45 How valium works Valium is a common sant and sedative A study investigated how valium works by comparing its effect on sleep in seven geneti cally modified mice and eight normal control mice There was no significant difference between the two groups The authors say that this lack of significance is related to the large inter individual variability that also reflected in the low power 20 of the test 12 a Explain exactly what power 20 against a specific alternative means b Explain in simple language why tests having low pow er often fail to give evidence against a null hypothesis even when the null hypothesis is really false c What fact about this experiment most likely ower