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An analyst from an energy research institute in California wishes to precisely estimate a 99% confidence interval of the average price of unleaded gasoline in the state. In particular, she does not want the sample mean to deviate from the population mean by more than $0.06. What is the minimum number of gas stations that she should include in her sample if she uses the standard deviation estimate of $0.32, as reported in the popular press?
A random sample of 160 car crashes are selected and categorized by age. The are listed below. The age distribution of for the given categories is 18% for under 26, 39% for 26-45, 31% for 46-65, and 12% for over 65.
1.a manufacturer of infant formula is running an experiment using the standard control formula and two new formulas a
a sample of n 25 individuals is selected from a population with fx 80 and a treatment is administered to the sample.
a survery found that womens heights are normally distributed with mean of 62.1 and standard deviation of 2.3 in. the
Can you please give one example of a Qualitative data and one example of a Quantitative Data that you face daily? Please explain why it is a Quantitative or Qualitative data and describe the scale of measurement.
In a particular region of Cape Cod, it is known that lobstermen trap on average of 32 pounds of lobster per day with a standard deviation of four pounds.
Predict the final average of a student who made an 83 on the first test. Give the value of r and r squared for this model. Interpret the value of r squared in the context of this problem.
Please show work and provide excel formulas for plots so that I can understand how to do the assignment. The density function of a continuous random variable X, the total number of hours, in units of 100 hours, that a family runs a vacuum cleaner ove..
A linear correlation coefficient very close to 0 implies that there is a linear correlation between the averages, but a correlation between the averages does not imply a correlation between individuals as the conclusion incorrectly suggest.
A random sample of 24 patients found a standard deviation of 520. Assume the variable is normally distributed and = 0.01. What are the critical values?
The length of human pergnancies is aprox normally distibuted with a mean of 266 days and a standard devation of 16 days what is the probability the pregancy will last between 160 and 255 days?
Round the intermediate values to 2 decimal places. Round your answer to 2 decimal places, the tolerance is +/-0.05. Type of music preferred is independent or not independent of region of the country?
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