When the P - value is equal to the alpha level, the null hypothesis should be accepted.
Q: A small P-value for a test of significance is: evidence against the null hypothesis. evidence for…
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Q: Find the critical values for (a) A left-tailed test with a=0.15 (b) A two-tailed test with a= 0.03
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Q: Define and explain Type I and Type II errors and relate each to the selection of an alpha level.
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Q: If we have a sample of size 100 with sample mean breaking strength of 1050 pounds from a population…
A: Sample size (n)=100 Mean breaking strength (x¯) = 1050 pounds Standard deviation (σ) = 200 pounds…
Q: when we will be reject the NULL HYPOTHESIS on the basis of
A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…
Q: Why would you use a low alpha? To minimize the probability to make a Type I error To minimize the…
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Q: Using the p-value method, we reject the null hypothesis if the p-value is ___________than or equal…
A: NOTE When p-value≤α=level of significance, then we reject the null hypothesis. When…
Q: If the p-value is greater than alpha, we will. reject the null hypothesis and accept the alternative…
A: If the P-value is greater than alpha, we do not have sufficient evidence to reject the null…
Q: Assume that MLR1-6 hold. For a two-sided alternative hypothesis test, we can say that the…
A: Assume that MLR1-6 hold. Here two-sided alternative hypothesis test.
Q: If other factors are held constant, explain how increasing the number of scores in each sample…
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Q: The P-value for this hypothesis was found to be:
A: The test statistic is, z=x¯-μσn=78-682025=104=2.5 The test statistic is 2.5.
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A: In ANOVA we have to test that our factor has significant effect on response or not.
Q: What are the critical t values for a one tailed hypothesis test with alpha=0.01 and a sample of n=30…
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Q: . Is there sufficient evidence at the 0.05 level of significance that the average years of…
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Q: What is the critical value of a two-sided paired t test with ? = 0.05 and ? = 25?
A: Given that, Sample size n=25 Level of significance α=0.05
Q: Is this a valid experimental design?
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Q: An alpha level of 0.05 means that 99% of the means are likely to reflect the null hypothesis. True…
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Q: Under what circumstances can you use a z-test instead of a t-test to compare a sample against a…
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Q: It is easier to reject the null hypothesis if the researcher uses a smaller alpha (α) level. choose…
A: We know that, Type I error is – In this we reject the null hypothesis which is actually true called…
Q: What is the critical value for a two sided t-test with an alpha = .05, and degrees of freedom = 60?
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Q: If the value of the observed test statistic falls in the rejection region, the alternative…
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Q: The type II error is also known as false positive or false alarm. Wrongfully failing to reject the…
A: Here use type 2 error definition
Q: If we have a sample of size 100 with sample mean breaking strength of 975 pounds from a population…
A: Hypothesis to be tested: H0:μ=1000H1:μ<1000
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A: Express the hypothesis test H0:p=35H1:p≠35 Given that, z=0.78. The probability curve of the required…
Q: What is the critical t score if you are testing a two-tailed hypothesis with df = 44? (α level of…
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Q: Imagine that your null hypothesis is σ2 = 10 and your alternative hypothesis is σ2 > 10. What is…
A: It is given that the test is right-tailed. Level of significance is 0.05. Degrees of freedom is 12–1…
Q: What is the critical value for a two sided t-test with an alpha = .02, and degrees of freedom = 29?
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Q: If a sample is an extreme result and is significant, it will fall in the critical region which…
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A: Given,sample size (n)=25sample mean(x)=1922.76standard deviation(s)=350.8991α=0.05
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A: I am sorry for your Inconvenience. Please go through the following explanation. In hypothesis tests,…
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A: regression coefficient for X is β here confidence level = 99% so significance level = 1%
Q: Formulate the null and alternative hypothesis and identify the type of test. Tge manufacturer if a…
A: Given: μ= average nicotine content=2.5
Q: If we have a sample of size 100 with sample mean breaking strength of 975 pounds from a population…
A: Given: n=100x¯=975s=200μ0=1000 The significance level is taken as 0.05.
Q: Which of the following relates to the acceptance of the null hypothesis when it is actually false?…
A: Type I error - It is the error caused by rejecting a null hypothesis, when it is actually true. Type…
Q: What type of hypothesis test should be performed? Select What is the test statistic? Ex: 0.12 : Does…
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Q: Can I use CRONBACH’S ALPHA in testing the reliability of the device? How?
A: CRONBACH's Alpha: It is a measure of internal consistency. Cronbach alpha can be considered as a…
Q: A large p-value indicates that the data is consistent with the alternative hypothesis. True or…
A: The p-value is the likelihood of obtaining the value of sample statistic which would be as extreme…
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Q: a. If a null hypothesis is rejected with a significance level of 0.05, is it also rejected with a…
A: To be reject null hypothesis, p value must be smaller than alpha.
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- What is an experiment?It is easier to reject the null hypothesis if the researcher uses a smaller alpha (α) level. choose True or False?The clinical trial for a new drug results in a p-value of 0.045. What decision should the scientists make? We reject the null hypothesis that the drug doesn't work. We accept the null hypothesis that the drug doesn't work. We reject the alternative hypothesis that the drug does work. We accept the alternative hypothesis that the drug does work.
- The clinical trial for a new drug results in a p-value of 0.15. What decision should the scientists make? We accept the alternative hypothesis that the drug does work. We reject the alternative hypothesis that the drug does work. We accept the null hypothesis that the drug doesn't work. We cannot reject the null hypothesis that the drug doesn't work.A random sample of n₁ = 16 communities in western Kansas gave the following rates of hay fever per 1000 population for people under 25 years of age. 121 115 124 99 134 121 110 116 113 96 116 116 135 96 96 116 A random sample of n₂ = 14 communities in western Kansas gave the following rates of hay fever per 1000 population for people over 50 years old. 113 86 106 102 113 94 94 108 103 99 78 105 88 100 Assume that the hay fever rate in each age group has an approximately normal distribution. Using the method outlined in Brase and Brase, do the data indicate that the age group over 50 has a lower rate of hay fever? Use a = 0,05. Do you reject or fail to reject the null hypothesis? Are the data statistically significant at the α = 0.05 level of significance?Find the P-value of z-score (3.55) if doing a two-tail hypothesis test.
- A researcher is testing a two-tailed null hypothesis at the p < .01 level with df = 48. What critical value would she or he use? Justify your answer.A researcher selected a sample of 268 former student athletes from a list of graduates of a large university. A total of 14% of the sample of athletes had earned graduate degrees as compared to 17% of all graduates. Is the difference statistically significant? Use α=.01. Be sure to use the five-step model in conducting the hypothesis test.The P-value for a hypothesis test is P = 0.034. Do you reject or fail to reject H 0 when the level of significance is α = 0.01?
- HR department wants to make sure that their hiring practices are independent of gender. In other words, they want to ensure that both men and women have an equal chance of being hired. The observed data related to this survey is summarized in the following table: Observed frequency Male Female Total Hired 45 35 Not Hired 32 28 Total Given Ho = “HR department hired male and female employees equally”, decide whether to reject or fail to reject the null hypothesis (α = 0.05).Based on this information, give us the t statistic for the sample and the standardized effect size of the hypothesis test. Then tell if we should reject or fail to reject the null hypothesis.