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An Automatic filling machine at a ketchup manufacturer fills (by weight) 16 oz bottles of ketchup that vary according to a symmetric, bell-shaped curve with a mean of 16 oz and a standard deviation 1oz. What proportion of bottles have weights greater than 19 oz? Suppose your data is approximately normally distributed with a mean 25 and standard deviation 15. What is the approximate 97.5th percentile of your data?
A market researcher wants to find the 99% Confidence Interval for the average number of hours people spend online each day.
Critically discuss the purpose of developing a frequency distribution? What is the relationship between the relative frequency and the cumulative frequency? Could a frequency distribution contain qualitative data? Why?
Prepare an analysis of your selected article. Start by identifying and summarizing the hypothesis described in the article. Then explain whether the hypothesis was rejected or accepted,
A 'good' correlation is data-context driven. For example, I did a project correlating sales volume per state and customer demographics (pretty 'hard' data) and got a .92 correlation.
The mean salary, do you think introducing Michael Jordan's last annual salary of more than $30 million would skew this distribution?
Compute mean absolute percentage error (MAPE) of the forecasts.
In a class roster of 18 students, what are the chances that there are at least 2 people with the same birthday (same day, not same year)?
By using the fact that Martha believes the treatment will decrease the amount of time to fall asleep, describe the null and alternate hypotheses.
In a random sample of 16 mountain climbers who are going to attempt Mt. McKinley what is the probability of each of the following All 16 reach the summit.
Given the following situation, how would you use Megastat to test whether the population defective rate is greater than 5%? Please outline the process for the test and, if necessary, including the output from Megastat to explain your approach.
What is the critical value at .1 significance? Can we conclude the mean lifetime of light bulbs made by this manufacturer differs from 48 months?
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots
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