Question

2. Does a woman’s chance of suffering from postpartum depression vary depending on the number of children she already has? To find out, a researcher collected random samples from four groups of women: the first group having just given birth to their first child; the second group having just given birth to their second child; and so on. She then rated their amount of postpartum depression on a scale from 1 to 5 (with a score of “5” indicating a higher level of depression). Test the null hypothesis that the chances of developing postpartum depression do not differ with the number of children to which a woman has previously given birth. Assume an ? = .01. First Child Second Child Third Child Fourth Child 2 3 5 4 1 5 5 3 3 1 3 2 2 2 5 1 2 4 2 5 X-bar1 = 2.0 X-bar2 = 3.0 X-bar3 = 4.0 X-bar4 = 3.0 X-bar_total = 3.0 a. State the null and research hypotheses. b. State the level of significance. c. State the formula for the test-statistic you will use (and df, if appropriate). d. Calculate your critical test-statistic score. e. Calculate your research test-statistic score. f. Interpret your finding in the context of the problem.

          2. Does a woman’s chance of suffering from postpartum depression vary depending on the number of children she already has? To find out, a researcher collected random samples from four groups of women: the first group having just given birth to their first child; the second group having just given birth to their second child; and so on. She then rated their amount of postpartum depression on a scale from 1 to 5 (with a score of “5” indicating a higher level of depression). Test the null hypothesis that the chances of developing postpartum depression do not differ with the number of children to which a woman has previously given birth. Assume an ? = .01.

First Child    Second Child    Third Child    Fourth Child
2              3               5              4
1              5               5              3
3              1               3              2
2              2               5              1
2              4               2              5

X-bar1 = 2.0    X-bar2 = 3.0    X-bar3 = 4.0    X-bar4 = 3.0

X-bar_total = 3.0

a. State the null and research hypotheses.
b. State the level of significance.
c. State the formula for the test-statistic you will use (and df, if appropriate).
d. Calculate your critical test-statistic score.
e. Calculate your research test-statistic score.
f. Interpret your finding in the context of the problem.

2. Does a woman’s chance of suffering from postpartum depression vary depending on the number of children she already has? To find out, a researcher collected random samples from four groups of women: the first group having just given birth to their first child; the second group having just given birth to their second child; and so on. She then rated their amount of postpartum depression on a scale from 1 to 5 (with a score of “5” indicating a higher level of depression). Test the null hypothesis that the chances of developing postpartum depression do not differ with the number of children to which a woman has previously given birth. Assume an ? = .01.

First Child Second Child Third Child Fourth Child
2 3 5 4
1 5 5 3
3 1 3 2
2 2 5 1
2 4 2 5

X-bar1 = 2.0 X-bar2 = 3.0 X-bar3 = 4.0 X-bar4 = 3.0

X-bartotal = 3.0

a. State the null and research hypotheses.
b. State the level of significance.
c. State the formula for the test-statistic you will use (and df, if appropriate).
d. Calculate your critical test-statistic score.
e. Calculate your research test-statistic score.
f. Interpret your finding in the context of the problem.

Added by Miguel A.

Question

Please give Ace some feedback