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Antibiotic use in children. The bar plot and the pie chart below show the distribution of pre-existing medical conditions of children involved in a study on the optimal duration of antibiotic use in treatment of tracheitis, which is an upper respiratory infection.
(a) What features are apparent in the bar plot but not in the pie chart?
(b) What features are apparent in the pie chart but not in the bar plot?
(c) Which graph would you prefer to use for displaying these categorical data?
Coins. A coin is to be tossed 36 times. a) What are the mean and standard deviation of the number of heads?
a researcher tests whether levels of education and income levels are related. in this study he observes the following
a manufacturing engineer is studying the dimensional variability of a particular component that is produced on three
in a study investigating the effect of car speed on accident severity 5000 reports of fatal automobile accidents were
a sample of 148 college students at a large university reports getting an average of 6.85 hours of sleep last night
Test whether the true proportion of all life insurance claims made to this company that are settled within 30 days is less than 85%.
Explain each sampling technique discussed in the "Visual Learner: Statistics" in your own words, and give examples of when each technique would be appropriate.
questiona search the internet for the latest figures you can find on the age and sex of the australian population.b
The drug finasteride is marketed as Propecia to help protect against male pattern baldness, and it also may protect against prostate cancer.
A food processor is concerned that the 16 oz. can of sliced pineapple is being overfilled. The quality control department took a random sample of 50 cans and found that the arithmatic mean weight was 16.05 oz.
If he were to randomly select 120 corks from the next box, then how many of these corks would John expect to be undersized?
a. one set of 20 pairs of scores x and y values produces a correlation of r0.70. if ssy 150 find the standard error of
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