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1. A study to compare two types of infant formula was run at two sites, one in Atlanta and the second in Denver. The study was run over a three-week period. Subjects at both sites were classified as dropouts if they left the study before the conclusion, or completers if they finished the study. The following table gives the number of dropouts and completers at each site. A chi-square test was performed and the result was X2 = 5.101 with P-value = 0.024.
The correct conclusion is
A. Atlanta had a greater dropout rate.B. Denver had a greater dropout rate.C. any differences can be explained by sampling variability.
2. A study was performed to examine the personal goals of children in grades 4, 5, and 6. A random sample of students was selected for each of the grades from schools in Georgia. The students received a questionnaire regarding personal goals. They were asked what they would most like to do at school: make good grades, be popular, or be good at sports. Results are presented in the table below by the sex of the child.
This is aA. 2 × 2 table.B. 2 × 3 table.C. 3 × 2 table.
A noted psychic was tested for ESP. The psychic was presented with 400 cards face down and asked to determine if each card was marked with one of four symbols: a star, cross, circle, or square. The psychic was correct in 120 cases. Let p represent..
Find out the probability
We want to know if his support has decreased. In computing a test of hypothesis with , what is the estimate of the overall proportion?
Conduct an analysis of variance
Answer all of these questions using R Commander. Include all graphs, outputs from R Commander.
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.
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
The student with the 92 found a grading error on her exam and her correct grade was 95. There were no other grading errors. After correcting this student's paper, the five number summary for the midterm exam will be
Find out optimal decision
The correct set of hypotheses to test the effect of the bonus plan, the difference between the t and z distributions
Suppose each employee in the company receives a $3000 raise for next year (each employee's salary is increased by $3000). The interquartile range of the salaries will
Which of the following would produce a new confidence interval with smaller width based on these same data and produce a new confidence interval
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