22.2 Coin tossing. Refer to Exercise 22.1 (page 528). We tossed a coin only 50 times and got 21 heads, so the proportion of heads is

This is less than one-half. Is this evidence that our coin is not balanced? For the hypotheses you formulated in Exercise 22.1, find the P-value based on the results of our 50 tosses. Are the results significant at the 0.05 level?