Skip to content

Course home

2.5.3 Hypothesis test for a Normal mean (A-level only)

2.5.3 Hypothesis test for a Normal mean (A-level only)

MediumHard
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889
Question 73

An agricultural scientist monitors the growth of a specific variety of wheat. Past data shows that the mean yield per plot is 42.0 kg with a standard deviation of 4.5 kg.

Following the introduction of a new fertilizer, it is claimed that the mean yield of this wheat variety has changed. To test this claim, a random sample of 64 plots is treated with the new fertilizer.

The total yield for these 64 plots is 2758.4 kg.

Assuming that the yields are normally distributed, test at the 5% significance level the claim that the mean yield has changed.

[5]
Markscheme

2.5.3 Hypothesis test for a Normal mean (A-level only) Questions

  1. A Level
  2. /Maths
  3. /2.5.3 Hypothesis test for a Normal mean (A-level only)

130 exam-style questions on AQA A Level Maths 2.5.3 Hypothesis test for a Normal mean (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.

Question bank