The mean ±1 sd of ln [calcium intake (mg)] among 25 females, 12 to 14 years of age, below the poverty level is 6.56 ± 0.64. Similarly, the mean ± 1 sd of ln [calcium intake (mg)] among 40 females, 12 to 14 years of age, above the poverty level is 6.80 ± 0.76. 8.2 Test for a significant difference between the variances of the two groups. 8.3 What is the appropriate procedure to test for a significant difference in means between the two groups? 8.4 Implement the procedure in Problem 8.3 using the critical-value method.
The mean ±1 sd of ln [calcium intake (mg)] among 25
females, 12 to 14 years of age, below the poverty level is
6.56 ± 0.64. Similarly, the mean ± 1 sd of ln [calcium intake
(mg)] among 40 females, 12 to 14 years of age, above the
poverty level is 6.80 ± 0.76.
8.2 Test for a significant difference between the variances
of the two groups.
8.3 What is the appropriate procedure to test for a significant difference in means between the two groups?
8.4 Implement the procedure in Problem 8.3 using the
critical-value method.
8.5 What is the p-value corresponding to your answer to
Problem 8.4?
8.6 Compute a 95% CI forThe mean ±1 sd of ln [calcium intake (mg)] among 25
females, 12 to 14 years of age, below the poverty level is
6.56 ± 0.64. Similarly, the mean ± 1 sd of ln [calcium intake
(mg)] among 40 females, 12 to 14 years of age, above the
poverty level is 6.80 ± 0.76.
8.6 Compute a 95% CI for the difference in means
between the two groups.
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