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1. The weight of medium-sized oranges selected at random from a large bin of oranges at the local supermarket is a random variable with mean µ = 12 ounces and standard deviation σ = 1.2 ounces. The weight of the oranges, in pounds (1 pound = 16 ounces) is a random variable with standard deviation
A. 0.075 pounds.B. 0.005625 pounds.C. 19.2 pounds.
2. A Psychology instructor asked the 100 females in her class to rate their intelligence on a scale of 1 to 10. Some of the ratings were
What proportion of the students rated their intelligence less than 5?A. 6B. 0C. 0.94
Suppose the amount of minutes used per month is distributed normally with a mean of 700 minutes and a standard deviation of 120 minutes. What is the probability that more than 820 minutes were used?
Let X denote number of students which were on bus carrying this arbitarily selected student. One of the 4 bus drivers is also arbitarily selected. Calculate expectations and variances of X.
In a simple random sample of 1000 households, 150 households happen to own a barbecue grill. Based on the characteristics of the population, the expected number of grill owners in the sample was 180.
State the largest possible domain for the definition of the function. f(x,y) = cube-root(y^2-x)
If the supermarket begins each morning with a stock of 61 cartons of eggs, approximately what percentage of days will there be a surplus of eggs?
Create a 95% confidence interval for the population mean days absent for sickness based on this sample. Select the answer closest to your results.
Probability of 0.3, and is a draw with probability of 0.3, independently of the previous games. What is the probability that Fischer wins the match?
Suppose for a particular set of data r = 0.889, ybar = 5.5, n = 15 and the equation for the regression line is yhat = 3.5 + 2.5x. Find the best-predicted value of y given that x = 2.0.
In a sample of 200 women, 144 of them said they were in debt. Test the claim that women are in deeper debt than men, at a=0.01.
An article in Annals of Mathematical Statistics reports the following data on the number of borers in each of 120 groups of borers. Does the Poisson pmf provide a plausible model for the distribution of the number of borers in a group?
The weight of a small Starbucks coffee is a normally distributed random variable with a mean of 370 grams and a standard deviation of 15 grams. Find the weight that corresponds to each event:
Election poll reported that applicant had n approval rating 31% with margin of error E of 4%. Create a confidence interval for proportion of adults who approved of applicant.
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