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Question: Chicken Delight claims that 90% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 100 orders revealed that 82 were delivered within the promised time. At the 0.10 significance level, can we conclude that less than 90% of the orders are delivered in less than 10 minutes?
a) What is the decision rule? (Negative amount should be indicated by a minus sign. Round your answer to 2 decimal places.)
b) Compute the value of the test statistic. (Negative amount should be indicated by a minus sign. Round the intermediate values and final answer to 2 decimal places.)
c) What is your decision regarding the null hypothesis?
Using the sample information given in the above exercise, the p value for testing Ho versus Ha can be calculated to be 0.0057
Event A occurs with probability 0.2. Event B occurs with probability 0.3. Event C occurs with probability 0.4. If A, B, and C are disjoint, then
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