SOLUTION: A study of iron deficiency among infants compared samples of infants following different feeding regimens. One group contained breast-fed infants, while the children in other group
Algebra.Com
Question 187177: A study of iron deficiency among infants compared samples of infants following different feeding regimens. One group contained breast-fed infants, while the children in other group were fed a standard baby formula without any iron supplements. Here are summary results on blood hemoglobin levels at 12 months of age.
Group n Mean s
Breast-fed 23 13.3 1.7
Formula 19 12.4 1.8
a.) Is there significant evidence that the mean hemoglobin level is higher among breast-fed babies? State null hypothesis and alternate hypothesis and conduct at –test.
b.) Give a 95% confidence interval for the mean difference in hemoglobin level between the two populations of infants.
qus 2
A small accounting firm pays each of its five clerks Rs 25000, two junior accountants Rs 60000, and the firm‘s owner Rs 255000. What is the mean salary paid at this Firm? How many of the employees earn less than the mean? What is the median salary?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A study of iron deficiency among infants compared samples of infants following different feeding regimens. One group contained breast-fed infants, while the children in other group were fed a standard baby formula without any iron supplements. Here are summary results on blood hemoglobin levels at 12 months of age.
Group...... n Mean. s
Breast-fed 23 13.3 1.7
Formula... 19 12.4 1.8
a.) Is there significant evidence that the mean hemoglobin level is higher among breast-fed babies? State null hypothesis and alternate hypothesis and conduct a t –test.
Ho: u(breast)-u(formula) = 0
Ha: u(breast)-u(formula) > 0
---
I ran a 2-Sample T-test and got the following results:
test statistic: t = 1.2862
p-value: 0.1031
df = 37.5976
Conclusion: Since the p-value is greater than 5%, Fail to reject Ho.
---------------------------------------------------------------------------
b.) Give a 95% confidence interval for the mean difference in hemoglobin level between the two populations of infants.
---
I ran a 2-Sample T-Test Interval program of got the following:
95% C.I.: -0.4021< u(b)-u(f) < 1.8021
=====================================================
A small accounting firm pays each of its five clerks Rs 25000, two junior accountants Rs 60000, and the firm‘s owner Rs 255000. What is the mean salary paid at this Firm? How many of the employees earn less than the mean? What is the median salary?
mean = 500000/8 = 62500
# less than mean is 7 employees
median 25000
=======================================
Cheers,
Stan H.
RELATED QUESTIONS
A study of iron deficiency among infants compared samples of infants following different
(answered by stanbon)
A study of iron deficiency among infants compared samples of infants following different... (answered by stanbon)
A study reports that the mean birth weight of 81 full-term infants is 6.1 pounds. The... (answered by Fombitz)
The mean weight of newborn infants at a community hospital is 6.6 pounds. A sample of... (answered by stanbon)
In a daycare program 14% of the children are in the infants and toddler classes. If there (answered by ikleyn)
Question 1
Select one answer.
10 points
In order to study whether IQ level is related (answered by ikleyn)
The distribution of head circumference for full term newborn female infants is... (answered by Boreal)
researchers wished to know if they could conclude that two populations of infants differ... (answered by ikleyn)
8. A hospital in a large city records the weight of every infant born at the hospital.... (answered by ikleyn)