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A random sample of 156 recent donations at a certain blood bank reveals that 78 were type A blood. Does this suggest that the actual
A random sample of 156 recent donations at a certain blood bank reveals that 78 were type A blood. Does this suggest that the actual percentage of type A donations differs from 40%, the percentage of the population having type A blood? Carry out a test of the appropriate hypotheses using a signicance level of 0.1. (a) What are the null and alternative hypotheses? H0: p > $ 0.4 HA: p 6 : 04 : (b) What is the test statistic? (Round your answer to 2 decimal places, if needed.) [2 (c) Using the appropriate statistical table, the p-value is |:] (Round your answer to 4 decimal places, if needed.) (d) Based on the pvalue, one should reject the null hypothesis, (e) This data provides sufficient evidence that the true percentage of type A donations is more than 40%. Check
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