What would be the minimum sample size should I generate to be able to detect a linear correlation coefficient of at least .70 with at least an 85% likelihood of correct detection with a type I error rate of .01?

Q: A certain printing press is known to turn out an average of 45 copies a minute. In an attempt to…

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Q: Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of these gears…

A: Given that, A random sample of 10 gears from supplier 1 results in x₁ = 290 and s₁ = 12, and another…

Q: Regarding the SPSS output of an Independent Samples t test, if Levene’s Test for Equality of…

A: It is given that, if Levene’s test for equality of variance is significant. That is, the variances…

Q: In testing for the equality of two population variances, when the populations are  normally…

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Q: At a .01 significance level with a sample size of 20, find the critical value for the correlation…

A: The level of significance is 0.01 and the sample size is 20.

Q: You have an independent-measures study where your sample size for both treatment groups is n = 9.…

A: Given, SS1=546, n1=n2=9, SS2=606M1=80, M2=72 Pooled Variance=SP2=SS1+SS2n1+n2-2=546+6069+9-2=72

Q: A bolt manufacturer makes a type of bolt to be used in airtight containers. The manufacturer claims…

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Q: The data from an independent-measures research study produce a sample mean difference of 4 points…

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Q: ANOVA is a one-tailed test and we are concerned only with those outcomes in which there is more…

A: Based on the concept of ANOVA, there is more variance between categories than within categories.

Q: We use the Durbin-Watson d test to determine if there exists serial correlation problem. Which of…

A: Given information: The information about Durbin – Watson test statistic is given.

Q: For any scenario in which an independent-samples t-test can be used, a one-way ANOVA can be used as…

A: Since both the tests are used to compare the mean response. The only difference is that we use…

Q: Previous record has indicated that the breaking strength of cables used in textile industries is…

A: Given, Cables 250 225 190 188 210 210 198 230 233 231

Q: At a .01 significance level with a sample size of 80, find the critical value for the correlation…

A: Given: Sample size: n =80 Level of significance: α=0.01

Q: The standard z-value of an arbitrary 16- unit sample from the normal-class population with a mean of…

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Q: For a lower tail hypothesis test with a sample size of 13 and a .10 level of significance, the…

A: From the provided information, Sample size (n) = 13 Level of significance (α) = 0.10 The test is…

Q: Suppose that 90 of 100 patients who enter hospital A with a particular ailment recover, while 160 of…

A: Given data: Number of patients who enter hospital A, n1=100 Out of 100, number of patients who enter…

Q: normally distributed with a variance of o². 6.68, 6.66, 6.62, 6.72, 6.76, 6.67, 6.70, 6.72, 6.78,…

A: Given6.68,6.66,6.62,6.72,6.76,6.67,6.70,6.72,6.78,6.66sample size(n)=10

Q: For a two-tailed hypothesis test evaluating a Pearson correlation, what is stated by the null…

A: We test the population parameter in the hypothesis testing.

Q: For a sample of n = 25 pairs of scores, what is the critical value for a Pearson's correlation using…

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Q: State the statistical hypotheses against a population with a mean of 90 for a one-tailed test where…

A: Given: μ=90 The hypotheses for testing the population mean is given bellow: Null hypothesis: H0:…

Q: Find the critical value for a test for correlation with α = 0.01 for a sample size of 30.

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Q: When conducting a significance test for correlation, if your null and alternative hypothesis are:…

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Q: At a .01 significance level, with a sample size of 60, find the critical value for the correlation…

A: Given that, N=60 Level of significance =0.01

Q: Determine the critical values for a two tailed test of a population mean at the a=0.01 level of…

A: The test is of a population mean. The sample size is 29.That is sample size is less than 30 for this…

Q: If homogeneity of variance is violated for a correlated-groups t-test, what nonparametric test…

A: Introduction: A correlated-groups t-test, also known as the paired t-test, is used to compare…

Q: sed on a two-tailed t-test,what will be the conclusion of the significance test for this correlation…

A: From there results of first question, the correlation value is 0.97.

Q: Two different brands of milk are randomly samples, and the fat content in each bottle of mild is…

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Q: A sample of 20 observations gave a standard deviation 3-72. Is this compatible with the hypothesis…

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Q: At the insistence of a government inspector, a new safety device is installed in an assembly-line…

A: The data set is: 618 660 638 625 571 598 639 582

Q: The Wilcoxon signed-rank test can be used to perform a hypothesis test for a population median, η,…

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Q: The standard z-value of an arbitrary 16-unit sample from the normal-class population with a mean of…

A: Given Z=2 Mean=60, variance=100, sd=10, n=16 Z=(X-mean)/sd  Z=(Xbar-mean)/sd/√n

Q: find the Q3 (third quartile) position :for a some data with n=30 is

A: We have to find Q3 position for some data with n = 30.

Q: A manufacturer bonds a plastic coating to a metal surface. A random sample of nine observations on…

A: Given: n=990% confidence interval

Q: A pooled variance estimate is useful for two-sample hypothesis tests of a normal mean when the…

A: Solution: The given statement is “A pooled variance estimate is useful for two-sample hypothesis…

Q: A researcher was interested in the relationship between a swimmer’s hand length and corresponding…

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

Q: If independent random variables 'X' and Y have the variances 36 and 16 respectively, find the…

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Q: The accompanying data table includes weights​ (in grams) of a simple random sample of 40 quarters…

A: Levene's test for equality of variance : This test is used to determine whether samples have equal…

Q: Find the critical value for a test for correlation with α = 0.01 for a sample size of 18.

A: In hypothesis test, the critical value of the test distribution is used to compare with the…

Q: a. What is the null hypothesis concerning these variables? b. Are the variances equal across the…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Which of the following statements is NOT correct about the hypothesis test of comparing two…

A: a) As the sample size increases, the critical value for the z-test will become smaller in absolute…

Q: The test score data from the sample of trainees are as follows: 1. Was the knowledge (test score)…

A: Given information: μ=65n=24α=0.05

Q: In case of hypothesis testing in places where population variances are unknown and sample size is…

A: Here we have given the multiple choice question about the hypothesis testing. The question is,    In…

Q: Two suppliers manufacture a plastic gear used in a laser printer. The impact strength of these gears…

A: The question is about hypo. testing for a difference between two popl. means Given : Supplier 1 n1…

Q: What is the critical value of a single sample t-test based on n = 23, and a two-tailed alpha of…

A: The critical value for a single sample two-tailed t-test for n=23 and α=.05 is given by tn-1;α2,…

Q: In testing for the equality of two population variances, when the populations are normally…

A: We have to find correct answer.

Q: A sample of n = 24 data values randomly selected from a normally distributed population has variance…

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Q: At a particular academically challenging high school, the average GPA of a high school senior is…

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Q: What sample size should be used in a study conducted to estimate the average monthly absences of…

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Q: An independent-measures design study with n = 16 in each sample produces a sample mean difference of…

A: Given that, Sample sizes n1=n2=16 Sample mean difference x1¯-x2¯=4 Pooled variance sp2=24

Q: If the p-value is less than alpha in a one-tail test, what conclusion can you draw?

A: We need to use the concept of hypothesis testing