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The weights of adult chipmunks vary according to a normal distribution with standard deviation 1.4 ounces. Researchers suspect that the mean weights of populations of chipmunks depend on where they live. A team of biologists caught, weighed, and released 15 chipmunks in Rocky Mountain National Park, and the mean weight for this sample was 8.2 oz. Which of the following is a 96% confidence interval for the true mean weight of chipmunks in the park? and, Researchers want to estimate the mean weight of all chipmunks living in Albuquerque, NM. Using the population standard deviation of 1.4 ounces, find the sample size required if we want our margin of error to be less than 0.25 ounces with 95% confidence.
Find the value of Proportion and construct a 90% confidence interval for proportion.
A standard deviation of 1.5. The distribution is normal. What proportion of faculty consume an amount between 4 and 6 cups?
From the given probability distribution finite the mean and standard deviation.
Compute the value of the proportion of the population.
You have been retained as a consultant to SarParKingsGraUsch. Your job is to determine if this particular overbooking strategy is sound. Use simulation methods to perform your analysis.
A marketing research analyst collects data for a random sample of 100 customers out of the 400 who purchased a particular "coupon special".
The data is shown on the table. Is there a difference in mean SBP between treatments? Run the appropriate test at α= 0.05
How could your answer to part (A) change if you knew returns followed a skewed distribution instead of a normal distribution? Explain.
The monthly income of residents of Dayton is normally distributed with a mean of $3000 and a standard deviation of $500.
Develop the "best" regression model possible using this set of variables to help you predict the Risk. State your final model. Interpret the coefficients for the model (i.e. what do the numbers mean?).
In a class of 40, 16 driver a car made outside the United States. What is the confidence interval for the total population of students at the 95% level?
One of the three vice-presidents has not been invitged to attend any of the last four games. what is the probability that this could happen?
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