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Assume the body temperature of healthy adults are normally distributed with a mean of 98.20F and a standard deviation of 0.62F. a) If you have a body temperature of 99.00F what is your percentile score? b)Convert 99.00F to a standard score (or a z-score). c)Is a body temperature of 99.00F unusual? Why or Why not? d)fifty adults are randomly selected. What is the likelihood that the mean of their body temperatures is 97.98F or lower?
What sample size is necessary for a study to determine the average cost of a child delivered at a local hospital within the past three months?
A sample of 148 of our statistics students rated their level of admiration for Hilary Rodham Clinton on a scale of 1 to 7. The mean rating was 4.06 and the standard deviation was 1.70.
Its mean is 139 and its standard deviation is 12. Approximately how many terms can you expect to find between the values of 115 and 163?
What is your approach? Also, what about the other components of hypothesis testing such as confidence level?
a) Under what circumstances can z be greater than one? b) Under what circumstances can a probability be greater than one?
Use the trend equation to calculate the points for 2003 and 2005. Plot them on the graph and draw the regression line.
Galvanizing lines that are assumed to operate independently. What is the probability that none of the lines experiences a surface finish problem in 40 hours of operation.
Chicken Delight claims that 90% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 100 orders revealed that 82 were delivered within the promised time.
A. What is the coefficient of determination? B. What is the correlation coefficient? C. What is the sampl mean of Y?
Suppose n = 1000 persons are to be sampled from this population and the sample proportion of married persons (ρ-hat) is to be calculated. What is the mean of the sampling distribution of ρ-hat?
What proportion of sample means would be between 1.31 and 1.33 inches?
Shipment costs are given in table below. Where no cost is provided, shipments are not possible. Where costs are given, shipments are possible in either direction. Sketch network model for this problem.
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