Option-B) False.
Because t distribution is used when we don't know the population standard deviation and sample size is less than 30 or small. Otherwise use z distribution
V ide Question 1 The T distribution is used when you have the standard deviation of...
Question 1 The T distribution is used when you have the standard deviation of the population (σ). True False
Question 2 You may use the Normal distribution when you have the standard deviation of the sample and the sample size is higher than 30. True False Question 3 With of 98 and a sample standard deviation of 10, the sample size of 16, and the population mean (μ) of a 100, the experimental t value is 0.8, and the P – value is between 0.10 and 0.25. True False
A normal distribution is approximated as a Student t distribution when the population standard deviation is unknown. Select one: True on O False
The t test is used when the standard deviation of the population is known. True False
11 a) True or False: The t distribution has a greater standard deviation than the standard normal z distribution. Can you explain or prove why this is True? I have a hunch it has something to do with the sample sizes vs the population but I'm really not sure & I really like to be able to explain why things are true or false for questions like this. Thanks!
QUESTION 1 1. The sample variance or the sample standard deviation are good approximate of the population variance or standard deviation? True or False QUESTION 2 1. The Central limit theorem states that the individual results or when n is 1 in an experiment that unique outcome follow a Normal Distribution? True or False QUESTION 3 1. In hypothesis testing alpha is the probability of being judged correct? True or False QUESTION 4 1. If the critical Z is ±...
The difference between the T distribution and the standard normal (z) distribution decreases as the degrees of freedom increase. True False When estimating the number of responses to be collected in order to achieve a desired margin of error on a proportion, what value should be used for the population proportion if no estimate is available? Enter your answer as a decimal to 2 decimal places. A population is believed to have a standard deviation of 23.1. An analyst wants...
When using the t distribution to calculate a confidence interval (because the population standard deviation is not known), we assume that the population of interest is normal or approximately normal.TrueFalse
The standard deviation of the population is commonly used to estimate the standard deviation of the sample. True False
Table VII provides a t-distribution when the population standard deviation (sigma) is unknown. What is the degrees of freedom (df) for a sample size n = 20? 2 10 19 0 o 20