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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:
A 95% confidence interval for the average reduction in temperature from using motrin isA. 1.275 ± 1.572.B. 1.275 ± 1.793.C. 1.275 ± 1.326.
Solve the mean and standard deviation equations
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Ten students were sampled at random from a student population. Each was asked how many courses he or she was planning on studying in the upcoming year. The following is a list of the reported data values: 1, 2, 2, 3, 4, 5, 5, 5, 5, 6 What is the vari..
The accompanying two histograms represent the distribution of acceptance rates (percent accepted) among 25 business schools in 1995. The histograms use different class intervals, but are based on the same data. In each class interval, the left endpoi..
Draw two pie charts, which allow the total yearly exports to be compared. Explain the trend in the export of fish as shown in the two pie charts.
What is the P-value of the test, assume the standard deviation is 3 years, a 95% confidence interval for the average time
Plan the scatter diagram
Basic Statistics problem
Use the list of random digits below to assign 4 men and 2 women to the shark fin treatment. Read the table from left to right, first selecting the 4 men and then the 2 women. Use the numerical labels given in the chart to the names.
MATH1550H: Assignment: Question: what is the least number of applicants that should be interviewed so as to have at least 50% chance of finding one such secretary?
MATH1550H: Assignment: Questions: Let’s assume the department of Mathematics of Trent University has 11 faculty members. For i = 0; 1; 2; 3; find pi, the probability that i of them were born on Canada Day using the binomial distributions.
Which of the following measures only the strength of a relationship?
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