Iron-deficiency anemia is an important nutritional health problem in the UnitedStates. A dietary assessment was performed on 51 boys, 9 to 11 years of agewhose families were below the poverty level. The mean daily iron intake amongthese boys was found to be 12.50 mg with standard deviation 4.75 mg. Supposethe mean daily iron intake among a large population of 9- to 11-year-old boysfrom all income strata is 14.44 mg. We want to test whether the mean ironintake among the low-income group is different from that of the generalpopulation.a. State the hypotheses.b. State the type I and type Il errorC. Compute for test statistic td. Write the conclusion.

Given that, Iron-deficiency anemia is an important nutritional health problem in the United States.…

Answered: Iron-deficiency anemia is an important…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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According to the Center for Disease Control and Prevention (CDC), the mean life expectancy in 2015 for non‑Hispanic black males was 71.8 years. Assume that the standard deviation was 15 years, as suggested by the Bureau of Economic Research. The distribution of age at death, ?, is not normal because it is skewed to the left. Nevertheless, the distribution of the mean, ?⎯⎯⎯, in all possible samples of size ? is approximately normal if ? is large enough, by the central limit theorem. Suppose that Esmé is a researcher for a large, for-profit hospital company. She takes a simple random sample of ?=100 non‑Hispanic black males obtained from all death records over the past year. Determine the sample mean, ?⎯⎯⎯, such that the probability is 99% that the mean in Esmé's sample will be greater than ?⎯⎯⎯. You may find a table of critical values useful. Give your answer to the precise to one decimal place. ?⎯⎯⎯= years
This data set is composed of incidence rates of Kaposi’s sarcoma in seventeen different regions of Tanzania. Reported in cases/million/year. 6.1, 6.3, 6.4, 6.6, 6.6, 7.2, 8.4, 8.5, 1.2, 1.6, 2.0, 2.3, 2.4, 2.6, 4.2, 4.2, 4.5 Calculate and interpret a 95% confidence interval. State the assumptions for a valid a 95% confidence interval.
What information is provided by calculations of the “F” test statistic?
The U.S. Census Bureau computes quarterly vacancy and homeownership rates by state and metropolitan statistical area. Each metropolitan statistical area has at least one urbanized area of 50,000 or more inhabitants. The data in Sheet 10 are the rental vacancy rates (%) for metropolitan statistical area in four geographic regions of the U.S. for the first quarter of 2008. Use alpha = 0.05 to test whether the mean vacancy rate is the same for each geographic region. Sheet 10 Midwest Northeast South West 16,2 2,7 16,6 7,9 10,1 11,5 8,5 6,6 8,6 6,6 12,1 6,9 12,3 7,9 9,8 5,6 10 5,3 9,3 4,3 16,9 10,7 9,1 15,2 16,9 8,6 5,6 5,7 5,4 5,5 9,4 4 18,1 12,7 11,6 12,3 11,9 8,3 15,6 3,6 11 6,7 18,3 11 9,6 14,2 13,4 12,1 7,6 1,7 6,5 8,7 12,9 3,6 11,4 5 12,2 11,5 13,1 4,7 13,6 16,3 4,4 3,3 8,2 3,4 24 5,5 12,2 22,6 12 14,5 12,6 9,5 10,1 Select one: a) Sum of Squares Between Groups = 376.87 >…
Why is shoe sizes of that child are between 5 to 10 is considered as a discrete quantitative variable?
The average amount of weight loss, in pounds, by 10 participants in a six-month weight-reduction program is 24.1 pounds. The median weight loss for these participants is 26.4 pounds. Using the empirical relationship among mean, median, and mode, estimate the mode and comment on the skewness of the distribution.
According to the Center for Disease Control and Prevention (CDC), the mean life expectancy in 2015 for non‑Hispanic black females was 78.1 years. Assume that the standard deviation was 15 years, as suggested by the Bureau of Economic Research. The distribution of age at death, ?, is not normal because it is skewed to the left. Nevertheless, the distribution of the mean, x¯, in all possible samples of size ?n is approximately normal if ? is large enough, by the central limit theorem. Let x¯ be the mean life expectancy in a sample of 100 non‑Hispanic black females. Determine the interval centered at the population mean ? such that 95% of sample means x¯ will fall in the interval. Give your answers precise to one decimal What are the upper and lower limits?
4. A surgeon is experimenting with a new technique for implanting artificial blood vessels. Using this technique, the mean time for clotting of artificial blood vessel has been 32.5 days with a standard deviation of 2.6 days. How long would a vessel have to stay open to be in the 95th percentile?
The two, box and whisker diagrams below show the percentage marks obtained by two Grade 12 classes. Each class has 26 learners. Class A Class B O 10 20 30 40 50 60 70 80 90 100 The percentage marks for Class A, arranged in order, are given below: F: 58 60 62 62 63 65 65 66 66 66 66 67 69 70 71 73 73 90 [SASAMS database] 75 75 75 H 80 83 85 NOTE: Fis the lowest percentage mark H is a percentage mark between 75 and 80
You collect information on a random sample of women and obtain estimates on vitamin D exposure. However, the results that you find are different than those conducted at another study site. Should you be concerned? Explain your answer using the concept of sampling variability
In a random sample of 500 teenagers 12 to 17 years old, it was found that 330 have regular access to computers and the Internet. Find a point estimate of the true proportion of teenagers 12 to 17 years old who have regular access to computers and the Internet.
What is the relationship between a person's income and their level of education, and how can this be measured using statistical methods?

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