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The weight of each package of a certain brand of rice is normally distributed, and the average weight and standard deviation are 5 kg and 0.15 kg respectively.
a. If a pack of rice of that brand is randomly selected, What is the probability that it weighs more than 5.2 kg?
b. If 25 packs of rice of this brand are randomly selected as samples,
i. Explain which probability distribution the average weight of the sample will obey
(Outline your reason clearly) and calculate its average and also standard deviation.
ii. What is the probability that the average weight of the sample is less than 5.03 kg?
If a person were to use the expected monetary value criterion, what decision would be made?
Production of the three machines one article is selected at random. if it found that this article is defective, what is the probability that it was manufactured by machine X?
According to Money, 60% of men have significant balding by age 50.24 If this finding is based on a random sample of 1,000 men of age 50, give a 95% confidence interval for the population of men of 50 who show some balding.
How large does need to be? In other words, how many time do we need to run the experiment?- find an expression for the average number of times the event is observed.
1 what was the mean quantity ordered?a. 48.0 b. 52.7 c. 10 d. 74.52 what percentage of orders is for quantity
The average cost of a gallon of regular unleaded fuel at gas stations nationwide was $3.23, with a standard deviation of $0.23. Assume the national average holds for Connecticut. What is the probability that a sample of 30 gas stations in Conne..
Find the probability that they will meet if they arrive independently at random times between 5 and 6 P.M.
Nest humidity and fleas. In the setting of Exercise 28.7 (page 28-16), researchers showed that the square root of the number of adult fleas y has a quadratic relationship with the nest humidity index x. Specify the population regression model for ..
a clinical trial tests a method designed to increase the probability of conceiving a girl. in the study 290 babies were
What is the probability that a randomly selected tree will be at least 12 in. in diameter?
The MMR vaccine is a measles-mumps-rubella vaccine. Consider the following quote from the article "Review Finds No Link Between Vaccine and Autism
Set up the competing hypotheses such that rejection of the null hypothesis supports the visitor's belief.
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