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The playing time X of classical CDs has the normal distribution with a mean of 54 and a standard deviation of 5; the N(54, 5) distribution. What is the relative frequency of classical CDs with a playing time X between 49 and 69 minutes?
Discuss why the standard error for the distribution of sample means is smaller than the standard deviation of sample scores. Distinguish between within-group designs and between-group designs.
According to the patient's history and physical examination. What are the chances of herniation if the MRI is positive?
Using the raw measurement data presented below, calculate the t value for independent groups to determine whether or not there exists a statistically significant difference between the salaries of female and male human resource managers.
The probability Mary will receive an A in a class is 0.70. Assuming independence, if she is taking 5 classes this semester, calculate the probability she will receive exactly 3 A's.
A bus arrives at a bus stop at a uniformly distributed time over the interval 0 to 1 hour. A passenger also arrives at the bus stop at a uniformly distributed time over the interval 0 to 1 hour.
A physician wanted to estimate the mean length of time µ that a patient had to wait to see him after arriving at the office.
From the calculator manufacturer?s point of view, which type of error would be considered more serious and explain why? From the printed circuit supplier?s point of view, which type of error would be considered more serious and explain why?
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 trial failed to show significance. How many subjects would be required to detect the difference in proportions observed in the trial with 80% power?
To compute all the descriptive statistics for the following set of three test scores over the course of a semester. Which test had the highest average score? Which test had the smallest amount of variability?
What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes?
Critically discuss how someone may use measures of central tendency, variation, or position in their home, school, or workplace.
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