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If the probability that a tourist visiting the Grand Canyon will be bitten by a rattlesnake is .00002, us the Poisson distribution to approximate the probability that at least 2 of 75,000 tourists will be bitten. (Hint: the mean of the Poisson random variable used to approximate the probability is the mean of the actual random variable.)
A mean of 22 miles-per-gallon and a standard deviation of 5 miles-per-gallon. What is the probability that a car will get less than 21 miles-per-gallon.
You then sort by random numbers in ascending order. Finally, you take the first 50 sorted employees as your sample. Does this approach constitute a statistical or a nonstatistical sample?
A market survey was conducted to estimate the proportion of homemakers who would recognize the brand name of a cleanser based on the shape and color of the container. Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name.
What are the values for the Mean Square Treatment (MST) and the Mean Square Error (MSE)? Compute the value of F. Do you Reject or Fail to Reject the Null Hypothesis? State you conclusion.
1000 students took a national aptitude test. as a result the mean score was 71 and standard deviation was 6. assuming
a sample of 36 receipts at the theater concession stand has a mean total of 18.927 with a standard deviation of 3.883.
Identify and briefly discuss two important concepts ( Prediction and Regression/ Correlation or Regression) applicable to analytical methodology.
British scientists have developed a 15 minute brain scan they hope could be used to detect autism in children. Autism and related disorders affect up to 7 out of every 1000 individuals.
Samples of size 49 are taken from a population with a σ of 17. If the mean of the sample is 25, what is the confidence interval at the 90% confidence level
Show that there is no rational number b/a whose square is 2, as follows: if b^2 = 2a^2, then b is even, so b = 2c, so, substituting and cancelling 2, 2c^2 = a^2.
With a normal distribution of 50 and standard deviation of population =10, how do I figure out the score at the 40th percentile? How do figure out the % of scores falling above 70? How do figure out between what scores do the middle 50 percent of cas..
Compare the margin of error for the interval estimates in parts (a), (b), and (c). The margin of error (Increases or Decreases) as p-bar gets smaller.
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