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# for a righttailed test for a twotailed

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Unformatted text preview: alities: © 2011 THE CARNEGIE FOUNDATION FOR THE ADVANCEMENT OF TEACHING A PATHWAY THROUGH STATISTICS, VERSION 1.6, STATWAY™  ­ STUDENT HANDOUT STATWAY™ STUDENT HANDOUT | 2 Lesson 10.3.1 Hypothesis Tests for Population Means !! :µ < ! For a left ­tailed test !! :µ > ! For a right ­tailed test !! :µ ≠ ! For a two ­tailed test 1 Let µ be the mean magnetic intensity for all monarch butterflies. A State the null and alternative hypotheses. B Is this a left ­tailed, right ­tailed, or two ­tailed test? Step 2: Collect the Data 2 A random sample of 16 butterflies was examined. The measured magnetic intensity of each butterfly is given below. Table: Magnetic Intensity of Monarch Butterflies (in pico ­emus) 486 124 328 219 532 264 323 490 173 145 122 75 366 402 298 290 A Determine the sample mean, sample standard deviation,...
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