The test statistics for a left tailed test is z 1 42 solve for the p value

    • [PDF File]The Z-test - University of Washington

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      Since our p-value of 0.3472 is greater than 0.05, we fail to reject H0 and state that: The IQ of superb drug patients (M = 97.65) is not signi cantly di erent than 100, z=-0.94, p = 0.3472. To do this in R, we need to be sure to double our p-value since this is a two-tailed test. Here’s how to calculate the p-value in one step.

    • Stats: Test 3 Review MULTIPLE CHOICE. Choose the one ...

      1)Given H0: p ≥ 80% and Ha: p < 80%, determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. A)two-tailed B)right-tailed C)left-tailed 1) 2)A researcher claims that 62% of voters favor gun control. Determine whether the hypothesis test for this claim is left-tailed, right-tailed, or two-tailed.

    • [PDF File]Using Your TI-83/84/89 Calculator for Hypothesis Testing ...

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      most situations. 5. Go back and conduct the 1-proportion z test again, but select Draw this time and press e. This option will generate a graph of the normal curve with the area corresponding to the P-value shaded in.It also reports the z-test statistic and its associated P-value.The Draw option is useful for reminding

    • [PDF File]Stat 210 Practice Exam Three (proportions) I

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      Use the given information to find the P-value. 7) The test statistic in a left-tailed test is z = -1.83. A) 0.0672 B) 0.0672 C) 0.0336 D) 0.9664 7) Solve the problem. Round the point estimate to the nearest thousandth. 8) 22 randomly picked people were asked if they rented or owned their own home, 9 said they

    • [PDF File]Using the TI-83/84 Plus Chapter 9: Hypothesis Testing ...

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      5.It gives you the test statistic (z) and the P-value for the test statistic (p) based on your choice of two-tailed, left-tailed, or right-tailed test (so make sure you entered that correctly). Warning: The P-value may be given in scienti c notation. For example 2.143 E 6 = 2.143 10 6 = 0.000002143.

    • [PDF File]Practice Final Exam Questions (2) -- Answers

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      a. A significance test for comparing two means gave t=−1.97 with 10 degrees of freedom. Can you reject the null hypothesis that the μ’s are equal versus the two-sided alternative at the 5% significance level? Answer: Probability for t = -1.97 for df = 10 is between 0.025 and 0.05. So for two-sided test, the p- value is between 0.05 and 0.1.

    • [PDF File]Example 1 - WPMU DEV

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      z. 0 = -0.90 - z = - 1.645 For a left-tailed test, if z. 0 < - z we reject the null hypothesis (see summary in blue box below). -0.90 > -1.645 our critical value is GREATER than our test statistic, so we do not reject the null hypothesis. Summary of what we just did (look at left side for “classical approach”):

    • Review for Final Exam MULTIPLE CHOICE. Choose the one ...

      Solve the problem. 1)The owners of an industrial plant want to determine which of two types of fuel (gas or electricity) ... Suppose the test statistic turned out to be z = -1.20 (not the correct value). Find a two-tailed p-value for this test statistic. A).3849 B).6151 C).2302 D).1151 12) 2. 13)If a data set is normally distributed, what is ...

    • [PDF File]Hypothesis testing for - University of California, Los Angeles

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      p value = 2P(X> 36) = 2P(Z>1:4) = 2(1 0:9192) = 0:1616: Again, using the p value H 0 is not rejected. Example 4 A manufacturer claims that 20% of the public preferred her product. A sample of 100 persons is taken to check her claim. It is found that 8 of these 100 persons preferred her product. a. Find the p-value of the test (use a two-tailed ...

    • [PDF File]PROBLEM SET 1 - WOU

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      1: μ

    • [PDF File]Section 8-1 Pg. 410 Exercises 12,13 12.

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      5. Health Care Expenses The mean annual expenditure per 25- to 34-year-old consumer for health care is $1468. This includes health insurance, medical services, and drugs and medical supplies. Students at a large university took a survey, and it was found that for a sample of 60 students, the mean health care

    • [PDF File]Statistics: Hypothesis Testing

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      For a left-tail test, simply locate the P-value corresponding to the z-score. For a right-tail test, the P-value found in the table should be subtracted from 1. For a two-tailed test, multiply the P-value found in the table by 2. E. Compare the z-score to the P-value. This example problem is a left-tailed test, and the P-value, when rounded to ...

    • [PDF File]Introductory Statistics Hypothesis Testing Review ...

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      Determine the critical value(s) for a one-mean z-test. 1) A left-tailed test with α = 0.02 . A) ±1.96 B) ±2.054 C) -1.96 D) -2.054 1) Solve the problem. 2) A revenue department is under orders to reduce the time small business owners spend filling out pension form ABC-5500. Previously the average time spent on the form was 6.3 hours. In order to

    • MATH 1342 TEST ON CHAPTERS 8 TIME HRS. MULTIPLE CHOICE ...

      Determine whether the hypothesis test for this is left-tailed, right-tailed, or two-tailed. A) right-tailed B) two-tailed C) left-tailed 20) 21) Suppose you are using α = 0.05 to test the claim that μ≠39 using a P-value. You are given the sample statistics n = 35, x = 38.1, and s = 2.7. Find the P-value.

    • [PDF File]MATH 227 CP 9 SHORT ANSWER. Write the word ... - MATHEMATICS

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      Find the value of the test statistic z using z = p - p pq n. 9) The claim is that the proportion of accidental deaths of the elderly attributable to ... The test statistic in a two - tailed test is z = - 1.63. 11) 12) The test statistic in a left - tailed test is z = - 1.83. 12) 13) With H 1 : p J 3 /5 , the test statistic is z = 0.78 . 13)

    • [PDF File]STATISTICS/GRACEY EXAM 3 PRACTICE/CH. 8 9

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      6) α = 0.05 for a two-tailed test. A) ±1.96 B) ±2.575 C) ±1.645 D) ±1.764 6) Use the given information to find the P-value. Also, use a 0.05 significance level and state the conclusion about the null hypothesis (reject the null hypothesis or fail to reject the null hypothesis). 7) With H1: p ≠ 3/5, the test statistic is z = 0.78.

    • [PDF File]CHAPTER 8: Hypothesis Testing

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      For a left-tailed test, use the z value that corresponds to the area equivalent to in Table E, i.e., z 1 , the percentile of the distribution. For a right-tailed test, use the z value that corresponds to the area equivalent to 1 in Table E, i.e., z , the percentile of the distribution.

    • [PDF File]Find p-values with the Ti83/Ti84 - San Diego Mesa College

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      3. Chi-Square table p-values: use choice 8: χ2cdf ( The p-values for the χ2-table are found in a similar manner as with the t- table. The calculator will expect χ2cdf (loweround, upperbound, df). a. Left-tailed test (H1: σ < some number) Let our test statistic be χ2 =9.34 with n = 27 so df = 26. The p-value would be the area to the left of the test statistic or to the left of

    • [PDF File]MCQ TESTING OF HYPOTHESIS MCQ 13.1 (a) Hypothesis MCQ 13.2 ...

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      The choice of one-tailed test and two-tailed test depends upon: (a) Null hypothesis (b) Alternative hypothesis (c) None of these (d) Composite hypotheses MCQ 13.16 Test of hypothesis Ho: µ = 50 against H 1: µ > 50 leads to: (a) Left-tailed test (b) Right-tailed test (c) Two-tailed test (d) Difficult to tell MCQ 13.17

    • [PDF File]Using the TI-83/84 Plus Chapter 8: Hypothesis Testing ...

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      0), left-tailed (prop p 0). 4.Highlight Calculate and hit ENTER 5.It gives you the test statistic (z) and the P-value for the test statistic (p) based on your choice of two-tailed, left-tailed, or right-tailed test. Warning: The P-value may be given in scienti c notation. For example 2.143 E 6 = 2.143 10 6 = 0 ...

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