Question

Chapter 7-23. Chapter 7-25 Chapter 7-29 Chapter 7-33. Chapter 8 17 Researchers were interested in determining whether women are increasing their folc acid intake after a positive pregnancy test. The average folic acid intake is 150 mcg. Using the information below, answer the following questions. Using the data below, answer the following questions. I. What is the null and alternate hypotheses? 2. Indicate the sample size. 3, Indicate the sample mean. 4. Indicate the sample standard deviation. 5. Indicate the Mean difference. 6. What is the t value and degrees of freedom? 7. What is the p value? 8. Based on the information, what is your conclusion based on the original hypotheses? One-Sample Statistics N Mean Std. Deviation Std. Error Mean Folic Acid 500 182.78 101.998 4.561 One-Sample Test Test Value 150 tdfSig. (2-tailed) Mean Difference 32.778 95% Confidence Interval of the Difference Lower Folic Acid 7.186 499000 23.82 41.74

Answer 1

1. Average folic acid intake = $\mu$ mcg (let)

Null hypothesis H₀ : $\mu$=150 Alternative hypothesis H₁ : $\mu$<150

2. Sample size = 500

3. Sample mean = 182.76 mcg

4. Sample standard deviation = 101.998 mcg

5. Mean difference = 32.778 mcg

6. t value = 7.186 Degrees of freedom = 499

7. p value = P(T<7.186|T~t₄₉₉) = 1.00

8. Conclusion: H₀ is accepted at level of significance 0.000, i.e

It is accepted that women are increasing their folic acid intake after a positive pregnancy test.