A researcher used a sample of n =16 adults between the ages of 40 and 45. For each person, the researcher recorded the difference between the ratings obtained while smiling and the rating obtained while frowning. On average the cartoons were rated as funnier when the participants were smiling, with an average difference of MD = 1.6, with SS = 135. Are the cartoons rated as significantly funnier when the participants are smiling ? Use a one-tailed test with α = .05. Compute r2 to measure the size of the treatment effect. r2 is

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A: Solution Given the test is a left tailed test  So the alternative hypothesis is left tailed.

Q: 32. For a two-tailed test with alpha = .05, what is the critical r?

A:

Q: If I have a sample of 25 people what is my T-threshold for a two-tail test and an alpha of 0.05…

A: Given: Sample size (n)=25 Level of significance α=0.05%

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

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A: Solution:

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A: Given information d¯=18n=16Sd=SSn-1=600016-1=20

Q: I have a z statistic of 2.91 from a one tailed test. What is my p value?

A: P(z>2.91 )=? P(z>2.91)= 1 - P(z<2.91) From z table the critical value at 2.91 is 0.9982…

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A:

Q: To evaluate the effect of a treatment, one sample of n=8 is obtained from a population mean: u=40…

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

A: For alpha level 0.05: The degrees of freedom, df=n-1=10-1=9 The degrees of freedom is 9. Computation…

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A: Given Information:      Sample Size (N)=75 Correlation r=0.19α=0.05

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

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Q: A researcher used a sample of n =16 adults between the ages of 40 and 45. For each person, the…

A: Given information, A researcher used a sample of n =16 adults between the ages of 40 and 45. For…

Q: A one sample t test has n = 12. If using a two-tail test (proportion in two tails combined) with an…

A: Sample size n=2.201 Significance level α=0.05 The degrees of freedom n-1=12-1=11

Q: what is the critical t-value for a right-tailed test when alpha = .025 and df = 12

A:

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

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A: Given information- Population mean, µ = 80 Population standard deviation, σ = 20 Sample size, n = 25…

Q: What is the critical value for a two sided t-test with an alpha = .05, and degrees of freedom = 60?

A:

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Q: 23. If you are doing a two-tailed test and alpha = .05, find the critical value of r from the table:

A: Correlation is an associational statistic.

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Q: A study on the oxygen consumption rate (OCR) of sea cucumbers involved a random sample of size 12 at…

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A: We have given that  Correlation coefficient r = 0.60 Sample size n = 10

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Q: In a study with 11 participants, what would be your critical t score for a one-tailed test at the…

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Q: In a similar study using the same design (sample of n = 9 participants), the individuals who wore…

A: The null and alternative hypotheses are’ H0:m=3.1 H1:m≠3.1 The sample mean is 6.4 and the population…

Q: With α = .05, what is the critical t value for a one-tailed test with n = 15?​

A: Given level of significance = 0.05 and one tail test.we need critical value for t distribution with…

Q: A random sample of 100 male employees showed that 42 are working from home while a random sample of…

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Q: You obtain a t comp of .975 in a two sample independent t test with alpha at .05. Is it…

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Q: A researcher used a sample of n =16 adults between the ages of 40 and 45. For each person, the…

A: a) b) c) Using Excel function, "=T.INV(0.95,15)". the critical value is 1.753.

Q: 2. In building an arena, steel bars with a mean ultimate tensile strength of 400 Megapascal (MPa)…

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Q: At a .05 “alpha level”, what is the “critical cutoff” z-score for a “two-tailed test”?

A: The critical value is zα/2.

Q: At a .01 “alpha level”, what is the “critical cutoff” z-score for a “one-tailed test”? Explain how…

A: Introduction:A one-tailed test may be of two types: left-tailed or right-tailed, depending upon…

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