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Does the type of cooking pot affect iron content? Iron-deficiency anemia is the most common form of malnutrition in developing countries, affecting about 50% of children and women and 25% of men. Iron pots for cooking foods had traditionally been used in many of these countries, but they have been largely replaced by aluminum pots, which are cheaper and lighter.
Some research has suggested that food cooked in iron pots will contain more iron than food cooked in other types of pots. One study designed to investigate this issue compared the iron content of some Ethiopian foods cooked in aluminum, clay, and iron pots.17 One of the foods was yesiga wet', beef cut into small pieces and prepared with several Ethiopian spices. The iron content of four samples of yesiga wet' cooked in each of the three types of pots follows. The units are milligrams of iron per 100 grams of cooked food.
(a) Make a table giving the sample size, mean, and standard deviation for each type of pot. Is it reasonable to pool the variances? Note that with the small sample sizes in this experiment, we expect a large amount of variability in the sample standard deviations.
(b) Run the analysis of variance. Report the F statistic with its degrees of freedom and P-value. What do you conclude?
A film developer claims that the mean number of pictures developed for a camera with 24 exposer is less than 22. If the hypothesis test is preformed, how should you interpret a decision a)reject the null hypothesis and b) fail to reject the null h..
Calculate a 95% Confidence Interval for the following samples:=450, N=200, σ=100=105, N=50, σ=15= 19, N = 17, s = 5= 8, N = 40, s = 1.6= 8.35, N = 30, s = 1.59
Identify the dependent and independent variables in this experiment.- Are there any extraneous variables that might have influenced this experiment?
Determine the minimum weight of the heaviest 5% of all items produced. If 27,875 of the items of the entire production weigh at least 5.01 ounces, how many items have been produced?
To test whether the significant difference between two sample variance using F-tests.
What is the probability that the shipment would be accepted?- To increase the probability of acceptance to at least 90%, it is decided to do one of the add some good pins to the shipment.
For a normally distributed random variable with mean -44 and standard deviation 16, find the probability that the value of the random variable will be above 0.
Suppose that events occur at random in the plane, in such a way that the number of events in a region i? is a random variable having a Poisson distribution with parameter λA, where A is a positive constant and A denotes the area of the region R.
The mean amount purchased by a typical customer at Churchill's Grocery Store is $23.50 with a standard deviation of $5.00. Assume the distribution of amounts purchased follows the normal distribution. For a sample of 50 customers, answer the follo..
Suppose a group of three Harper College students will be selected from a class that has 12 men and 16 women. What is the probability the group has at least one woman? Interpret this probability in context.
Does the article discuss the W s for the data?- What are the units of the variable?- Is the average used the median or the mean? How can you tell?
a. Design a UMPU level-a test of the null hypothesis Ho : µ, E [2, 4] versus Ha : µ, ¢ [2, 4]. You can base your test on the asymptotic normal distribution of the test statistic. b. Test the null hypothesis using a size .OS UMPU test. Does the..
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