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Applied in a field research please help

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Reference no: EM132079453

What do lecturers mean when the refer to systematic sampling and how can it be exactly applied in a field research please help

Reference no: EM132079453

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Basic Statistics Questions & Answers

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Assuming that the seedlings chosen are taken from a population which is normally distributed, determine a 95% confidence interval.

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On an exam with scores that followed a normal distribution, a student's z-score was 2. What percentage of students scored worse than he did?

  Sample distribution for discrete random variables

A discrete random variable Y takes the value -1, 0 and 1 with probabilities 1/2θ, 1- θ and 1/2θ respectively. Let Y1 and Y2 be two independent random variables, each with the same distribution as Y.

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the ages and heights of a sample of child smokers were taken. the average age was 13.5 years with an sd of 2.3 years.

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Create a 95 % confidence interval for the true mean. Why might normality be the issue here?

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What are the ethical implications if the manufacturer of Brand A toothpaste asked you to survey only its employees?

  Random and volunteer samples

Some television stations attempt to gauge public opinions by posing a question on the air and asking viewers to call to give their opinions.

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One of the oldest and most respected survey research firms is the Gallup Organization. This organization makes a number of special reports available.

  Finding values symmetrically distributed around mean

95% of breaking strengths will be contained between what two values symmetrically distributed around mean?

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Explain why you think the conclusion is not justified. Describe the types of bias that may be present.- Reword the question in a way that you think might create a more positive response.

  Determine the critical value for hightailed test

Using the z table in Table E of Appendix C, determine the critical value for the hightailed test with a = 0.035.

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