What is the equation used when computing the degree of freedom for a t-test about the mean? On On-1 On1 + n2-2 On/2

Q: Three experiments investigating the relation between need for cognitive closure and persuasion were…

A: Given, x=178.70σ=7.65n=66α=1-0.95=0.05 Since population standard deviation is given, therefore…

Q: If the variance of x is 4 then the variance of 3 + 5x is (a) 100 (b) 103 (c) 20 (d) 23

A: Step 1:Adding a constant a to a random variable does not change its variance, and multiplying a…

Q: Based on a sample of 60 men, 35% owned cats Based on a sample of 20 women, 55% owned cats The test…

A: Let's perform the calculations:For men:Sample size (men): n1 = 60Proportion of men who owned cats:…

Q: Tests for tuberculosis like all other diagnostic tests are not perfect. QFT-G is one of such tests…

A: The events are defined as follows:: stands for the test that gives a positive result and : means…

Q: ​A research report concludes that there are significant differences among treatments, with "F(2, 24)…

A: According to the report there are significant differences among treatments.

Q: A grocery store manager wants to know if displaying cranberries near the entrance to the store…

A: P1 : Proportion of shoppers who buy Cranberries when they are near the store entrance. P2 :…

Q: The distribution of weight of a small watermelon is known to have a mean of 5 pounds and a standard…

A: LetXi​:Weight of i th watermelonhere i=1,2,..,6So we haveXi​∼N(μ=5,σ=1.2)Nowlet total weight =…

Q: Where did the 1.463 and +- 1.960 came from ?

A: According to the given information in this question We need to identify from where test statistic…

Q: Step 1 of 2: Write the multiple regression equation for the computer output given. Round your…

A: The regression line is given byBaby's Weight = 8.231 - 1.933Mother's Weight+ 1.438 Father's Weight

Q: A sample of 10 students took a class designed to improve their SAT math scores. Following are their…

A:

Q: Based on a sample of 60 men, 35% owned cats Based on a sample of 20 women, 55% owned cats The test…

A: First sample (Men), Number of men n1= 60Proportion of men who owned cats, 1=0.35Number of men who…

Q: Is there evidence that the proportions of 14- to 18-yearold girls who have or have not gotten into…

A:

Q: Q3 Below is a table showing the number of people in three different groups experience abdominal pain…

A: The chi-square test is used to estimate whether there is any significant difference between the two…

Q: You are conducting a multinomial hypothesis test for the claim that the 4 categories occur with the…

A:

Q: The following model predicts credit card acceptance (yes) as follows: p-value (0.001) Intercept…

A: Answer:- Given data table   Coefficient  p-value  Intercept  1.05 (<0.001) Bedreports…

Q: Suppose X ~N(40,2.8). What is the z score of x =35.8

A: Given: X~N(40,2.8) μ=40 σ=2.8 X=35.8

Q: The following table was generated from the sample data of 10 college students regarding the number…

A: The p-value of x1 variable is 0.001410 and the p-value of x2 is 0.006384.

Q: Claim: Most adults would erase all of their personal information online if they could. A software…

A: Given that,sample size(n)=667success rate ( p )= x/n = 0.59success probability,( po )=0.5failure…

Q: Suppose you are constructing a Cl for a mean using the T-distribution and your sample size is 17.…

A: Degrees of freedom = n-1

Q: When is a z-score considered to be highly unusual? Group of answer choices a z-score over 1.96 is…

A: here we have to answer that when is a a z score considered to be highly unusual?

Q: You may need to use the appropriate technology to answer this question. The following is part of the…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: Suppose that the 101 randomly selected eighth-grade students (mentioned in question 6) took a…

A: From the provided information, The test statistic t = -2.32 And p < 0.05

Q: (a) Construct a 95% confidence interval for the average number of minutes per week a student…

A: Confidence interval: Since the population standard deviation is unknown, t distribution can be used…

Q: ANOVA Test 15. A researcher believes that students do better on a reading test when hearing a…

A: Hypothesis  null hypothesis : there is no  significance difference between any of the types of…

Q: The following table provides a probability distribution for the random variable x. f(x) 3 25 6. .50…

A:

Q: In a computer instant messaging survey, respondents were asked to choose the most fun way to flirt,…

A:

Q: Suppose we know that P(A) = 0.38, P(B) = 0.51, and P(A and B) = 0.22. %3D What is P(A or B)? Add…

A:

Q: A research study compares the mean weight for a sample of n = 36 participants before they begin a…

A: Correct answer is Dependent samples t-test

Q: Please answer number 13.

A: It is given that 43% had no children, 18% are had one child, 18% are have two children, 21% have…

Q: In a sample of 50 leopards selected randomly from one preserve, it is found that 33 of them have…

A: Given, The sample proportion is,

Q: XYZ Corporation is deciding whether to develop a new product or not. The probability of successful…

A: Probability:            In statistics, the probability of success and failure conditions can be…

Q: A sample of n = 9 scores is obtained from a population with μ = 45 and σ = 6. If the sample mean…

A: Given data, μ = 45  σ = 6 n=9 If z=+1 Sample mean x=?

Q: number with "1" as the leading digit is about 0.303. Now suppose you are the auditor for a very…

A: The random variable computer file follows binomial distribution. The population proportion is 0.303.…

Q: In a sample of 74 leopards selected randomly from one preserve, it is found that 7 of them have…

A: Solution: Let X be the number of leopards have respiratory problems and n be the sample number of…

Q: se McNemar's Test since the data are dependent? P(physicians pos | computer pos) != P(physicians…

A: Physician diagnosis    Computer diagnosis Infected Not Infected Total Infected 48 20 68 Not…

Q: The p-value represents the probability that a sample will result in a statistic such as the one…

A: Thank you for posting the question. Since you have asked multiple question, we will solve the first…

Q: A researcher used a Chi-Square test for independence where the two variables were eye color and hair…

A: The Chi-square test of association evaluates relationships between categorical variables. Null and…

Q: Suppose that a marketing researcher has been asked to determine if playing a new jingle on ice-cream…

A: Null and alternative hypotheses: The marketing researcher is specifically interested to test whether…

Q: In a previous year, 53% of females aged 15 and older lived alone. A sociologist tests whether this…

A: The hypothesized proportion is 0.53.

Q: This cardiologist gets a report on his patients' sugar consumption from the nutritionist. He becomes…

A: Given Data Population Mean,μ = 16.1 Population Standard Deviation,σ = 3.5 sample…