1a local farmer is interested in comparing the yields of

Reference no: EM13353658

1. A local farmer is interested in comparing the yields of two varieties of tomatoes. In an experimental field, he selects 20 locations and assigns 10 plants from each variety at random to the locations. He determines the yield per plant (in pounds). The mean yield for plants of variety 1 was = 16.3 pounds with a standard deviation S1 = 3 pounds. The mean yield for plants of variety 2 was =18.4 pounds with a standard deviation S2 = 4 pounds. The standard error of the difference in sample means is

A. 2.10 pounds.
B. 2.50 pounds.
C. 1.58 pounds.

2. A local farmer is interested in comparing the yields of two varieties of tomatoes. In an experimental field, she selects 40 locations and assigns 20 plants from each variety at random to the locations. She determines the average per plant (in pounds). She computes a 95% confidence interval for the difference in mean yields between the two varieties using the two-sample t procedures with the resulting interval (2.13, 6.41). For testing using the two-sample t procedures we can say that

A. the P-value could be greater than 0.05.
B. the P-value must be less than 0.05.
C. no information about the P-value can be obtained without the test statistic.

3. A pediatrician is interested in studying the effect of motrin on reducing temperature in young children. Four children with influenza have their temperatures taken immediately before and then 45 minutes after taking a standard dose of motrin with the following results:

1346_The standard error of the difference in sample means1.png

A 95% confidence interval for the average reduction in temperature from using motrin is
A. 1.275 ± 1.572.
B. 1.275 ± 1.793.
C. 1.275 ± 1.326.

Reference no: EM13353658

Questions Cloud

1researchers compared two groups of competitive rowers a : 1.researchers compared two groups of competitive rowers a group of skilled rowers and a group of novices. the

1do students tend to improve their sat mathematics sat-m : 1.do students tend to improve their sat mathematics sat-m score the second time they take the test? a random sample of

1an srs of 20 third grade children is selected in chicago : 1.an srs of 20 third grade children is selected in chicago and each is given a test to measure their reading ability.

1a researcher wished to compare the average amount of time : 1.a researcher wished to compare the average amount of time spent in extracurricular activities by high school students

1a local farmer is interested in comparing the yields of : 1.a local farmer is interested in comparing the yields of two varieties of tomatoes. in an experimental field he

1a researcher wants to know if the average time in jail for : 1.a researcher wants to know if the average time in jail for robbery has increased from what it was several years ago

1an instructor wanted to construct a confidence interval : 1.an instructor wanted to construct a confidence interval for the mean gpa of the students in his class. he used the

1a radio station wants to know if residents in their area : 1.a radio station wants to know if residents in their area are in favor of a proposed tax increase. they invite

1i wish to find a 95 confidence interval for the mean : 1.i wish to find a 95 confidence interval for the mean number of times men change channels with a remote control during

User Account

All Pages