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"A researcher designs an experiment to study the growth of pine trees at an early stage of their development. Towards this objective, a nursery worker records 39 measurements of the heights of 1-year-old pine seedlings. This set of height measurements are recorded in centimeters. Answer the following questions using the Histogram Applet.
Is 1.7cm a Plausible mean value? Explain.
People arrive at a restaurant at a rate of five per minute and wait to receive their order for an average of 5 mins. Customers eat in with a probability of 0.5 and carry out with a probability of 0.5.
A psychologist has to develop a new test of spatial perception, and she wants to estimate the mean score achieved by male pilots. How many people must she test if she wants the sample mean to be in error by no more than 2.0 points, with 95% confid..
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
Generate three random observations from the uniform distribution between -10 and 40 by using the following random numbers:
The number of degrees of freedom for the appropriate chi-square distribution in a test of independence is:
Categorize the following as discrete or continuous random variables.
Make a histogram for the r probability distribution.
What variables will be included, and collection methods used to obtain data. What is the population, sampling method used and why it is the best. Plan for data: describe what you will do with data once you have it, include types of graphs used and..
Critically discuss the auto-covariance function of a stationary time series and its basic properties.
Using the probabilities above what is the expected size of family you draw?
Estimate and interpret the p-value of the calculated test statistic above.
a) What type of research uses numeric measurement data? b) What type of research uses a research hypothesis? c) What type of research does not use statistical data analysis?
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