Question

Please explain how to solve p-value using Ti-84 caculator ***only answer if you know how to solve this on a calculator Ti-84***

Homework: Ch 12 HW: ChiSquare Procedure Score: 0.93 of 1 pt Po 12.1.27-T Save 6 of 15 (15 complete) HW Score: 99.52%, 14.93 of 15 pts Question Help According to a census company, 10.1% of all babies born are of low birth weight. An obstetrician wanted to know whether mothers between the ages of 35 and 39 years give birth to a higher percentage of low-birth-weight babies. She randomly selected 240 births for which the mother was 35 to 39 years old and found 28 low-birth-weight babies. Complete parts (a) through (c) below. (a) If the proportion of low-birth-weight babies for mothers in this age group is 0.101, compute the expected number of low-birth-weight births to 35- to 39-year-old mothers. What is the expected number of births to mothers 35 to 39 years old that are not low birth weight? The expected number of low-birth-weight births to 35- to 39-year-old mothers is 24.24 The expected number of births to mothers 35 to 39 years old that are not low birth weight is 215.76 Type integers or decimals.) (b) Answer the obstetrician's question at the alternative hypotheses for this test. 0.10 level of significance using the chi-square goodness-of-fit test. State the null and Ho: p 0.101 H1 p 0.101 Use technology to compute the P-value for this test. Use the Tech Help button for further assistance. P-value 0.421 (Round to three decimal places as needed.) State a co sion for this test in the context of the obstetrician's question. Choose the correct answer below.

Answer 1

b)

We have ,

	Observed frequency ( Oi )	Expected frequency( Ei )
Low birth weight	28	24.24
Not Low birth weight	212	215.76
Total	N = 240

Using TI-84 -

First Enter Observed and Expected frequency data.

press STAT ------> Edit ------> Enter observed frequencies in L1 and Expected frequencies in L2

Now press STAT ----> TESTS -----> Select - X² GOF-Test ----> Hit Enter.

Now Enter Observed : L1, Expected : L2 , DF = 1 ------> Highlight calculate and hit Enter.

( df = Number of expected frequency - 1 = 2 - 1 = 1 )

Output :

P-value = 0.421