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A study is run to estimate the mean total cholesterol level in children 2-6 years of age. A sample of 9 participants is selected and their total cholesterol levels are measured as follows.
185 225 240 196 175 180 194 147 223
Generate a 95% confidence interval for the true mean total cholesterol levels in children.
Find the standard error of the difference in sample means,
Sampling distributions. Given a normal distribution with μ = 50 and standard deviation σ = 9, if a sample of n = 100 is selected.
Similar survey of student population 10 years ago found that coffee shop was favoured by 20% of students, and pizza and hamburger were each preferred by 40% of the students. Determine the expected frequencies for chi-square test.
Calculate the probability of a value between 75.0 and 90.Calculate the probability of a value of 75.0 and less.
Suppose that the number of calories in McDonald's Egg McMuffin is normally distributed random variable with mean of 290 calories and standard deviation of 14 calories.
Critically illustrate out the characteristics of a standard normal distribution? Can two distributions with the same mean and different standard distributions be considered normal?
The economists in the Obama administration suggested that the stimulus package that they recommended in early 2008 would keep unemployment under eight percent.
What is the stock's value at it's highest on 15 days of the year? (Assume that there are 240 trading days in a year).
Use the trend equation to calculate the points for 2003 and 2005. Plot them on the graph and draw the regression line.
How many degrees of freedom must researcher use in her t-test critical value supposing that variances are equal?
The Scatter plot can more easily be generated using the Chart procedure.
Students in a statistics class at a large state university were given the survey in which one question asked was age (in years); one student was a retired person, and her age was an "outlier".
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