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Find the 95% confidence interval for the population mean.
A manufacturer of potato crisps adds prize at a rate of one prize for every 20 packets in a campaign to promote its product. A packet cannot contain more than one prize. If the packets are sold in multi-packs containing six packets, what is the distribution of the number of prizes in a randomly chosen multi-pack?
What reasons for complaints do you think the hotel should focus on if it wants to reduce the number of complaints? Describe.
Let X 1 , X 2 , X 3 , X 4 be a random sample from a Poisson distribution with parameter λ and let Y = X 1 + X 2 + X 3 + X 4 . You decide to test λ = 1.60 versus λ
For an arch chosen at random in Arches National Park, use the preceding information to estimate the probability that the height of the arch poening is:
The password of 52 digit sequence is made. It consists of 0 and 1. How various different possibilities exist for networks password.
What is the probability that the mean weight for a sample of 40 trout exceeds 405.5 grams?
A month of sales data are collected on sales of different types of computer products Run the t-tests to determine:
The times needed to fall asleep are assumed to follow a normal distribution. The results for the two nights for the ten volunteers are shown below:
Test hypothesis that annual incomes of corporate trainers in areas of more than 500,000 are considerably more than those in areas of less than 100,000. Make use of the 5% level of risk.
What is the probability that: The amount requested is $80,000 or more?
would this prove that they are exceeding their goal, using α = 0.025?
Categorize the following as discrete or continuous random variables.
Construct a 95% confidence interval on the population mean for the following sample data set:
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