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From past experience, a server at a restaurant knows that her tips follow a right-skewed distribution with mean $6 and standard deviation $4.
What is the probability that the servers next 30 tips have a mean between $6 and $7? (Assume that these 30 customers represent a simple random sample).
If the server has 40 customers in one shift, what is the probability that her total tips are less than $250? (Assume that these 40 customers represent a simple random sample).
Utilizing form of Regression method which would give you highest performing model to forecast Sales. Utilizing your model forecast the sales
Use the given confidence level and sample data to find a confidence interval for estimating the population mean
A month of sales data are collected on sales of different types of computer products Run the t-tests to determine:
Sketch the distribution of sample means for sample of n = 25 scores from this population.
The average stock price for companies making up the S&P 500 is $40, and the standard deviation is $10. Assume the stock prices are normally distributed. What is the probability a company will have a stock price less than $33.
State the decision rule for .05 significance level. (Round your answer to 3 decimal places.)
The average monthly gasoline purchase for a family with 2 cars is 90 gallons. This statistic has a normal distribution with a standard deviation of 10 gallons. A family is chosen at random.
To find the probabilities values of standard normal variable
Determine estimated average starting salary for school with average GMAT of 600 points?
At 95% confidence, test to determine if more than 21% of the population will like the new soft drink.
What is the probability that a randomly selected automobile manufactured by the company will have a defective microprocessor?
Use a 0.05 significance level to test the claim of a cereal lobbyist that the mean for all cereals is less than 0.3g.
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