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In order to ?nd out whether children with chronic diarrhea have the same average hemo- globin level (Hb) that is normally seen in healthy children in the same area, a random sample of 10 children with chronic diarrhea are selected and their Hb levels (g/dL) are obtained as follows.
12.3 11.4 14.2 15.3 14.8 13.8 11.1 15.1 15.8 13.2
Do the data provide suf?cient evidence to indicate that the mean Hb level for children with chronic diarrhea is less than that of the normal value of 14.6 g/dL? Test the appropriate hypothesis using α = 0.01. Draw a box plot and normal plot for this data, and comment.
A certain component is critical to the operation of medical device and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of these components must..
1. A fair die is rolled 12 times. Given that there are exactly two ones, what is the probability that there are exactly two sixes? 2. A fair die is rolled twice. Compute the probability that the sum of the two rolls is 3, 5, 7, 9, 11, respectively,..
define basic and applied. your definitions should highlight the primary distinctions between the two types of research.
The lower limit for a 95% confidence interval for the population proportion if a sample of size 200 had a 40 success is.
These data were obtained in a comparison of two different methods for determining dissolved oxygen concentration (in milligrams per liter):
the diameter of an electric cable is normally distributed with a mean of 0.8 inch and a standard deviation of 0.03
a lot consisting of 150 fuses is inspected by the following procedure. five fuses are chosen at random and tested if
use the one-proportion z-test to perform an appropriate hypothesis test. be sure to check the conditions for using that
What is the slope? What is the y-intercept? Is the line dashed or solid? Is the area shaded below or above the line?
The U.S. Commission of Crime wishes to estimate the fraction of crimes related to firearms in an area with one of the highest crime rates in the country.
Would Kruskal-Wallis be the suitable statistical procedure to test this Research Question (RQ)? Describe your answer. When would you use Chi-Square test rather than One-Way Anova?
A certain researcher thinks that the proportion of women who say that female bosses are harshly critical is greater than the proportion of men.
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