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Out of 87 observations, 67% were successes. Ho: p = 0.54. Confidence level: 98%. What is the value of the appropriate test statistic used to test the null hypothesis?
What is the distribution of the case described here? "Mrs. Shop wants to buy three high quality fountain pens at a traditional market when she travels to a foreign country."
In a survey of 3003 adults, 1450 say they have started paying bills online in the last year. Construct a 99% confidence interval for the population proportion. Interpret the results.
A camera manufacturer just shipped a batch of 36 digital cameras to local retailers and seven of the cameras have a defective sensor. Cutler Electronics received eight of these digital cameras. What
The monthly incomes for 12 randomly selected people, each with a bachelor's degree in economics, are shown on the right.
A company that bakes chocolate chip cookies averages 5.2 chocolate chips per cookie. Assume that the number of chocolate chips per cookie follows the Poisson distribution. What is the probability th
According to the Centers for Medicare & Medicaid Services, 16% of nursing homes received five stars in overall ratings in 2011. A random sample of six nursing homes was selected. What is the sta
Assume that the number of customers who arrive at a water ice stand follows the Poisson distribution with an average rate of 6.4 per 30 minutes. What is the probability that exactly five customers w
The professor randomly selects five students to work together on a group project. What is the standard deviation of this probability distribution if selecting a business major is defined as a succes
The probability of low, moderate, and high demand is 30%, 45%, and 25%, respectively. Determine the EMV for the new product.
Prove that the velocity induced region surrounding a doubly infinite vortex sheet of constant strength satisfies the equation of continuity everywhere.
a) what assumptions about the population should we be willing to make if a margin of error is desired b) using 95% confidence , what is the margin of error? c) Using 99% confidence, what is the marg
Accounting procedures allow a business to evaluate their inventory at LIFO (Last In Fi rst Out) or FIFO (First In First Out). A manufacturer evaluated its finished goods inventory (in $ thousands) f
The P-value for testing the hypoteheses, H0: ? = 30 versus HA: ? > 30, is 0.032. Does the 95% confidence interval for ? include the value 30?
A survey from Teenage research Unlimited found that 30% of teenage consumers receive their spending money from part-time jobs. If 5 teenagers are selected at random, find the probability that exactl
Suppose you have a bag of 150 marbles; 52 are all red 23 are all green, 40 are all blue, 9 are red and green, 14 are green and blue and 12 are red and blue. Without looking, you draw one marble from
What is the standardized score of a mean of 230 taken from a sample of 25 from a normal population that has a mean of 211 and standard deviation equal to 46?
The mass of a species of shrew is approximately normally distributed with a mean of 10 grams and a standard deviation of 5 grams, then (no continuity correction)
Find the mean and standard error of the sample means that is normally distributed with a mean of 10 and a standard deviation of 2 and a sample size of 25.
Suppose you were given the task of estimating the proportion of drivers in Troy, AL who text while they drive. Discuss what factors you must consider and how you would accomplish this.
The amounts of soft drink machine is designed to dispense for each drink are normally distributed, with a mean of 11.7 fluid ounces and a standard deviation of 0.3 fluid ounce. A drink is randomly s
The mean gross annual incomes of certified welders are normally distributed with the mean of $20,000 and a standard deviation of $2,000. The ship building association wishes to find out whether thei
Calculate the probability that at least 12 in a sample of 20 first-time buyers would take out no-money-down loans if San Francisco's proportion is the same as the nationwide proportion of no-money-d
Suppose that a population is known to be normally distributed with mean = 2,000 and standard deviation = 230. If a random sample of size n = 8 is selected, calculate the probability that the sample