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A poll reported that 65% of adults were satisfied with the job the major airlines were doing. Suppose 12 adults are selected at random and the number who are satisfied is recorded. (a)Find the probability that exactly 7 are satisfied with the airlines. (b)Find the probability that fewer than 5 are satisfied with the airlines. (c)Find the probability that 8 or more are satisfied with the airlines.
625 males, 398 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the population proportion.
According to a national survey of 1,500 Silverman Sachs customers, 1,050 of them were either satisfied or very satisfied with their financial advisor.
Assume the standard deviation of the distribution is 2.5 pounds. Find the probability that the mean of a sample of 55 families will be between 17 & 18 pounds.
While exploring data that was collected for an investigation of resources needed for software testing and improvement, you have found an outlier.
If a garage is robbed, what is the probability the doors were left open?
A sample of 84 golfers showed that their average score on a particular golf course was 89.05 with a standard deviation of 3.47.
Mothers did not take the drug DES during pregnancy , what is the estimate of the number of women out of 1000 who would be expected to have tissue abnormalities?
Calculate the sample statistic and standard error you will use to create the test statistic.
The life of a calculator manufactured by Intel corporation has a normal distribution with a mean of 50 months and a standard deviation of one year.
If two of totes don't conform to purity requirements, determine the probability that at least one of nonconforming totes is selected in sample?
Likert scale- based questionnaire & responses for 30 respondents showing the number of respondents for each respond option
Determine the probability that a randomly selected exam will have a score of at least 71? What percentage of exams will have scores between 89 and 92?
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