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Find the minimum sample size required to estimate a population mean m from an underlying normal distribution. Margin of error: 5; confidence level: 95%; σ = 20. Round your answer up to the nearest integer
A paper company is interested in estimating the proportion of trees in a 500-acre forest with diameters exceeding 2 feet. The company selects 25 plots (100 feet by 100 feet) from the forest and utilizes the information from the 25 plots to help..
A study was done on students homework environments in 3 different environments: listening to music, watching television, or at the library. What are the independent and dependent variables? What would the study hypothesis be? The students were random..
Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. Be sure to show that you know the formula and how to plug into it.Also, clearly state the margin..
What proportion of trucks can be expected to travel between 80,000 and 120,000 kilometres in the year and what percentage of trucks can be expected to travel either below 60,000 or above 140,000 kilometres in the year -How many kilometres will be tra..
What percentage of individual forecasts are at or below the 10th percentile of the distribution of forecasts? What percentage are at or above the 10th percentile? Find the 10th percentile of the distribution of individual forecasts.
Identify sample, population, sampling frame (if applicable), and response rate (if applicable). Describe sampling technique (if applicable) or experimental design
Kellogg's cereal company regularly tests its production line to ensure the accuracy of the loading mechanisms. From a population of cereal boxes marked "12 ounces," a random sample of [n=16 boxes] is selected and the contents of each box is weighed.
If a regression line (linear regression line) is said to "fit" the data presented in a scatter plot, what relation is minimized between the observed data, Y, and the predicted output for the regression line?
The television networks often compete on the evening of the day of an election to be the first to identify the winner of the election correctly. One of the techniques often used is the random sampling of voters as they exit the polling booths. Suppos..
6. Bay Area Community College (BACC) has collected data comparing the starting salaries of their graduating students with last names beginning with the letters A through M with those whose last names begin with N through Z. The first category,..
A sample of 150 U.S. adults is composed of 100 women and 50 men. Estimate the standard error of the proportions for the female population
When Susan and Jessica play a card game, susan wins 60% of the time. if they play 9 games, what is the probability that jessica will have won more games than susan?
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