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Old Faithful Geyser: Time intervals (in minutes) between eruptions of Old faithful geyser in Yellowstone National Park:
98 92 95 87 96 90
65 92 95 93 98 94
Think about a real life situation that follows a linear equation, with the independent variable being years. What would the slope tell you about future years?
give and describe an example of an ordinal measurement
Suppose that we are interested in the proportion of the 70 students in the lunchroom cafeteria that smokes. Is the normal approximation for the proportion p = r/n valid?
A random sample of five observations from the first sample resulted in a standard deviation of (12). A random sample of seven observations from the second sample gave a standard deviation of (7) at the (.01) significance level.
q1.simulate 100 random normal variables with mean 1.5 and standard deviation 2. create a histogram which shows the data
A random sample of n=64 children of working mothers showed that they were absent from school an average of 5.3 days per term, with a standard deviation of 1.8 days
A geologist has collected 10 specimens of basaltic rock and 10 specimens of granite. The geologist instructs a laboratory assistant to randomly select 15 of the specimens for analysis.
The general social survey is an annual survey given to about 1,500 U.S. adults selected at random. Each year, the survey contains several questions meant to probe the respondents' views of employment.
What is the probability that a home has a garage but not a swimming pool?
Let B be the event that a randomly selected person from this sample is employed. What is P(A|B) (rounded to two decimal places)?
Explain the distribution of mean of samples of size 15.
a sample of 60 students from a large university is taken. the average age in the sample was 22 years with a standard
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