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(i) Is there sufficient evidence to indicate a difference among the mean

numbers of blades found per square meter per month for the three

stations? Use 0.05 .level of significance

(ii) Is there sufficient evidence to indicate a difference among the mean

numbers of blades found per square meter for the 4 months?

Use 0.05 .level of significance

(c) Place a 90% confidence interval on the difference in means between stations

1 and 3.