A farmer was interested in determining how many grasshoppers were in his field. He knows that the distribution of grasshoppers may not be normally distributed in his field due to growing conditions.
As he drives his tractor down each row he counts how many grasshoppers he sees flying away. After several rows he figures the mean number of flights to be 57 with a standard deviation of 12. What is the probability of the farmer will count 60 or more flights on average in the next 40 rows down which he drives his tractor? A) 0.0571 B) 0.4429 C) 0.9429 D) 0.5710
Question 2
The mean age of professors at a university is 57.9 years. If a hypothesis test is performed, how should you interpret a decision that fails to reject the null hypothesis?
A) There is not sufficient evidence to reject the claim = 57.9.
B) There is sufficient evidence to reject the claim = 57.9.
C) There is sufficient evidence to support the claim = 57.9.
D) There is not sufficient evidence to support the claim = 57.9.
Field experiment on effects of predation on male guppy colouration
Gravity field of the Moon
Wheat field versus lavender field
Dropping a Sterile Item onto a Sterile Field
Role of Factors of Production in Determining Growth, 1975–2009
Survivorship curves. Blue lines are theoretical curves. Red dots are data from field studies.