True or False
The test statistic represents the number of estimated standard errors our sample value is away from our hypothesized value.
True or False The test statistic represents the number of estimated standard errors our sample value...
1. True or False? 2. True or False? To compute a t statistic, you must use the sample variance (or standard deviation) to compute the estimated standard error for the sample mean. True False The 95% confidence interval for the difference between two treatment means extends from-2.50 to +5.50. Based on this information, you can conclude that there is no significant difference between the treatments at the .05 level of significance True O False To compute a t statistic, you...
How far away our sample point estimate is from the null hypothesized value in standard error units: a.Random sample b.Alternative hypothesis c.Marginal distribution d.Parameter value e.Test statistic
A one sample t-statistic is the amount or distance between the sample mean and the hypothesized population mean, as measured by the number of standard errors. True or false
Consider an hypothesis test of two means with a test statistic t-stat = 0.78, a critical value t-crit = 2.07, and an hypothesized difference equal to 0. Using the information above, determine the number of standard errors your difference in sample means is away from zero. Select one: a. 0.78 b. 2.07 c. Cannot solve without a significance level. d. Cannot solve without knowing the sample size.
TRUE or FALSE? WHY? 1) When the test statistic is t and the number of degrees of freedom is > 30, the critical value of t is very close to that of z (the standard normal). 2) The t-test can be applied with absolutely no assumptions about the distribution of the population.
True or false A The value of a statistic is often used to estimate the value of a parameter. B. The value of a statistic is computed using the data in a given sample. C. The value of a parameter is usually unknown, because we cannot obtain data for the entire population. D. The value of a statistic is usually unknown, because we cannot obtain data for the entire population. E. A statistic is a number that describes a population....
The represents the number of standard deviations the sample statistic can be from the parameter and still produce an interval that includes the parameter How to find 1 Take confidence level and sketch the normal distribution 1 ais the area in both outer takes of 2. the distribution 3. Divide 1-a in half to get a/2 that represents the area in 1 tai 4. Use the invNorm function in the calculator with a/2 as the area in the left tail...
. Za/2, represents the number of standard deviations The the sample statistic can be from the parameter and still produce an interval that includes the parameter. How to find za/2: 1. Take confidence level and sketch the normal distribution 2. 1-a is the area in both outer takes of the distribution 3. Divide 1-a in half to get a/2 that represents the area in 1 tail 4. Use the invNorm function in the calculator with a/2 as the area in...
true or false 11. When the level of confidence and the sample size remain the same, a confidence interval for a population mean y will be narrower, when the sample standard deviation s is smaller than when s is larger. Chapter 10 12. The closer is the hypothesized mean is from the actual mean the higher is the power of the test. 13. The manager of the quality department for a tire manufacturing company wants to know the average tensile...
Question 12 3 pts Consider the estimated multiple regression model using OLS, with the standard errors in parentheses below each estimated coefficient. There are 1,576 observations in the sample: Ỹ = 10 + 2x - 5X36 (3) (1.5) (2) Suppose the null hypothesis is that the true coefficient (population parameter) for X3 is equal to 1. The test statistic associated with this null hypothesis is: -3 0-2 O 2