distribution" means. Describe measures of variability and explain how they can help therapist understand assessment data.
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