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How much should a healthy shetland pony weigh? Let X be the age of the ponies in months and y be the average weight of the ponies, in kilograms.
X: 3 6 12 18 24
y: 60 95 140 170 185
A} make a scatter diagram and draw the line you think best fits the data.
B} would you say the correlation is low, moderate or strong? positive or negative?
C} use a calculator to verify Ex=63, Ex^2 = 1089, Ey = 650, Ey^2 = 95,350, and Exy = 9930.Compute r. As x increases does the value of r imply that y should tend to increase or decrease? Explain.
Compute the Kappa statistic and its standard error regarding reproducibility of the diagnosis of dyspnea in the clinic.
Fawns Fawns among1 or 5 months old in Mesa Verde National Park have a body weight that is approximately normally distributed with mean
A random sample of 100 students at Southern University was collected. The mean age was found to be 24.2 years, with a standard deviation of 3.4 years.
Would you conclude that your data set is approximately normal? If so, what percentage of your data values lie:
Formulate the null and alternative hypotheses for this application.
Assume that a decision maker wants to estimate a population proportion with 90% confidence and a margin of error of ±0.03. The decision maker has obtained a pilot sample of 10.
Consider the relationship between derived scores and the normal curve. In terms of the normal curve and how it relates to psychological testing and assessment.
What percentage of population scored between the mean and Jorge?
Use the following data to write the normal equations of the linear regression between Y and X, and find the least squares regression.
In other words, both variables have the same mean but different standard deviations. Draw rough sketches of the two normal curves on the same graph.
At α = 0.01 level of significance, test the hypothesis that these data can be described by a Poisson pdf.
Use frequency distribution to create a probability distribution, determine the (b) mean,(c) variance and (d) standard deviation of probability distribution and (e) interpret results in context of real life situation.
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