According to a census, 7.1% of all babies born are of low birth weight. An obstetrician...

Question

according to a census, 7.1% of all babies born are of low birth weight. An obstetrician wanted to know whether mothers between the ages of 35 and 39 yesrs 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-c       (a) If the proportion of low bwh weight babies for mothers in this age group is 0.071.compute the expected number of low birth weight births to 35-40 39-year-old mothers. What is the expected number of birth to mothers 35 to 39 years old that are not low bith weight? The expected number of our bith weight bittes to 35-16 39 year old mothers is The expected number of birth to mothers 35 to 39 years old that are not low birth weight is (Type integers or decimals) Answer the chutian's question at the 2016 kvel el significance using the chi square goodness of the State the null and alumnative hypotheses for this tout Hy 10071 WOT Use technology to complete for this test Use the Tech button for further (Round to be decimal places as needed) State a conclusion for this test in the context of the obstetrician's question. Choose the correct answer below O A Reject the null hypothesis. There is sufficient evidence to conclude that mothers between the ages of 35 and 39 years give birth to a higher percentage of low birth-weight babies at the a=0.10 level of significance OB. Do not reject the mul hypothesis. There is not suficient evidence to condude that mothers between the ages of 35 and 39 years give birth to a higher percentage of low birth weight babies at the a = 0.10 level of significance OC. Reject the ruil hypothesis. There is not sufficient evidence to conclude that mothers between the ages od 35 and 39 years give bath to a higher percentage of low birth weight babies at the a 0.10 level of significance OD. Do not reject the null hypothesis. There is sufficient evidence to condude that mothers between the age of 35 and 39 years give birth to a higher percentage of low-bit) Weight babies at the 0.10 level of significance te) Answer the obstetrician's question at the 0.10 level of significance using a test for a population proportion State the nail and alternative hypotheses for this test Ho 0071 H, Use technology to compute the value for this test Use the Tech Help button for further assistance P.valuecond to three decimal places as needed) 10.071 State a conclusion for this test in the context of the obstetrician's question. Choose the correct answer below. OA Do not reject the null hypothesis. There is not sufficient evidence to conclude that mothers between the age of 36 and 39 years give birth to a higher percentage of low-birth weight babies at the = 0.10 level of significance OB. Reject the null hypothesis. There is sufficient evidence to conclude that mothers between the age of 35 and 39 years give birth to a higher percentage of low-birth-weight babies at the e=0.10 level of significance OC. Do not reject the null hypothesis. There is sufficient evidence to condude that mothers between the age of 35 and 39 years give birth to a higher percentage of low-birth-weight babies at the a=0 10 level of significance OD. Reject the mall hypothesis. There is not sufficient evidence to conclude that mothers between the ages of 35 and 39 years give birth to a higher percentage of low-birth weight babies at the - 0.10 level of significance Click to select your answers)

 · Answer

expected number of low birth weight =np=240*0.071 =17.04

expected number of not low birth weight =np=240*0.071 =240*(1-0.071)=222.96

b)

null Hypothesis: Ho: p=		0.071
alternate Hypothesis: Ha: p ≠		0.071

applying chi square goodness of fit test:

	relative	observed	Expected	residual	Chi square
Category	frequency(p)	O_i	E_i=total*p	R²_i=(O_i-E_i)/√E_i	R²_i=(O_i-E_i)²/E_i
1	0.071	28	17.04	2.655	7.049
2	0.929	212	222.96	-0.734	0.539
total	1.00	240	240	1.921066958	7.59

test statistic X²=		7.588

p value =

0.006

from excel: chidist(7.588,1)

option A is correct

c)

null Hypothesis: Ho: p=		0.071
alternate Hypothesis: Ha: p ≠		0.071

p value =

0.006

option B is correct

.

According to a census, 7.1% of all babies born are of low birth weight. An obstetrician...

Question:

Answers

Similar Solved Questions

After two quarters of increasing levels of production, the CEO of Canadian Fabrication & Design was upset to learn that, during this time of expansion, productivity of the newly hired sheet metal metal workers declined with each new worker hired

Help me please Sived Help Save & 8 CH Imperial Jewelers manufactures and sells a gold...

Problem la: A volume of 10 in. long, 5 in. wide and 0.5 in. thick is...

An election and a proton are held on an x axis, with the electron at x...

4. Cancidero the two Surtexes oefned by enol Cobrdinte systems b Sketch the level ge Curves t x y...

7) We know that the frequency of the light remains constant. How do we account for...

QUESTION 18 Which of the following statements is CORRECT? 1. An investor can eliminate virtually all...

On January 2, 2017, Couture Ching Consigmore purchased howoon factures $12.000 cash, puting the fures to...

What is Character Development in a story? Why is this important?

Use technology to find the P-value for a right-tailed test about a mean with n equals=11...

Exercise 12-5 The current sections of Windsor, Inc.’s balance sheets at December 31, 2018 and 2019,...

1. Monitor Exercise: A file is to be shared among different processes, each of which has...

Acounting

X Company has the following estimated costs for 2020: Direct materials $55,200 Direct labor 21,000 Factory...

If a person's average speed for a 10.00 kilometer race is 5.644 meters per second, what was her winning time

Integrating areas between curves