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In order to conduct a survey of the US Senate, each senator is assigned a number from 1 to 100 and a computer is then used to randomly select 15 numbers. What type of sampling technique was used?
a) stratified
b) simple random
c) cluster
d) systematic
Each time that Ed charges his credit card, he omits the cents and records only the dollar value. If this month he has charged his credit card 20 times what can be said about the probability that the record shows at least $15 less than the actual a..
Find the z-scores that bound the middle 15% of the standard normal distribution. (Give your answers correct to two decimal places.
The article should include a margin of error and confidence interval. Discuss the subject matter in the article, and interpret the results and what the confidence interval and margin of error mean as they apply to the specific subject matter.
twelve plots of land are divided randomly into 3 groups. fertilizers a b and c are applied to the three groups
Suppose the sample variance for 30 parts turns out to be s 2 = .0005. Use α = .05 to test whether the population variance specification is being violated.
A standard deviation of 14 inches. What is the probability that the mean annual snowfall during 49 randomly picked years will exceed 96.8 inches?
Consider this joint probability distribution P: Determine whether P constitutes a Bayesian network with the DAG X -> Y -> Z:
In calculating the UCR rape rates in New York City, which of the following would appear to be the best data for the denominator?
q1. the probability that an individual egg in a carton of eggs is cracked is 0.03. you havepicked out a carton of 1
Determine the confidence interval for population mean and the Superintendent wants to determine the average amount of hours per week the student population studies at home.
Test whether there is any change in IQ after the training program (The absolute value of 1 for 4 degrees of freedom at 1% level for one-tailed and two tailed tests are 3.747 and 4.604 respectively)
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
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