In A Sample Of 99 Healthy Europeans The Mean Number Of Unique Genes In Gut Bacteria Was 564 Million With A Standard Dev 1 (50.34 KiB) Viewed 23 times
In a sample of 99 healthy Europeans, the mean number of unique genes in gut bacteria was 564 million with a standard deviation of 122 million. Suppose we want to conduct a similar study for healthy US adults. If we wish to construct a 95% confidence interval with a margin of error of £10 million, what is the minimum number of US adults that should be sampled? Note that you may assume that the population standard deviation in the US is similar to the sample standard deviation from the European study. Your answer should be an integer. D Question 28 4 pts For the brains of non-autistic male children between the ages of 2 and 16, the typical prefrontal cortex has about 1.15 billion neurons. In a sample of 7 autistic male children in the same age range, their prefrontal cortex had a mean of 1.94 billion neurons with a standard deviation of 0.50 billion neurons. We assume that the values in the sample are approximately bell-shaped. Find the value AND distribution of the test statistic for testing Ho = 1.15 vs H. : > 1.15 using the Central Limit Theorem, where he is the mean number of neurons (in billions) in the prefrontal cortex of autistic male children. Test statistic: [Select) Distribution: [Select)
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= 1.15 vs H. : > 1.15 using the Central Limit Theorem, where he is the mean number of neurons (in billions) in the prefrontal cortex of autistic male children. Test statistic: [Select) Distribution: [Select)