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According to one survey, the mean serum cholesterol level for U.S. adults was 195.5 , with a standard deviation of 49.5 . A simple random sample of 92 adults is chosen. Find the 60 percentile for the sample mean.
Committee Selection. A committee consists of five executives, three women and two men. Their names are Maria (M), John (J), Susan (S), Will (W), and Holly (H). The committee needs to select a chairperson and a secretary.
If a particle is dropped at time t = 0, physical theory indicates that the relationship between the distance traveled r and the time elapsed t is r = gtk for some positive constants g and k. A transformation to linearity can be obtained by taking l..
A basketball player claims to make 47% of her shots from the field. We want to simulate the player taking sets of 10 shots, assuming that her claim is true.
Same survey showed that average length of time each store was in business in 6 years, with standard deviation of 2.5 years. Which is more variable, number of magazines or number of years?
The scores on a (hypothetical) vocabulary test of a group of 20 year olds and a group of 60 year olds are shown below.
Suppose that the auto loans from a bank are normally distributed with a mean of $20,000 and a standard deviation of 3,100. 10% of loans will be for more
Rodents A scientist is interested in studying the effects that applying pesticide to crops has on the local rodent population.
Draw the graph relating Number of Faults to Line length and does the data indicate that the number of faults per mile has changed from year 2000 to year 2001?
A convex mirror whose focal length is 40 cm has an object 20 cm tall and 100cm away. Find the position, nature and size of the image formed.
Make a scatter diagram for the data, using Sales for the independent variable and Net Profit for the dependent variable. Insert the trend line and add the equation and R2 value to the diagram.
The data below were obtained for the years 1993 through 1998 and indicate the number of fireworks (in millions) used and the related injuries. Predict the number of injuries (provided there is a significant relationship) if 100 million fireworks a..
When people fold their hands together with interlocking fingers, most people are more comfortable with one of two ways.
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