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Health studies indicate that 5 percent of the population of Umen has a disease that is peculiar to that country. There is a diagnostic technique to detect the disease, but it is not very accurate. Historical evidence shows that if a person actually has the disease, the probability that the test will indicate the presence of the disease is .90. if the person does not have the disease, the probability that the test will still indicate that the disease is present is .
We randomly select a person from Umen and perform the test. The test results indicate that the disease is present. What is the probability that the person actually has the disease?A) .90B) .0450C) .1875D) .24
The distribution of IQ scores is normal, what proportion of the population would score higher than Bob? Lower than Bob?
Using a .05 level of significance, test whether the sample results indicate that the manufacturing process is functioning properly.
According to the historical data, the life expectancy in the United States is equal to the life expectancy in Japan. A new study has been made to see whether this has changed.
Make a decision – For the purpose of this discussion, you will make a conclusion based on the hypothetical results from Step 4. Be sure to include a recommendation on the effectiveness of the new drug based on the results.
a sample of data on daily prices of three petrol stations over a two week period have been collected in the table
What is the probability of randomly selecting a male from this group?
At the .05 significance level, can we conclude that the guideline is still reasonable?
1. in this exercise we will be building regression models for predicting house prices. we will be using data collected
Construct a bar and pie chart to graphically display these data by using Microsoft excel.
Below is the number of new cars sold at Sharkey in the last seven months and for the last eight months at Dave White. Do you agree with Mr. Sharkey? Use the .01 significance level."
Time spent using email per session is normally distributed with μ = 8 minutes and σ = 2 minutes. a) What is the probability that the sample mean is between 7.8 and 8.2 minutes?
The area under a normal curve is always equal to 1, no matter what the mean and standard deviation are.
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