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The standard deviation of the weights of elephants is known to be approximately 15 pounds. We wish to construct a 95% confidence interval for the mean weight of newborn elephant calves. Fifty newborn elephants are weighed. The sample mean is 244 pounds. The sample standard deviation is 11 pounds. Construct a 95% confidence interval for the population mean weight of newborn elephants.
State the confidence interval, sketch the graph, and calculate the error bound.
Statistics from Cornell's Northeast Regional Climate Center indicate that Ithaca, NY, gets an average of 35.4" of rain each year with a standard deviation of 4.2". Assume the data is normally distributed.
Calculate this seasonal adjustment index if i have 14 periods instead of 16 periods needed?
1 labforensic collection and analysis of persistent datawrite up your lab experience including the necessary steps
What was the total number of participants surveyed for the study and what was the total number of participants who completed the entire survey?
Using Data/Filter and Sort make a subset of the main data table for Symbol HPQ (Hewlett Packard) for the year 2000. Make a line chart of the closing prices for the year 2000 from Jan through Dec.
Your readings this week have provided you with an overview of various types of research methodologies falling under Quantitative, Qualitative and Mixed Methodology research
1)What is the number of Observations in the sample? Write the least squares regression (prediction) equation. Test the usefulness of variable x2 in the model at alpha =.05. Calculate the t statistic and state your conclusions
What percentage of the area of the standard normal distribution is between z = -2.00 and z = +2.00? How do you know this?
Complete the analysis of variance. At a .05 level of significance, is there a significant difference between the treatments?
To test the hypothesis that there is no association between use of postmenopausal hormones and risk of MI, chi-square statistics need to be calculated.
An interior designer makes a presentation to potential clients and this results in sales of her services in 35% of the cases. Let X denote the number of sales in the next four presentations. Assuming the results for different clients are indep..
Find the indicated probabilities using Poisson distribution. Then determine if the events are unusual. A newspaper finds that the mean of typo error is five. Find the probability that a) exactly for errors found on a page, b)at most for errors ..
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