A new method of storing snap peas is believed to retain more ascorbic acid than an old method.
3. 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.Subject123456Medicine A 4.8 4.1 5.8 4.9 5.3 7.4Medicine B 3.9 4.2 5.0 4.2 5.4 7.0Is there a significance difference in the amount of sleep when switching from medicine A tomedicine B at the 5% significance level?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 justanswer parts a b and c of the problem.5. Government officials near a nuclear power plant have been working on an emergency preparednessprogram. In 2004 a random sample of 405 community residents was obtained and 275 said they wereconfident they would be notified quickly of a radioactive incident. In 2005 after the program started arandom sample of 378 community residents was obtained and 210 felt they were confident they wouldbe notified quickly of a radioactive incident. At the 5% significance level is there evidence that the trueproportion of residents who were confident they would be notified quickly of a radioactive incident in2005 is greater than in 2004.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 justanswer parts a b and c for the problem.6. The following table shows the amount spent on business lunches for twelve senior executives at alarge corporation. Is there evidence at a .05 significance level that there is a difference in amountspent determined by corporation title?Chief Financial Officer$49$58$44$42Chief Executive Officer$50$55$46$61Chief Administrative Office $38$45$32$43a. 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 Formula andTechnique Summary document.) Specify the key words found in the problem that lead you to thischoice.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 post in thediscussion board just answer a b and c for the board.
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