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Researchers have determined that patients who are smokers have 18% chance of contracting a serious illness, whereas only .06 probability that a non smoker will contract a serious illness.
23% are all smokers77% non smokers
What is the probability that a given patient if the patient has a serious illness?
Describe a simulation to estimate the probability of answering at least four of the ten questions correctly. carry out three repititons. estimate the probability
From this small sample, the mean heart rate is 90 beats per minute with a standard deviation of 5. Find a 98% confidence interval for the true mean heart rate of all people with this untreated condition.
The average public elementary school has 450 students. assume the stand deviation of the distribution is 99. if a random sample of 36 public elementary schools is selected, find the probability that the number of students enrolled is between 445 a..
Using the data for women, complete an analysis of CHD incidence in women similar to the one completed for men.
The following frequency table lists the sales of an item and the number of times it has occurred. It was obtained from historical records.
What is the average time that catalog customers must wait before their calls are transferred to the order clerk? (b) What is the average number of callers waiting to place an order?
Survey of 16 tax returns reports families with incomes between $75,000 and 100,000 have on average $8,562 in Standard Deductions with the standard deviation of $1,800.
Based on this data can the college conclude that the students in the new program performed better than the rest of the class> A one-tailed test is used equalling .05
State the hypotheses for a right-tailed test.
A new business with 125 employees is moving into the area. what is the probability that the new employees will consume more than 240 cups of coffee per day.
What is the idea of "least squares"? What is the connection between "least squares" and linear regression?
Compute the population mean, the population median, the population midrange, the population range, the population variance, the population standard deviation, and the population proportion of odd numbers. Verify the following results:
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