Health Medical Homework Help

Statistical Inference Questionnaire

1- What is a statistical inference?

Group of answer choices

AN ESTIMATE ABOUT A POPULATION BASED ON INFORMATION CONTAINED IN A SAMPLE.

A STATEMENT MADE ABOUT A SAMPLE BASED ON THE MEASUREMENTS IN THAT SAMPLE.

A SET OF DATA SELECTED FROM A LARGER SET OF DATA.

AN ESTIMATE ABOUT A SAMPLE BASED ON INFORMATION CONTAINED IN A POPULATION.

A set of data that characterizes some phenomenon.

2-We wish to test the null hypothesis that the average BMI of women in Cleveland is equal to 24 at a = .05. A sample of 500 is selected from the population and the p-value of the test is determined to be .01. We then:

Group of answer choices

FAIL TO REJECT H0

REJECT H0

THERE IS NOT ENOUGH INFORMATION TO MAKE A CONCLUSION.

REJECT H1

ACCEPT H1

3-Which of the following statements is considered a null hypothesis?

Group of answer choices

THE CHILDREN WHO WATCH MORE THAN 2 HOURS OF TV HAVE THE SAME MEAN WEIGHT GAIN AS CHILDREN WHO WATCH TV LESS THAN 2 HOURS.

THE PROPORTION OF WOMEN WHO SMOKE IS NOT EQUAL TO THE PROPORTION OF MEN WHO SMOKE. PORT

THE MEAN AGE IS GREATER THAN 50.

THE MEAN BLOOD PRESSURE IS NOT THE SAME FOR MEN AND WOMEN.

4-You have measured the blood lead levels (?g/dL) of a random sample of 30 children living in an urban area. A 90% confidence interval for the mean blood lead levels for the children is computed to be (10.1, 35.8). According to the Center for Disease Control and Prevention (CDC), a blood lead level of 10 µg/dL or above is problematic. Provide an interpretation of this interval. (10 points)

5-A study was conducted to examine whether the mean number of cigarettes smoked per day is different from 3. a. State the null and research hypotheses for this test. b. Suppose the p-value associated with the test is 0.01. What can you conclude?

6-A doctor reads that a 95% confidence interval for the mean birth weight of SIDS cases in the U.S. is 2774 grams to 3222 grams. The doctor interprets this as 95% of all infants who died of SIDS had a birth weight between 2774 grams and 3222 grams. Is this a correct interpretation? Explain your response.

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