Purchase Solution

Find the critical value of a t distribution

Not what you're looking for?

Ask Custom Question

Please explain & show why you use formula you use.

Find the critical t alpha/2 assuming the population is normally distributed, the confidence level is 95%, n=101 and sigma is unknown.

The answer is 1.984-I'm having trouble with the large n. I don't have a TI-83 calculator. My book stops @ 29 then just says large z number on the t-dist. table. Don't know what to do with this number-this is the only chart I will have available on a test.

Purchase this Solution
Solution Summary

In this solution I have given an overview of critical values for a t distribution. Secondly, I have explained how to use the Excel sheet I have included to calculate critical values. Finally I have explained why in some cases you can use the standard normal or z distribution to approximate a t distribution.

Solution Preview

I have responded to your post below. First I have given an overview of critical values for a t distribution. Secondly, I have explained how to use the Excel sheet I have included to calculate critical values. Finally I have explained why in some cases you can use the standard normal or z distribution to approximate a t distribution. Please see the attached Word document for details.

Please explain & show why you use formula you use
Find the critical t alpha/2 assuming the population is normally distributed, the confidence level is 95%, n=101 and o is unknown. The answer is 1.984-I'm having trouble with the large n. I don't have a TI-83 calculator. My book stops @ 29 then just says large z number on the t-dist. table. Don't know what to do with this number-this is the only chart I will have available on a test.

I have responded to your post below. First I have given an overview of critical values for a t ...

Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

View More Free Quizzes
Related BrainMass Solutions

  • Critical Values

    21727 Critical values Do one of the following as appropriate: a) Find the critical value t  b) Find the critical value z c) State that neither the normal nor the t distribution applies.

  • T-Distribution and Degree of Freedom

    497668 T-Distribution and Degree of Freedom Use the t-distribution table to find the critical value(s) for the indicated alternative hypothesis, level of significance ?, and sample sizes n? and n?.

  • 7-11 Find the critical values

    (a) find the critical value (b) find the critical value (c) State that neither the normal nor the t distribution applies. Confidence level 90%; n = 16; o is known; population appears to be very skewed. Find the critical values: a.

  • Find the Critical Values and Determine the Appropriate Distribution

    21722 Find the Critical Values and Determine the Appropriate Distribution Do one of the following as appropriate: a) Find the critical value t (alpha/2) b) Find the critical value z (alpha/2) c) State that neither the normal nor the t distribution

  • Degree of Freedom and T-Distribution

    497666 Degree of Freedom and T-Distribution Use the t-distribution table to find the critical value(s) for the indicated alternative hypothesis, level of significance ?, and sample sizes n? and n?.

  • The Critical T-Value That Corresponds to 99% Confidence

    522757 The Critical T-Value That Corresponds to 99% Confidence Find the critical t-value that corresponds to 99% confidence (one tail) and n=10. Response includes a distribution plot attachment.

  • T distribution and degree of freedom

    - Consider a t distribution with 22 degrees of freedom. Find the value of c such that P (-c < t < c)=0.95. Round your answer to at least three decimal places.

  • Hypothesis Testing

    For sample size =22, degrees of freedom=22-1=21, (95% level of confidence) To find out t-critical, refer t-distribution tables and look for combined area=(1-0.95%=0.05) with 21 degrees of freedom Critical value of t=+/- 2.080 (Assume 2-tail test)

  • normal distribution question

    / n) = SQRT(2/10)= 0.447 degree of freedom is df=10-1=9 (a) Ho: u = 5 Ha: u <> 5 Then calculate t=(m-u)/SE =(9-5)/ 0.447 = 8.95 From a t table, we find the two-tailed critical (a=5%) t value is 2.26 Since the calculated t is greater than the critical

View More Related Solutions