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https://www.mathud.com/Student/PlayerHom ework.aspx?homeworkld-445141939&questionid-7;&flushed; false&cld-46708898; Priceline.co Math 281 Intro to Statistics Fall 2017 (J. Winter) Kelsey Wood 12/5/17 11:41 AM Homework: U3 HW 3: Section 10.5 (Inferences For 2 Popu. Mean Save Assignm Score: 0.56 of 1 pt 7of8(8 complete) HW Score: 85.78%, 6.86 of 8 pts 10.5.155-P 8 A group of 8 students were given the same Question Help * Do standardized test twice to see whether retaking the test afflected the score. The 40-40 5020 20 20 40 40 A. table gives the score improvements for the 8 students. Complete parts a through e. No Yes do the data provide sufficient evidence to conclude that the mean scores from the first and second tests (retake) differ? (Note d11.25 and sd-36.03) Preliminary data analyses indicate that use of a paired t-test is reasonable wnat are the hypotheses tor the -Hest? Na Find the test statistic (Round to three decimal places as needed ) Find the P-value to four decimal places as needed.) Enter your answer in the answer box and then click Check Answer 1 Penaining Clear All To se OK

Explanation / Answer

By using ti-84 we can find P-value easily.

Path is 2ND ------> VARS -------> tcdf ( -------> Enter values

Lower: test statstic ( 0.883)

upper: 1000000

df: 7

paste

We get probability = 0.2032

Our hypothesis is two tail test, so we have to multiply by 2

So p-value = 2*0.2032 = 0.4064

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