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Get Lesson 2 1 Practice A Significance Of Experimental Results

Name Date Class LESSON 8-4 Practice B Significance of Experimental Results Use the information below to answer the questions. 1. A school is testing whether a new curriculum is successful in raising final exam scores. The data show the scores of the classes that were taught with the new curriculum the test group and the classes that continued to use the old curriculum the control group. Name Date Class LESSON 8-4 Practice B Significance of Experimental Results Use the information below to answer the questions. 1. A school is testing whether a new curriculum is successful in raising final exam scores. The data show the scores of the classes that were taught with the new curriculum the test group and the classes that continued to use the old curriculum the control group. Control Test a* State the null hypothesis for the experiment. b. Compare the results for the control group and the test group* Is there enough evidence to reject the null hypothesis 2. A school claims that a new curriculum will increase the average test score to 90. In a random sample of 25 students that were taught with the new curriculum the average test score was 88 with a standard deviation of 4 points. Find the z-value rounded to the nearest tenth. a* z-score b. Is there enough evidence to reject the school s claim about test scores 3. A company manufactures rubber balls. The company claims its product bounces twice as high as its leading competitor s product. In an experiment bounce height is measured in feet. The results of seven Company trials are shown in the Competitor table. 4. The company claims that its new rubber ball will raise the average bounce height to 5 feet. In a new trial 9 balls were tested and the average bounce was 4. 5 feet with a standard deviation of 1 foot. Find the z-value. Original content Copyright by Holt McDougal* Additions and changes to the original content are the responsibility of the instructor. 1. A school is testing whether a new curriculum is successful in raising final exam scores. The data show the scores of the classes that were taught with the new curriculum the test group and the classes that continued to use the old curriculum the control group. Control Test a* State the null hypothesis for the experiment. b. Compare the results for the control group and the test group* Is there enough evidence to reject the null hypothesis 2. Control Test a* State the null hypothesis for the experiment. b. Compare the results for the control group and the test group* Is there enough evidence to reject the null hypothesis 2. A school claims that a new curriculum will increase the average test score to 90. In a random sample of 25 students that were taught with the new curriculum the average test score was 88 with a standard deviation of 4 points. A school claims that a new curriculum will increase the average test score to 90. In a random sample of 25 students that were taught with the new curriculum the average test score was 88 with a standard deviation of 4 points. Find the z-value rounded to the nearest tenth. a* z-score b. Is there enough evidence to reject the school s claim about test scores 3.

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