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Data collected by a child development scientist produced a 95% confidence interval for the mean age, μ (in weeks) at which babies began to craw as [21.4, 31.6]
a) what is the sample mean.
b) what is the margin of error for the confidence interval.
Devise a method for estimating and plotting Bayesian credible regions for the paramters, using your MCMC sample and compute LS estimators of a and b,
Mean=63.6 Standard deviation=2.5 If 36 data points are arbitrarily chosen, determine the probability that mean is less than 64.
You know that all sociology majors study 2.5 hours per day with a standard deviation of 1.
If the weight distribution is known to be normally distributed, do the data support the veterinarian's suspicion? Conduct a hypothesis test at the 5% significance level. Define your parameter (μ), state your hypotheses, conduct the test and write ..
Examine the behaviour of 99% critical values for these degrees of freedom, and comment on the limits in this case.
The management of a regional bus line thought its cost of gas might be correlated with its passenger/mile ratio. Comment on the data and correlation matrix below.
Supposing a linear relationship, use the least squares method to find the regression coefficients b 0 and b 1 .
The caffeine content of 20 brands of regular coffee is shown below. 80 82 89 85 87 30 33 44 40 46 50 55 60 62 71 90 92 75 63 65. Thus, this job helps to construct a Frequency Distribution with a class interval of 10, starting with 30.
Does drug have significant effect on aggression? Use an alpha level of .05, two tails.
When the purpose of sampling is to detect when a process becomes too variable the chart of choice will be a c-chart?
The probability she must stop at at least one of the last two signals is 0.8. Finally, the probability she must stop at at least one of the first and third Signals is also 0.8.
Testing for population mean - How would this information be useful to you if you were the college register?
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