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A random sample of n = 49 scores is selected from a normal population with a mean of μ = 80. After a treatment is administered to the individuals in the sample the sample mean is found to be M = 75. If the population standard deviation is σ = 30, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a one-tailed test with α = 0.05. Can you show me how it is done please?
For this assignment, you will examine the use of qualitative data for a business scenario.
A student decided that this is a binomial distribution problem. The student found that the probability of all four engines failing is 4.1E-09. Is that answer correct?
Use the given confidence level and sample data to find a confidence interval for estimating the population mean
Normally distributed with the mean income of $30,000 and standard deviation of $3,000. Determine the income which separates top 25% from lower 75% of incomes?
Now if I am raising 200,000 USD for 20% what is the pre money valuation and what is the post money valuation.
The mean monthly income of the trainees of an engineering firm is $600, with a standard deviation of $100. Find the probability that an individual trainee earns less than $500 per month.
b. If the forecast in May was 42, develop a forecast for December based on exponential smoothing with α = 0.25. c. For the data set below, determine the bias, the mean squared error and the mean absolute deviation.
Train A and Train B are two transportations that people can use to transport from Boston to New York - From above computed results from Train A and Train B, what train should be preferred and why?
Over the past 50 days, the distribution of the number of successful calls made by the assistant is as shown below.- Using the 0.05 level of significance, test the goodness of fit between these data and a Poisson distribution with λ = 1.4.
Heinz Plays Catch-up After Under-Filling Ketchup Containers" is the headline of an article that appeared on CNN.com (November 30, 2000).
(i) List all of the different possible samples, and then find the range in each sample.
There are about 1 × 1044 air molecules in the atmosphere and about 2 × 1022 molecules of air in a single breath taken at rest. What is the probability that the breath that you took just now contained at least one molecule of air that was exhaled b..
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