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The wiehgt of a corn chips dispensed into 16-ounce bag b6 dispending machine has been identified as possessing a normal distrution with a mena of 16.5 ounces and a standred deviation of 0.02. suppose 400 bags of chips are randomly selected. Find the probability that the mean wieght of these 400 bags exceeds 16.6 ounces.
A company requires its secretarial employees to demonstrate his/her ability to type more than 45 words per minute in a typing test.
A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence level to find the population proportion.
Find the percent of a standard Normal model found in the given region. Round to the nearest hundredth of a percent.
The registrar of a college with a population of N=4,000 full-time students is asked by the president to conduct a survey to measure satisfaction with the quality of life on campus.
Fit a linear regression model for bp against sodium. Do you think this is a model with a good fit? Why?
If two randoom samples of sizes n1 = 30 and n2 = 36 are selected independently from two populations with mean 78 and 85, and with standard deviations 12 and 15, respectively, then the standard error of the difference between Xbar1 and Xbar2 are eq..
At the .01 significance level can we (she) conclude that the true average daily amount of tips is greater than $80? yes or no.....
You want to determine whether or not an observational coding system you've created for ADHD is better as a system with 5 behavioral scales or 3 behavioral scales. What test should be run?
Three coins are tossed simultaneously, consider the event E "Three heads or three tails" F " At least two heads" and G "Atmost two heads " of the pairs (E,F), (E,G) and (F,G), which are independent? Which are dependent?
Nationwide, GMAT scores in a particular year had an average of 528 with an SD of 112 and the scores roughly followed a normal curve. If a student scored 600 on the exam, approximately what percentage of test-takers scored below this student?
The average cost of repairing a VCR is $80 with a standard deviation of 19. if one VCR is repaired, find the probability the cost is between 70 and 90.
The percentage 'y' of impurities per batch in a certain chemical product is a beta random variable with probability density
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