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The finishing time for cyclists in a race are normally distributed with a population standard deviation of 11 minutes and an unknown population mean. If a random sample of 22 cyclists is taken and results in a sample mean of 135 minutes, find a 98% confidence interval for the population mean.
We are studying a system that is undergoing diffusive interactions at constant pressure and temperature.
1 suppose we want to determine the binomial probabilityp of getting 4 heads in 15 flips of a 2-sided coin.nbsp using
Explain how the marketing analyst can use independent samples to collect the data.
At the 0.05 level of? significance, is there evidence that the proportion of female in this position at this medical center is different from what would
a study found that the average time it took a person to find a new job was 3.5 months. if a sample of 30 job seekers
The main objective of the study is to combine an integrated understanding about education in four different areas such as Age, Sex, Marital Status, and Parental Education.
Create a histogram for these ages.- Create a stem-and-leaf plot for these ages.- Create a dotplot for these ages.
a survey of 25 randomly selected customers found the ages shown in years. 28 36 40 26 33 24 11 47 23 33 46 38 35 14 33
What statistic (mean, median or mode) would you use to describe each aspect of the "typical" home? For example, you might use the MEAN for price, the MEDIAN for square footage.
Given that this sample is extremely large, can the responses be considered to be representative of the population of the United States? Explain.
Which response can be used for both threats and opportunities?
Given the nature of the population distribution, would we expect the distribution of sample means to be at least approximately normally distributed? Generate a histogram of the sample means and comment on the shape of the distribution.
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