Answer Happy

A school principal claims that the number of students who are tardy to school does not vary from month to month. A survey over the school year produced the following results. Using a 0.10 level of significance, test a teacher's claim that the number of tardy students does vary by the month. Tardy Students Aug. Sept. Oct. Nov. Dec. Jan. Feb. Mar. Apr. May 19 12 8 15 19 127 9 8 18 Number 8 Copy Data Step 1 of 4: State the null and alternative hypotheses in terms of the expected proportion for each month. Enter your answer as a fraction or a decimal rounded to six decimal places, if necessary. Hop He: There is a difference in tardiness from month to month. Step 2 of 4: Calculate the expected value for the number of tardies in April. Enter your answer as a fraction or a decimal rounded to three decimal places. Step 3 of 4: Compute the value of the test statistic. Round any intermediate calculations to at least six decimal places, and round your final answer to three decimal places, Step 4 of 4: Draw a conclusion and interpret the decision.