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A NEW METHOD OF STORING SNAP PEAS IS BELIEVED TO RETAIN MORE ASCORBIC ACID THAN AN OLD METHOD

A NEW METHOD OF STORING SNAP PEAS IS BELIEVED TO RETAIN MORE ASCORBIC ACID THAN AN OLD METHOD

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Author: Christine Farr
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A new method of storing snap peas is believed to retain more ascorbic acid than an old method. Inan experiment, snap peas were harvested under uniform conditions and frozen in 62 equal-sizepackages. Thirty five of these packages were randomly selected and stored according to the newmethod and the other thirty two packages were stored by the old method. Subsequently, ascorbic aciddeterminations were made, and the following summary statistics were calculated.New method Old methodMean 449 440St. dev. 19 45Sample size 35 32Estimate the difference in ascorbic acid concentrations between the two groups with 95% confidence.a. Determine if the problem is either a test of hypothesis, a confidence interval or something else andspecify the ‘key words’ found in the problem that demonstrate your choice.b. Determine the procedure name and parameters involved for each problem (use the Stat 200 Formulasand Techniques Summary document.) Specify the ‘key words’ found in the problem that lead you tothis choice.c. If the problem is a hypothesis test, indicated if it has a lower-tail, upper-tail, or two-tail alternativehypothesis as well as the test statistic formula for the test. If the problem is a confidence interval thenindicate the formula used for the margin of error.You DO NOT need to do the ACTUAL test of hypothesis, confidence interval, etc. in order to submit inthe dropbox, just answer parts a, b, and c for the problem.4. A study is to be made of the relative effectiveness of two kinds of cough medicines in increasingsleep. Six people with colds are given medicine A the first night and medicine B the second night.Their hours of sleep each night are recorded.

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