a. Explanation Given info: The standard deviation of a random sample of 60 radish plants’ germination times was 6 days. Justification: Here, the claim is that the standard deviation of the germination time of radish seeds is 8 days... b. To determine To find: The critical value. c. To determine To find: The test value. d. To determine To make: The decision. e. To determine To summarize: The result.

Elementary Statistics: A Step By Step Approach

10th Edition

ISBN: 9781259755330

Author: Allan G. Bluman

Publisher: McGraw-Hill Education

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Chapter 8, Problem 30CQ

To determine

To state: The hypotheses and define the claim.

To determine

To find: The critical value.

To determine

To find: The test value.

To determine

To make: The decision.

To determine

To summarize: The result.

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Chapter 8, Problem 29CQ

Chapter 8, Problem 31CQ

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3. Explain why the following statements are not correct. a. "With my methodological approach, I can reduce the Type I error with the given sample information without changing the Type II error." b. "I have already decided how much of the Type I error I am going to allow. A bigger sample will not change either the Type I or Type II error." C. "I can reduce the Type II error by making it difficult to reject the null hypothesis." d. "By making it easy to reject the null hypothesis, I am reducing the Type I error."

Given the following sample data values: 7, 12, 15, 9, 15, 13, 12, 10, 18,12 Find the following: a) Σ x= b) x² = c) x = n d) Median = e) Midrange x = (Enter a whole number) (Enter a whole number) (use one decimal place accuracy) (use one decimal place accuracy) (use one decimal place accuracy) f) the range= g) the variance, s² (Enter a whole number) f) Standard Deviation, s = (use one decimal place accuracy) Use the formula s² ·Σx² -(x)² n(n-1) nΣ x²-(x)² 2 Use the formula s = n(n-1) (use one decimal place accuracy)

Table of hours of television watched per week: 11 15 24 34 36 22 20 30 12 32 24 36 42 36 42 26 37 39 48 35 26 29 27 81276 40 54 47 KARKE 31 35 42 75 35 46 36 42 65 28 54 65 28 23 28 23669 34 43 35 36 16 19 19 28212 Using the data above, construct a frequency table according the following classes: Number of Hours Frequency Relative Frequency 10-19 20-29 |30-39 40-49 50-59 60-69 70-79 80-89 From the frequency table above, find a) the lower class limits b) the upper class limits c) the class width d) the class boundaries Statistics 300 Frequency Tables and Pictures of Data, page 2 Using your frequency table, construct a frequency and a relative frequency histogram labeling both axes.

Chapter 8 Solutions

Elementary Statistics: A Step By Step Approach

Ch. 8.1 - Applying the Concepts 81 Eggs and Your Health The...Ch. 8.1 - Define null and alternative hypotheses, and give...Ch. 8.1 - What is meant by a type I error? A type II error?...Ch. 8.1 - What is meant by a statistical test?Ch. 8.1 - Explain the difference between a one-tailed and a...Ch. 8.1 - What is meant by the critical region? The...Ch. 8.1 - What symbols are used to represent the null...Ch. 8.1 - What symbols are used to represent the...Ch. 8.1 - Explain what is meant by a significant difference.Ch. 8.1 - When should a one-tailed test be used? A...

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To state: The hypotheses and define the claim.

Solution Summary: The author states that the standard deviation of a random sample of 60 radish plants' germination times was 6 days. The null hypothesis indicates the claim.

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To state: The hypotheses and define the claim.

To find: The critical value.

To find: The test value.

To make: The decision.

To summarize: The result.

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Chapter 8 Solutions