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To detect the presence of harmful insects in farm fields, we can put up boards covered with a sticky material and examine the insects trapped on the boards. Which colours attract insects best? Experimenters placed six boards of each of four colours at random locations in a field of oats and measured the number of cereal leaf beetles trapped. Here is the data:
(a) Use all steps of an appropriate statistical method to determine whether there are differences in the means of the number of cereal leaf beetles, in terms of colour preference, based on the numbers trapped on the different coloured boards.
(b) If appropriate, carry out post-hoc multiple comparisons of group means. Explain your results. If you choose to not conduct post-hoc tests, explain why.
(c) State any assumptions you have made and assess whether these are met with this data.
You need to demonstrate understanding of statistical inference for numerical variables. You must provide a copy of relevant JMP output for your answer. You may calculate by hand, but you must show appropriate working.
Eexperiment begins the instant after the zeroth car goes by. Determine, in as simple form as possible, expressions for the probability that?
How many months must be sampled for analysis to be 99% confidence that the error in estimating the average monthly price of gasoline is at most $0.03.
Solve for the following items: The point on the x-axis that is equidistant (equal distance)from (10,4) and (6,2).
A medical doctor wishes to test the claim that the standard deviation of the systolic blood pressure of deep sea divers is less than 450. To do so, she selected a random sample of 20 divers and found s = 432.
Make for more scatter plots comparing GDP growth 1970-2000 to corruption, political rights, rule of law, and socio-political instability
A arbitrary sample of 8 students is selected. Illucidate the probability that among the students in the sample at least 7 are female.
Determine how many miles they live from the Bank, is the mean travel distance for this sample considered a parameter or a statistic? Explain.
Sketch curves representing the distribution of the original population and the sampling distribution of x for a sample of size n+16.
Given the following data, use exponential smoothing with a=0.2 and a=0.5 to generate forecasts for periods 2 through 6. Use MAD and MSE to decide which of the two models produced a better forecast.
Explain why it might be important to look at cancer incidence that is age-adjusted rather than just cancer incidence. Perform simple linear regression on these data and report your finding.
What sample size is needed to estimate with 95% confidence the mean intake of calcium within 20 units of the true mean if the intake is from a normal distribution with a variance of 1900 units?
The password of 52 digit sequence is made. It consists of 0 and 1. How various different possibilities exist for networks password.
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