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Nurses wondered if birth weights of babies are going up. They knew that the average birth weight of a baby last year was 7.6 pounds. A random sample of 15 weights of babies at the hospital where the nurses work gave an average birth weight of 7.9 pounds. Nurses felt that the birth weight this year are normally distributed. Which of the following is true about the distribution of sample means?
- Since the sample size is less than 30, the population data cannot be normally distributed. Therefore, the distribution of sample means will not be normall distributed.
- Even though the sample size is less than 30, distribution of sample means will be normal because the population data follow a normal distribution.
- The distribution of sample means will not be normal even though the population data followed a normal distribution because the sample size is less than 30
- The distribution of sample means will be norml regardless of the shape of the data in the population
What parametric test could be used to test for the effect of linoleic acid on SBP? Perform the test in Problem 1, and report a p-value. What nonparametric test could be used to test for the effect of linoleic acid on SBP?
A fair die is rolled until win or loss occurs: For k=1 to 5: if a 6 occurs on the kth roll you win N dollars and game ends; if a number
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If Belson Electronics's new converter produces less than the 110 volts of their old product, they must redesign it. A sample of 303 converters generated a mean of 107.2 volts, with a standard deviation of 47.3 volts. Set Alpha at 5 percent.
How is regression analysis used in forecasting? Provide examples. How may it be used to formulate strategies?
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With probabilities 0.8, 0.1, 0.08 and 0.02 respectively. A particular company offers a $500 deductible policy. If the company wishes its expected profit to be $100, what premium should it charge?
She then uses the mean and standard deviation of these values to estimate the mean value for all parts the operator is making. Construct a 95% confidence interval for the mean value assuming a normal distribution.
a researcher wanted to investigate whether there was a difference in satisfaction ratings in an assisted living
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A record executive is interested in the popularity of her label's newest band, The Standard Deviations. She asks 10 people how many Standard Deviations songs they know.
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