Amount of coffee
The amount of coffee dispensed in a paper cup of a vending machine is normally distributed with a mean of 4.5 oz. and standard deviation of 0.2 oz. What percent of all the paper cups will have more than 4.8 oz of coffee?
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Amoung all auto shops in San Antonio, a claim is made that the mean time needed to rotate the tires on a car is 16 mintues. A study of 20 auto shops revealed a mean time of 17 minutes with a sample standard deviation of 1.5 minutes. Can we conclud
The data below are the ages and systolic blood pressure (measured in millimeters of mercury) of 9 randomly selected adults. Age, x 38 41 45 48 51 53 57 61 65 Pressure, y 116 120 123 131 142 145 148 150 152
Suppose we roll a fair die two times. a. How many different samples are there? b. List each of possible samples. Compute the mean and the standard deviation of sample means and the distribution of population. (Round mean values to 1 decimal place
If you find that the average number of people entering the store each day since Michelle was hired is different from what it was before Michelle was hired, estimate the average number of people entering the store each day since Michelle was hired
A organic food company wants to determine the best process for blanching dark green vegetable material so it can be added to other food products without losing vitamin A. They are examining three different blanching processes to determine which is
The null and alternate hypotheses is: H? : µ = 20; H? : µ > 20- (I think this is correct). Calculate the p-value using t-distribution (exact value): 0.1577 (What I calculated)
The equation of the estimated regression line that relates the response (dependent) y-variable (cash bonus) to the predictor (independent) x-variable (annual pay) is
A machine produces ball bearings is set so that the average diameter is .50 inch. A sample of 10 ball bearings was measured with the results shown here. Assuming that the standard deviation is .05 inch, can we conclude at the 5% significance level
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