A scientist suspects that there is positive correlation between nutrient concentration in soil and the height of plants grown in it. For a random sample of 12 plants, the sample product moment correlation coefficient is r=0.468r=0.468r=0.468. The one-tailed critical value at the 5% significance level is 0.4973.
Carry out the test.
178 exam-style questions on WJEC A Level Maths 4.3.1 Statistical hypothesis testing (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.