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Students who have completed a speed reading course have reading speeds that are normally distributed with a mean of 950 words per minute and a standard deviation equal to 220 words per minute. if two students were selected at random, what is the probability that they would both read at less than 400 words per minute?
Discuss an element of drinking water where you see a public health gap or need that should be addressed. You may bring up a specific case relevant to your community if you have one, or bring up a global issue.
Determine sample size requirements. When the results are available you would like your margin of error to be plus or minus 5% for the satisfaction measure and plus or minus $1.50 for the spending value.
Chocolate bars produced by a certain machine are labeled with 8 oz. The distribution of the actual weights of these chocolate bars is Normal with a mean of 8.1 oz and a standard deviation of 0.1 oz. What proportion of chocolate bars weighs less th..
To test whether the population mean is less than a specified value.
The first unit required 9800 hours to manufacture. The company expects to experience an 82% unit learning curve. Estimate the cost of the 20th unit. (Round intermediate calculations to 4 decimal places)
What is dispersion? Briefly name five measures of dispersion. Describe the characteristics of the standard deviation. Explain
Find the critical value to test the claim that all ages have purchase rates proportional to their driving rates.
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop. (b) Check the normality assumption. (c) Try the Very Quick Rule.
Discovering that 12 will return to summer school. Construct a 90% confidence interval estimate for the fraction of current spring students who will return to summer school.
Suppose there was 2,500 cards in the inventory and how would the results be useful to the owner to estimate the total value of the inventory. What equation is best?
Using the .01 level, what should the researcher conclude? Solve this problem explicitly using all five steps of hypothesis testing, and illustrate your answer with a sketch showing the comparison distribution, the cutoff (or cutoffs), and the scor..
Use this information to determine the empirical probability that the next bird to visit the feeding station will be a dove.
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