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 0.05 level of significance, test a teacher's claim that the number of tardy students does vary by the month. Number Aug. Sept. Oct. 9 16 11 Tardy Students Nov. Dec. Jan. Feb. Mar. Apr. May 7 12 9 17 19 6 15 Copy Data 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.

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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 0.05 level of significance, test
a teacher's claim that the number of tardy students does vary by the month.
Number
Aug. Sept. Oct.
9
16 11
Tardy Students
Nov.
7
Dec. Jan. Feb. Mar. Apr. May
12
9 17 19 6 15
Copy Data
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.
Transcribed Image Text: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 0.05 level of significance, test a teacher's claim that the number of tardy students does vary by the month. Number Aug. Sept. Oct. 9 16 11 Tardy Students Nov. 7 Dec. Jan. Feb. Mar. Apr. May 12 9 17 19 6 15 Copy Data 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.
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 0.05 level of significance, test
a teacher's claim that the number of tardy students does vary by the month.
Number
Aug. Sept. Oct.
9 16
11
Tardy Students
Nov.
7
Dec. Jan. Feb.
12 9 17
Mar. Apr. May
19 6 15
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.
Ho: Pi =
Ha: There is a difference in tardiness from month to month.
Transcribed Image Text: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 0.05 level of significance, test a teacher's claim that the number of tardy students does vary by the month. Number Aug. Sept. Oct. 9 16 11 Tardy Students Nov. 7 Dec. Jan. Feb. 12 9 17 Mar. Apr. May 19 6 15 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. Ho: Pi = Ha: There is a difference in tardiness from month to month.
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