Q3. An experiment was conducted to compare the mean number of tapeworms in the stomachs of sheep that had been treated for worms against the mean number in those that were untreated. A sample of 14 worm-infected lambs was randomly divided into two groups. Seven were injected with the drug and the remainder were left untreated. After a six-month period, the lambs were slaughtered and the following worm counts were recorded: Drug-treated sheep: 18, 43, 28, 50, 16, 32, 13; Untreated Sheep: 40, 54, 26, 63, 21, 37, 39;

Use a significance level a= 0.05, can you conduct a hypothesis test whether there is a mean difference

between these two groups.