Your claim results in the following alternative hypothesis: Ha : p > 38% which you test at a significance level of α=.10 Find the critical value, to three decimal places. zα = ________
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Your claim results in the following alternative hypothesis:
Ha : p > 38%
which you test at a significance level of α=.10
Find the critical value, to three decimal places.
zα = ________
Step by step
Solved in 2 steps
- a. Which of the two excel outputs above is the correct result of the data?b. What is the appropriate set of hypotheses for this test?c. From the given results above, which test is appropriate to test the significant difference between the heat-producing capacities of the coal from the mines?d. What is the t- critical value?e. What is the p-value?f. At α=0.05, what is the correct decision?If the value of Cronbach’s alpha is 0.07, it means ___________; a. Research instrument is not reliable b. Research instrument is internally consistent c. Data is reliable d. Data is internally consistentThe test statistics of z = -1.27 is obtained when testing the claim that μ ≠ 35.4. Use the significance level of α=0.05 to find the critical value(s).
- If the df value for a two tailed test with alpha =0.05 were to increase from df=5 to df=22,what would happen to the critical values for t?Your claim results in the following alternative hypothesis:Ha : p ≠≠ 85%which you test at a significance level of α=.02Find the positive critical value, to three decimal places.zα/2Arandom sample of 450 observations produced a sample proportion equal to 0.38. Find the critical and observed values of z for the following test of hypotheses using alpha = 0.025 . H 0 :p=0.30 versus H 1 :p not equal to 0.30
- For the situation described below, state the null and alternative hypotheses to be tested. (Enter != for ≠ as needed.) A new variety of pearl millet is expected to provide an increased yield over the variety presently in use, which has a mean yield of about 55 bushels per acre.Your claim results in the following alternative hypothesis:Ha : p << 15%which you test at a significance level of α=.01α=.01.Find the critical value, to three decimal places.Your claim results in the following alternative hypothesis:Ha : μ ≠≠ 135which you test at a significance level of α=.001α=.001.Find the positive critical value, to three decimal places.zα/2 = Submit QuestionQuestion 2
- The average effect size in social psychology is around d = 0.21. Conventionally, a sample over 30individuals is considered 'large.' If we are running an experiment for which we will perform atwo-tailed test t-test and we have 30 individuals in each of the two conditions, what is ourpredicted power? (use the standard alpha)The test statistic of z= -1.90 is obtained when testing the claim that p<0.26. a. Using a significance level of a=0.01, find the critical value(s). b. Should we reject Upper H 0 or should we fail to reject Upper H 0?As we have noted in previous chapters, even a very small effect can be significant if the sample is large enough. Suppose, for example, that a researcher obtains a correlation (computed from the raw data) of r = 0.60 for a sample of n = 10 participants. (4 pts. total) Is this sample sufficient to conclude that a significant correlation exists in the population? Use a two-tailed test with α = .05. In your response, be sure to specify the critical value for r.