In a study to measure the effect of an herbicide on the phosphate content of bean plants, asample of 75 plants treated with the herbicide had a mean phosphate concentration (in percent)of 3.52 and a standard deviation of 0.41, and 100 untreated plants had a mean phosphate concentration of 5.82 with a standard deviation of 0.52. a) Construct a 98% confidence interval for the difference in mean phosphate concentration between the treated plants and the untreated plants. b) Does it appear that the treatment is useful in reducing the phosphate concentration in bean plants? Explain
In a study to measure the effect of an herbicide on the phosphate content of bean plants, asample of 75 plants treated with the herbicide had a
concentration of 5.82 with a standard deviation of 0.52.
a) Construct a 98% confidence interval for the difference in mean phosphate concentration
between the treated plants and the untreated plants.
b) Does it appear that the treatment is useful in reducing the phosphate concentration in bean
plants? Explain.
Given,
In a study to measure the effect of an herbicide on the phosphate content of bean plants, a sample of 75 plants treated with the herbicide had a mean phosphate concentration (in percent)of 3.52 and a standard deviation of 0.41, and 100 untreated plants had a mean phosphate concentration of 5.82 with a standard deviation of 0.52.
That is,
n1=75
x1=3.52
s1=0.41
n2=100
x2=5.82
s2=0.52
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