Part B: Researchers gave one group of people pills containing Vitamin C to take every day and gave another group of people similar pills, but without the Vitamin C. The researchers counted the number of people in each group who got a cold during the next year. Use the graph to estimate the numbers you need to answer the questions. 18000 16000 14000 12000 11000 10000 8000 7000 6000 4000 2000 0 Didn't Get Cold Got Cold Took Vitamin C Didn't Take Vitamin C Question 3 (8 points): About how many people who didn't take Vitamin C got a cold? Use the hint in #4. Answer:
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Look at the graph and find the section that represents people who didn't take Vitamin C and got a cold. Show more…
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'2) A study was conducted to determine the effectiveness of varying amounts of vitamin C in reducing the number of common colds_ A survey of 450 people provided the following information: Daily amount of vitamin C taken None 500 mg 1000 mg No colds 57 26 17 At least one cold 223 84 43 Find probability of no cold given 500 mg of vitamin C Find probability of being given at least 500 mg of vitamin C Find probability of at least one cold or at 1000 mg of vitamin C'
Cheng Z.
22 volunteers at a cold research institute caught a cold after having been exposed to various cold viruses. A random selection of 10 volunteers were given tablets containing 1 gram of vitamin C. These tablets were taken 4 times a day. The control group, consisting of the other 12 volunteers, was given placebo tablets that looked and tasted exactly like the vitamin C ones. The length of time the cold lasted was recorded. Treated with vitamin C placebo 5.5 6.5 6.0 6.0 7.0 8.5 6.0 7.0 7.5 6.5 6.0 8.0 7.5 7.5 5.5 6.5 7.0 7.5 6.5 6.0 8.5 7.0 Do the data prove that taking 4 grams of vitamin C daily reduces the time that a cold lasts at a 5% significance level? (assume equal variances) (30 points)
Madhur L.
A study was conducted to determine the effectiveness of varying amounts of vitamin C in reducing the number of common colds. A survey of 450 people provided the following information: Daily amount of vitamin C taken None 500 mg 1000 mg No colds 57 26 17 At least one cold 223 84 43 Is there evidence of a relationship between catching a cold and taking vitamin C?
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