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If a sample is subdivided into subsamples, a minimal sample size of 30 is necessary for every subsample?
A. true
B. False
Statistics and Probability, Statistics
A community hospital wants to estimate the body mass index (BMI) of its local population. To estimate the BMI with an error of at most 0.5 at a 95% confidence level, what sample size should they use? The standard deviati ...
Last year Galaxy Corp had $350,000 of assets (which is equal to its total invested capital), $475,000 of sales, $30,250 of net income, and a debt-to-capital ratio of 40%. The new CFO believes the firm has excessive fixed ...
The distribution of heights of adult American women is approximately normal with a mean of 64 inches and standard deviation of 2 inches. What percent of women is taller than 68 inches?
The equation used to predict how long a cold will last is y=-1.8 + 0.09x1 + 3.2x2 - 1.9x3, where x1 is person's temperature on the first day, x2 is number of people seen each day, and x3 is the amount of sleep the person ...
The ACME Insurance Company has two types of customers, careful and reckless. A careful customer has an accident during the year with probability 0.01. A reckless customer has an accident during the year with probability ...
A researcher records the following number of birdcalls made during an experimental session with robins: 8.4 0.9 (M SD). Assuming these data are normally distributed, what is the probability that robins made more than 11 ...
An FBI survey shows that about 70% of all property crimes go unsolved. Suppose that in your town 10 such crimes are committed and they are each deemed independent of each other. What is the expected number of crimes that ...
Question: Suppose we wanted to conduct a survey. It is desired that we produce an interval estimate of the population mean that is ±5 from the true population mean with 99% confidence. Based on a historical planning valu ...
A hypothetical population consists of eight individuals ages 13, 15, 17, 21, 22, 23, 26, and 30 years. (Enter your answers to three decimal places.) (a) What is the probability that a person in this population is a teena ...
1. A stock market analyst is able to identify mis-priced stocks by comparing the average price for the last 10 days to the average price for the last 60 days. If this is true, what do you know about the market's efficien ...
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