a. In theory, the t distribution is exactly equal to the z distribution when the degrees...

a. In theory, the t distribution is exactly equal to the z distribution when the degrees of freedom are equal to ___________.

b. Given the confidence interval (5.5, 6.5), 5.5 and 6.5 are not included in the interval. (True/False)

c. Which of the two general types of statistics yields estimates about populations? _______________ Statistics.

d. According to the Empirical Rule, _____% of the data exists between the transition points of the normal distribution?

Expert Solution

orchestra answered 2 years ago

As the degrees of freedom increase, the t distribution approaches the z distribution. Explain.

What is t distribution and how it is related to degrees of freedom? How is z...

What is t distribution and how it is related to degrees of freedom? How is z distribution different from t distribution?

How does a t-distribution differ from the z-distribution? How do degrees of freedom (df) affect this?...

How does a t-distribution differ from the z-distribution? How do degrees of freedom (df) affect this? What is the effect of this difference on hypothesis testing? - Your friend performed a two-tailed experiment in which n = 20. He couldn’t find his t-table, but remembered the t-critical at df = 10. He decided to compare his t-obtained to this t-critical and determined the results were not significant. Is this ok? Why or why not.

8. Please graph a “Z” distribution along with two “T” distributions. Provide the degrees of freedom...

8. Please graph a “Z” distribution along with two “T” distributions. Provide the degrees of freedom for each of the two “T” distributions. Hint: Too many “dfs” would make the “Ts” become “Z”.

Find the value of t for a t-distribution with 3 degrees of freedom such that the...

Find the value of t for a t-distribution with 3 degrees of freedom such that the area to the left of t equals 0.10. Possible Answers: A. 5.841 B. 4.541 C. -2.333 D. -1.638

Why is the t-distribution flatter than the z-distribution?

Find the critical value of t for a t-distribution with 30 degrees of freedom such that...

Find the critical value of t for a t-distribution with 30 degrees of freedom such that the area between -t and t is 99% A student records the repair costs for 25 randomly selected computers from a local repair shop where he works. A sample mean of $216.53 and standard deviation of $15.86 are subsequently computed. Assume that the population distribution is approximately normal and s is unknown. Determine the 98% confidence interval for the mean repair cost for all...

What happens to a Student's t-distribution as the degrees of freedom increase? a.A student's t-distribution diverges...

What happens to a Student's t-distribution as the degrees of freedom increase? a.A student's t-distribution diverges from the standard normal distribution as the degrees of freedom increases b.A student's t-distribution converges to the standard normal distribution as the degrees of freedom increases

For a t-distribution with 15 degrees of freedom, 90% of the distribution is within how many...

For a t-distribution with 15 degrees of freedom, 90% of the distribution is within how many standard deviations of the mean? Select one: a. 1.235 b. 1.576 c. 1.753 d. 1.960

the table t-value associated with the upper 1% of the t- distribution and 5 degrees of...

the table t-value associated with the upper 1% of the t- distribution and 5 degrees of freedom is_________________ .

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