Question 11 2 pts A researcher knows that \"maternal attachment\" (MA) scores of

Question

Question 11 2 pts A researcher knows that "maternal attachment" (MA) scores of 18 month old toddlers who were breastfed is normally distributed with 7.5 and ? 12. High scores indicate greater maternal attachment with the MA test; the maximum score is 10. She speculates that 18 month old toddlers who are not breastfed will differ in terms of their MA scores from those who were breastfed. With a sample of N 20 non- breastfed toddlers, the researcher obtained the MA scores below. MA scores of non- breastfed toddlers: 8, 5, 4, 3, 7, 2, 3, 7,9, 4, 6, 8, 2, 8, 8, 9, 6, 7, 7,5 Complete step 3 of the hypothesis testing procedure and calculate the appropriate z,t, or r. Round to the nearest hundredths place. If your calculated z, t, or r is not identical to one of the values below, but within plus or minus 0.16 of an answer below, assume it's a rounding error and select the answer that is closest to your calculated value. Ignore the minus sign if your calculated z or t is negative, but if you calculate r and it's negative, of course, write the minus sign O -62 2.96 O3.15 5.97 6.36 the correct value of z,t, or r is not listed in alternatives "a" through "e", even when

Explanation / Answer

Solution11:

pop mean=7.5

sigma=1.2

xbar=sum/total=118/20=5.9

Z=sample mean-pop mean./sample sd/sqrt(n)

=5.9-7.5/1.2/sqrt(20)

z =-5.96

z=5.97

omit negative as indicated in question

OPTION D

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.