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A random sample of 33 adult men had a mean weight of 182.5 pounds and a standard deviation of 22.5 pounds. Find a 99% confidence interval for the mean weight of adult men.
An investment project is expected to earn $100,000 on average with standard deviation of $50,000. Assume earnings from this investment project is a normal distribution.
A pipe is normally distributed, with mean length 25 in, standard deviation 0.06 in. Four are joined and fitted into a slot. The slots are normally distributed, with length 100.25 in, and standard de
Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the unpopped kernel
The following 99% confidence interval was obtained for the difference between the mean amount of time spent watching television for women and the mean amount of time spent watching television for m
What is your prior probability that next visitor to the Web site will be female?
A local drugstore owner knows that, on average, 100 people per hour stop by his store. Find the probability that in a given 3 minute period, more than 5 (P(x > 5) people enter the store.
A study was performed in Basel, Switzerland, on the relationship between the concentration of plasma antioxidant vitamins and cancer risk. Table shows data for plasma vitamin-A concentration for sto
There are 4000 mangoes in the shipment. It is found that it has mean weight of 15 ounces with the standard deviation of 2 ounces. Determine the probability that a randomly selected mango weighs less
There are 4000 mangoes in a shipment. It is found that it has a mean weight of 15 ounces with a standard deviation of 2 ounces.
An investment project is expected to earn $100,000 on average with standard deviation of $50,000. Suppose earnings from this investment project is a normal distribution. Determine the probability th
What is the probability that they will BOTH go to the gym after work on the same day? What is the probability that ONE of them will go to the gym after work?
A company has designed the new braking system for electric powered automobiles. To determine the lifetime of the system, the design engineers place the braking system on 50 electric powered cars as
Find out the probability that there are enough seats for all the passengers who show up. (Hint: Find the probability that in 12 people, 10 or less show up.)
Water samples from the particular site demonstrate mean coliform level of 10 organisms per liter with standard deviation 2. Values vary according to the Normal distribution. What percentage of sampl
At the 0.05 significance level, is there sufficient evidence to support claim that proportion of women favoring stricter gun control is higher than the proportion of men favoring stricter gun contro
A researcher predicts that the listening to music while solving math problems will make a specific brain area more active. To test this, a research participant has her brain scanned while listening
Find out the probability that there are enough seats for all the passengers who show up. (consider the probability that in 12 people, 10 or less show up.)
Determine the probability that a randomly selected tire lasts longer than 38,100 miles? How many tires in your shipment do you expect to last between 27,500 and 33,800 miles? Find out the 94th percent
Which employee has the best perceptual-motor coordination? Be sure to explain the calculations you used in determining the answer?
The car theft rate in City of Cleveland is displayed in column two for recent years. And x column represents the number of arrests for car theft find out the correlation between arrests and the rate
A machine fills bags of sugar and random sample of 20 bags selected from week's production yielded a mean weight of 499.1g with std deviation 0.63g.
An inspector working for the manufacturing company has a 99o/o chance of correctly determining defective items and a 0.50% chance of incorrectly classifying a good item as defective. The company has
Find out the probability that there are enough seats for all the passengers who show up. (consider probability that in 12 people, 10 or less show up.)
Determine the test statistic? Give your answer to four decimal places. Determine the P-value for the test? Give your answer to four decimal places.