A lecturer claims that more than 60% of USP students have personal computer. A researcher wishes to test the claim and selects a random sample of 80 students. She finds that 57 have personal computer. At α = 0.01, should the lecturer’s claim be supported?

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A: We have to find test statistics and p value...

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A: Given :  A researcher conducts an independent-measures study comparing two treatments and reports…

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A:

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A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: A tire company claims that their new tires will have an average life of 122000 miles. A consumer…

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Q: The Critical Value for a two-tailed z-test with alpha = 0.01 would be O +/-1.96 +/-1.64 +/-2.33…

A: Note: Hi there! Thank you for posting the question. As your question has multiple questions, as per…

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A: The null and alternative hypotheses are;The null hypothesis states that the scores are unaffected by…

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:

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A: Correct answer is  (A)

Q: A simple random sample of size 200 is taken from a much larger group of male wrestlers prior to a…

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Q: A random sample of  n= 4 individuals is selected from a population with μ = 35, and a treatment is…

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Q: In the t-test of significance for the hypotheses Ho: μ = 11 and Haμ 11, the value of the test…

A: The t test is the type of parametric test. It used to test the mean significance between the sample…

Q: According to a certain government agency for a large country, the proportion of fatal traffic…

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Q: In a previous year, 61% of females aged 15 and older lived alone. A sociologist tests whether this…

A: np(1-p)= 400×0.6×0.4=96>10  Hence, the sample size is under 5%op population size and consider as…

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Q: A researcher obtains t= 2.25 for a repeated-measures study using a sample ofn=10 participants. Based…

A: It is given that t= 2.25. Df = n- 1 = 10-1 = 9.   For α = 0.05: It is given that α = 0.05, the area…

Q: A researcher conducts an independent-measure study comparing two treatments and reports the t…

A: Given Information:  t(25) = 2.071 here,  df = 25  t value = 2.071

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A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts(t obs, df…

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Q: 5. Out of random sample of n = 100 adult Americans who did not attend college, r, = 37 of them…

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A: ANSWER: For the given data,

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Q: In a previous year, 61% of females aged 15 and older lived alone. A sociologist tests whether this…

A: According to our guidelines we can answer only first question and rest can be reposted.

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Q: If the decision rule for a one-tailed test of hypothesis is given as: Reject Ho if z<-2.36. What…

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Q: 3) A certain country claims that their COVID-19 vaccine is more than 80% effective. In their…

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Q: In a previous year, 59% of females aged 15 and older lived alone. A sociologist tests whether this…

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Q: he test yielded a t-value of 3.34 with a corresponding p-value of 0.001. Which of the following is…

A: t-statistic = 3.34 p-value = 0.001

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.