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A set of test scores is normally distributed with a mean of 100 and a standard deviation of 15. If cases are drawn randomly from this distribution, calculate the probabiility of drawing one score between 94 and 106.
It is reported in USA Today that the average flight cost nationwide is $342.59. You have never paid close to that amount and you want to perform a hypothesis test that the true average is actually less than $342.59. What are the appropriate hypoth..
consider the experiment of rolling a pair of dice. suppose that we are interested in the sum of the face values showing
below are five questions that might be found on questionnaires. comment on each as to whether it is a good question
Develop a 99% confidence interval for the population proportion.
A hospital human resources manager finds that the local average starting salary for nurses is $24,000. She randomly samples 10 nurse's salaries at the hospital and calculates a mean of $23,450 and a standard deviation of $400.
Two pediatricians want to investigate a new laboratory test that identifies streptococcal infections. Dr. J uses the standard culture test, which has a sensitivity of 90% and a specificity of 96%. Dr. M uses the new test, which is 96% sensitive an..
Employ the table of standard normal probabilities (z table) to answer the following questions.
At the 0.01 level, is the bank loan financially sound (should the bank ask for additional collateral)? What is the decision rule?
Nursing program gives a qualifying exam to students applying for admission. The grades on the exam have a mean score of 80 with a standard deviation of 6. Describe the distribution of grades.
1.a recent study investigated the extent to which hypertension is affected by alcohol consumption. among other things
Suppose 70% of kids who visit a doctor have a fever, and 25% of kids witha fever have sore throats. What's the probability that a kid who goes to the doctor has a fever and a sore throat?
The director of golf for the Links Group wishes to study the number of rounds of golf played by members on weekdays. At the .05 significance level, is there a difference in the number of rounds played by day of the week?
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