If the absolute value of a t-statistic is greater than t-critical, what should we do ?

Q: The average age at which adolescent girls reach their adult height is 16 years. Suppose you have a…

A: Given Information: Hypothesized value of population mean is μ0=16 Sample size n=29  Sample mean…

Q: The time spent on volunteer activities varies within a group of students. A particular group of…

A: Mean μ=2, standard deviations σ=3 , n=100  P( x̄>2.5)=?

Q: Why are there no negative values for the F-ratio? Why do values in the F-distribution cluster around…

A: Given information: The property of F-distribution is given.

Q: You are in charge of assessing two different Malaria vaccines, to determine if one should be…

A:

Q: The p-value for this test is approximately

A: Here Given for two tail test  Sample size=n=144 Sample mean=x¯=60.8 Standard deviation=s=3.6

Q: Suppose the relationship between Y and X is given by: Y = 25 - 3X + error What is the expected…

A: Suppose the relationship between Y and X is given by: Y = 25 - 3X + error

Q: The sample is actually 55.  what is the critical value?

A: It is given that the sample is 55 and there are three treatments.

Q: Why should you generally expect some error when estimating a parameter by a statistic? What is this…

A: ANSWER:-  A sample is subset or part of the population and sample does not include all the members…

Q: You are performing a two-tailed t-test with test statistic t=2.42 and a sample of size 45, find the…

A: Given that, n = 45 The type of test is two tailed test The value of test statistic is, t = 2.42 The…

Q: What is the decision rule for the t-test that the mean child mortality rate for countries in Eastern…

A: It is tested that the mean child mortality rate for countries in Eastern Europe is more than the…

Q: To adjust our estimate of variability we subtract 1 from the sample size because we expect samples…

A: Introduction: Suppose a population consists of N units. Then, the formula for the population…

Q: What is the critical value? What is the p-value?

A: T test are used to measure the mean significance between the sample and population. It used when the…

Q: What is the critical difference? Is (P)Less than or greater than .05?

A:

Q: What is the critical value? What is the p value?

A: Hypothesis test has two types of approach to make conclusions. They are p value approach and…

Q: The test statistic is t = ___. Critical value(s) is _____.

A:

Q: Given the information in above table and the null that the marginal propensity to consumption (B1)…

A: The question of multiple linear regression. C=ß0+ß1Rt+ß2lt

Q: "A between-subjects ANOVA was found to be significant, with a SS-Between = 210.29 and SS-Within =…

A: Given: SS between = 210.29 SS total = 161.76 A sample measure of effect size is given by "η2=" (SS…

Q: According to the World Health Organization (WHO), Body Mass Index (BMI) is a statistic that…

A: Given data, 15.8 16.1 13.7 15.3 19.2 14.7 18.1 16.8 18.6 19.9 16.5 17.7…

Q: ome up with the 90% confidence interval for the difference.

A: Given that  A researcher surveyed 677 college men and 587 college women.  498 of the college men…

Q: When the level of investment expenditures of non-manufacturing firms in the US (denoted as Y),  from…

A: Solution is given below:

Q: A distribution of scores has a median of 84 and a mean of 80. Based on this information it appears…

A:

Q: 2. Calculate your t-statistic.

A: We have given that  Sample mean = 88 Population mean = 85 Sample standard deviation = 7 Sample size…

Q: When results from a scholastic assessment test are sent to test-takers, the percentiles associated…

A: Given: 99th percentile  for their verbal grade

Q: Is the statement below correct? Explain. "The calculated t-value is greater than the critical…

A: Under hypothesis testing, we want to find the evidence to reject the null hypothesis.

Q: The population mean will always be the same as the mean of all possible X that can be computed from…

A: sample mean converges to population mean only when the sample size is large .

Q: A test has been devised to measure a student's level of motivation during high school. The…

A: Denote X as the motivation scores on this test. It is given that X is normally distributed, with…

Q: Explain why the F-ratio is expected to be near 1.00 when the null hypothesis is true.

A: Given Null Hypothesis is true which indicates the treatment has no systematic effect The error term…

Q: The distribution of weights for 12–month–old baby boys in the US is approximately normal with mean μ…

A: Let X be the distribution of weights for 12–month–old baby boys in the US  X~ N( μ = 22.5 pounds,σ =…

Q: Provide an example scenario for which you would use ANOVA and explain what the calculated F value…

A: Suppose a sample of diabetes patients and non diabetes patients weight is taken . A One Way ANOVA…

Q: 7. Shows how close the point estimator to the value of the parameter as the sample size increases.

A: Consistency Shows how close the point estimator to the value of the parameter as the sample size…

Q: Let r be number of success from the n trials take from a population with proportion of success = p,…

A:

Q: Although the learning curve never completely levels off to a horizontal line, if work standards are…

A: Given, Learning rate, r = 0.80 So, Learning coefficient, b = LN(r) / LN(2) = LN(0.8)/LN(2) = -0.3219…

Q: Now use a repeated-measures t-test with α =.05 to evaluate the mean difference between treatments.…

A: It is given that:

Q: When would you use a chi-square analysis A.When the variance between two groups are equal B. When…

A: C. When you only have categorical variables to analyze

Q: State the empirical rule as specialized to variables.

A: Empirical rule- It is also called as 3-sigma rule, because in this all the data falls under 3…

Q: How is a t-test related to the t-statistic of a parameter?

A: A test statistic is a standardized value that is calculated from sample data during a hypothesis…

Q: (f) Plot 95% confidence limits for the mean response on the graph around the regression line.

A: Soln ## R Code # Importing the dataset dataset = read.csv('Data_6Feb20.csv') head(dataset) ## a)…

Q: 1. What is the difference between the t-statistic you calculate from your sample and teritical that…

A: We have given that the statement about t-statistic calculated from the sample and t-critical value…

Q: A special diet is intended to reduce systolic blood pressure among patients diagnosed with stage 2…

A: Given data,The Null Hypothesis is H0:μ≥150The Alternate Hypothesis is Ha:μ<150n=28x=142s=20Find…

Q: State the empirical rule for variables.

A: The empirical rules for variables are as follows:68% of all possible observations lie within one…

Q: 19. An advantage of the interquartile range (IQR) over the range (R) is that it a. can be used for…

A: Hi! Thank you for posting the question. Since you have posted multiple questions, we are answering…

Q: What is the value of the t-statistic of the constant?

A: It is given that Coefficient of constant = 5.439236 Standard error of constant = 0.7981253

Q: You are conducting a two-tailed test of a claim about a population proportion . If α=0.02, find the…

A: We have given that,  Significance level (α) = 0.02  Then,  We will find the critical value for…

Q: The claim is that the proportion of peas with yellow pods is equal to 0.25​ (or 25%). The sample…

A: Given that, x=117,n=450,p=0.25 The sample proportion is,

Q: You are performing a left-tailed t - test with test statistic t=-1.62 and a sample of size 23, find…

A: Test statistic = t = - 1.62 Sample size = n = 23

Q: ANOVAs are to be used when the dependent variable is interval or ratio and the independent variable…

A: The “ANOVA” means Analysis of variance. The analysis of variance is the most powerful statistical…

Q: You are performing a left-tailed t - test with test statistic t=−2.59 and a sample of size 33, find…

A: Given information: t = -2.59 n = 33 Degree of freedom=n-1=33-1=32