7.S.6 A plant physiologist conducted an experiment to determine whether mechanical stress can retard the growth of soybean plants. Young plants were randomly allocated to two groups of 13 plants each. Plants in one group were mechanically agitated by shaking for 20 minutes twice daily, while plants in the other group were not agitated. After 16 days of growth, the total stem length (cm) of each plant was measured, with the results given in the accompanying table.73 Consider a t test to compare the treatments with the alternative hypothesis that stress tends to retard growth. Control Stress in 13 13 30.59 27.78 2.13 1.73 a. What is the value of the t test statistic for comparing the means? b. The P-value for the t test is 0.0006. If a = 0.01, what is your conclusion regarding Ho? 7.S.7 Refer to Exercise 7.S.6 O. Construct a 95% confidence interval for the population mean reduction in stem length. Does the confidence interval indicate whether the effect of stress is "horticulturally important," if "horticulturally important" is defined as a reduction in population mean stem length of at least а. 1 сm b. 2 cm с. 5 сm
7.S.6 A plant physiologist conducted an experiment to determine whether mechanical stress can retard the growth of soybean plants. Young plants were randomly allocated to two groups of 13 plants each. Plants in one group were mechanically agitated by shaking for 20 minutes twice daily, while plants in the other group were not agitated. After 16 days of growth, the total stem length (cm) of each plant was measured, with the results given in the accompanying table.73 Consider a t test to compare the treatments with the alternative hypothesis that stress tends to retard growth. Control Stress in 13 13 30.59 27.78 2.13 1.73 a. What is the value of the t test statistic for comparing the means? b. The P-value for the t test is 0.0006. If a = 0.01, what is your conclusion regarding Ho? 7.S.7 Refer to Exercise 7.S.6 O. Construct a 95% confidence interval for the population mean reduction in stem length. Does the confidence interval indicate whether the effect of stress is "horticulturally important," if "horticulturally important" is defined as a reduction in population mean stem length of at least а. 1 сm b. 2 cm с. 5 сm
Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
6th Edition
ISBN:9781337111348
Author:Bruce Crauder, Benny Evans, Alan Noell
Publisher:Bruce Crauder, Benny Evans, Alan Noell
Chapter5: A Survey Of Other Common Functions
Section5.3: Modeling Data With Power Functions
Problem 6E: Urban Travel Times Population of cities and driving times are related, as shown in the accompanying...
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