Find the critical value(s) for a left-tailed z-test with α=0.09. The critical value(s) is(are) ___
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Find the critical value(s) for a left-tailed z-test with α=0.09.
The critical value(s) is(are) ___
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- State the H0 (null Hypothesis) and H1 (Claim, Alternative Hypothesis). Identify the claim. Determine whether the test is either left, right or two tailed tests. Show in the sketch of graph. Find the critical value Zα and label on the graph. This is the reject H0 Calculate the test statistic. Make our decision about H0. Interpret the decision. It is claimed that the mean age of the old folks’ home is 75 years old. α = 0.05, = 73.6, σ = 3.1 and n=802bA real estate company is interested in testing whether the mean time that families in Gotham have been living in their current homes is less than families in Metropolis. Assume that the two population variances are equal. A random sample of 100 families from Gotham and a random sample of 150 families in Metropolis yield the accompanying data on length of residence in current homes. Suppose α=0.10. Which of the following represents the result of the relevant hypothesis test? Gotham: XG=35 months, S2G=900 Metropolis: XM=50 months, S2M=1050 A. The alternative hypothesis is rejected. B. The null hypothesis is rejected. C. The null hypothesis is not rejected. D. Insufficient information exists on which to decide.
- Let X be a random variable with mean u= E(X) = 10.33 and variance o = 12.81. Determine: E{10- E 10- 4You are performing a right-tailed test.If α=.01α=.01, find the critical value, to three decimal places.zα =Suppose for a sign test, there are 8 plus signs, 3 negative signs and 1 zero. A. What would be the test statistic? B. What would be the critical value for a one tailed test at α α =0.05?
- You are performing a left-tailed matched-pairs test with 11 pairs of data.If α=.01, find the critical value, to two decimal places.A tire store advertises that the average price of a new set of their tires is only $150. One of their recent customers believes their advertised average is too low – that the true mean price for a set of tires exceeds $150. He plans to carry out a hypothesis test at α = 0.05. In order to perform the test, the customer took an SRS of 8 sets of tires recently sold. The mean of these sets of tires was x̅ = $156.90 and the standard deviation was s = $11.80. a)What are the appropriate null and alternative hypotheses for this test? H0: x̅ = 150 vs. Ha: x̅ < 150 H0: μ = 150 vs. Ha: μ > 150 H0: x̅ = 150 vs. Ha: x̅ > 150 H0: μ = 150 vs. Ha: μ < 150 b)Are the conditions of randomness and normality met for this test? How? c)What are the appropriate degrees of freedom for this test? d)What is the value of the t test statistic for this test? e)Suppose the value for the t test statistic is t = 1.79. What is the p-value for a one-sided test?Suppose x values are: 0, 1, 2, 3, p(x) = 0.46, 0.28, 0.14, 0.12 and u= 0.92 Compute the variance for x values. 3D0.46,0.28, 0.14, 0.12 and %3D