Answered step by step
Verified Expert Solution
Question
1 Approved Answer
Homework: Ch 12 HW: ChiSquare Procedure Question 8, 12.1.25.T Part 6 of 7 HW Score: 93.35%, 14.94 of 16 points O Points: 0.79 ofl
Homework: Ch 12 HW: ChiSquare Procedure Question 8, 12.1.25.T Part 6 of 7 HW Score: 93.35%, 14.94 of 16 points O Points: 0.79 ofl Save According to a census company, 10.1% ot all babies born are ot low birth weight. An obstetrician wanted to know wnetner mothers between the ages ot 35 and 39 years give birth to a higher percentage of low-birth-weight babies. She randomly selected 240 irtns tor which the mother was 35 to 39 years old and found 28 low-birth-weight aies. Complete parts (a) through (c) below (a) It the proportion ot low-birth-weight babies tor mothers in this age group is O. 101, compute the expected number of low-ih-weignt births to 35- to 39-year-old mothers. What is the expected number ot births to mothers 35 to 39 years old that are not low birth weight? The expected number ot low-birth-weight births to 35- to 39-year-old mothers is 2424 The expected number ot births to mothers 35 to 39 years old that are not low birth weight is 21576 (Type integers or decimals.) (b) Answer the obstetrician's question at the a = 0.10 level ot significance using the chi-square goodness-ot-tit test State the null and alternative hypotheses for this test p p o. 101 > 0.101 use technology to compute the R-value tor this test use the Tecn Help button tor turtner assistance. P-value= 0.421 (Round to three decimal places as needed.) State a conclusion for this test in the context ot the obstetrician's questiom Choose the correct answer below. Reject the null hypothesis. There is not sufficient evidence to conclude that mothers between the ages ot 35 and 39 years give irtn to a higher percentage ot low-irtn-weignt babies at the C 10 level of significance. Reject the null hypothesis. There is sufficient evidence to conclude that mothers between the ages ot 35 and 39 years give birth to a higher percentage of low-birth-weight babies at the 0.10 level ot significance. Do not reject the null hypothesis. There is sufficient evidence to conclude that mothers between the ages ot 35 and 39 years give irtn to a higher percentage ot low-irtn-weignt babies at the C 10 level of significance. Do not reject the null hypothesis. There is not sufficient evidence to conclude that mothers between the ages of 35 and 39 years give irtn to a nigher percentage ot low-irtn-weignt aies at the (1 = O. 10 level ot significance. (c) Answer the obstetrician's question at the C 10 level ot significance using a z-test tor a population proportion. State the null and alternative hypotheses tor this test p p o. 101 > 0.101 use technology to compute the R-value tor this test use the Tecn Help button tor turtner assistance. (Round to three decimal places as needed.) p_value =
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started