According to research conducted by the fictional agency entitled Birth Rate and Health Outcomes, a sample...
According to research conducted by the fictional agency entitled Birth Rate and Health Outcomes, a sample of 3,500 women who gave birth reported that the sample mean age of first-time mothers in the U.S. was 24 years old with a sample median age of 21 and a sample standard deviation of 3.35.[i]
- What is the point estimate of the population mean?
b. Statistically speaking, how would you define an unbiased estimator?
c. Based on the limited information presented, is this distribution likely to be skewed right, left, or normal? Explain.
d. Compute the 99% confidence interval of the population mean and interpret it.
e. Researchers hypothesize that the population mean age of first-time mothers is 23 years old. Will you reject or retain their hypothesis based on your work above? Explain.
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According to research conducted by the fictional agency entitled
Birth Rate and Health Outcomes, a sample...
Question 8 Child Health and Development Studies (CHDS) has been collecting data about Select expectant mothers...
Question 8 Child Health and Development Studies (CHDS) has been collecting data about Select expectant mothers in Oakland, CA since 1959. One of the measurements taken to points by CHDS is the age of first time expectant mothers. Suppose that CHDS finds the average age for a first time mother is 26 years old. Suppose also that, in 2015, a random sample of 50 expectant mothers have mean age of 26.5 years old, with a standard deviation of 1.9 years....
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Question 8 Child Health and Development Studies (CHDS) has been collecting data about Select expectant mothers in Oakland, CA since 1959. One of the measurements taken to points by CHDS is the age of first time expectant mothers. Suppose that CHDS finds the average age for a first time mother is 26 years old. Suppose also that, in 2015, a random sample of 50 expectant mothers have mean age of 26.5 years old, with a standard deviation of 1.9 years....
problem that causes abnormally small heads, among other things There are strong concerns that the Zika virus can cause microcephaly. Detecting microcephaly in can help expectant parents be prepared. Head diameter measurements can be made in utero ultrasound at 20 weeks. Bipariet fetal head) measurements were taken on 71 newborn infants with exposure to Zka and suspected to have microcephaly (they were eventually confirmed at birth to have microcephaly). The sample mean 34 mm. The sample standard deviation is 5...
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2) Populations versus samples. For each statement, answer with either population, sample, or both. A) The complete set of information. B) A portion, not all, of the information. C) Has the potential to be biased or misleading. D) Measured or summarized with parameters. E) Measured or summarized with statistics. 3) Descriptive versus inferential statistics. For each statement, answer with either descriptive or inferential statistics. A) Facts about samples. B) Educated guesses about populations based on samples. C) The world population...
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sample selected ? We’re demographics collected ?
2. Is the sample representative of the target population? If
not how was the sample “improved “ to make the results more
reliable and valid?
3. What is the design of the study?
4. How were the human subjects protected ?
5. Were instruments used reliable and valid ? Did they measure
the phenomenon under the study( how do you know that...
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