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Every year favorite songs compete to be on a Top 200 list based upon sales and rankings by the experts in the music industry. These songs have many characteristics, such as song length and beats per minute, which vary from category to category in the music industry. A disc jockey wondered if the number of beats per minute in songs classified as dance music were lower than the beats per minute in the songs that are ranked on a Top 200 list from 2001. A random sample of songs from each group was selected and the beats per minute are listed in the chart at the right. Does this sample indicate that songs classified as dance music have lower beats per minute than the songs ranked on a Top 200 list?
Beats per minute: dance songs: 121 122 117 120 120 121 118 120 117 119 121 122 119 119 118 120 123 118. Top 200 songs: 122 121 121 122 121 119 120 119 120 118 121 123 118 120 124
8) Test an appropriate hypothesis and state your conclusion.9) Create and interpret a 90% confidence interval.
A tray of electronic components contains 20 components, 4 of which are defective. If 4 components are selected, what is the possibility of each of the following? (Round your answers to five decimal places.)
Determine the least squares regression line
Use the Poisson model to approximate the probability. Round your answer to four decimal places.
Probability. A grab bag contains 10 $1 prizes, 7 $5 prizes, and 5 $20 prizes. Three prizes are chosen at random. Find the following probabilities.
Supppose a baseball is thrown at 85 miles per hour.The ball will travel 320 ft when hit by a bat swung at 50 miles per hour and will travel 440 ft when hit by a bat swung at 80 miles per hour.
A loan of $9,800 is to be repaid with monthly payments for 12 years at 3.2% interest compounded monthly. Calculate the monthly payment.
A surfboard manufacturing company has determined that the cost function c(x), in hundreds of dollars, for producing x hundreds of boards is c(x) = .2x^2 -.84x + 3.625.
Use Newton's method to find the coordinates of the inflection point of the curve y = ecos(x),0 ≤ x ≤ π , correct to six decimal places.
A machine produces widgets at a defective rate of 10%. A sample of 5 widgets is taken, What is the probability that less than 2 of them are defective?
Best rentals charges a daily fee plua a mileage fee for renting its cars. Barney was charged $87 for 3 days and 300 miles wheile Mary was charged $154 for 5 days and 600 miles. What does Best Rentals charge per day and per mile?
Task: Apply curve-fitting techniques and interpret the results. As such, your work will include doing scatterplots, determining the equation and graph of the curve on the scatterplot, finding the r^2 value,
Suppose a machine has three independent components with Exp(.1) lifetimes. Compute the expected lifetime of the machine if it needs all three components to function properly
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