Question

(8 points) Identify the critical t. An independent random sample is selected from an approximately normal population with unknown standard deviation. Find the degrees of freedom and the critical t value t* for the given sample size and confidence level. Round critical t values to 4 decimal places. Sample size, n Confidence level Critical value, t* Degree of Freedom 12 90 28 95 4. 98 3 99

Answer 1

This can be calculated by using t table or using excel:

Use command "=TINV(degree of freedom ,probability)"

Sample size,n	Confiedence interval	Degree of freedom	Ctrical value, t*	probability
12	90.00	11	1.795884819	0.10
28	95.00	27	2.051830516	0.05
4	98.00	3	4.540702859	0.02
3	99.00	2	9.924843201	0.01

Sample Size, in confidence Salon Degree of Paedion abol 12 90 9.9012 Steps how I solved this (al M=12 i C.I - 90% Degree of freedom anal = 12-1= 11 Critical value for 11 degree of freedom at d=10% (orol) for two tailed test is 1.7959. (b) m298 (I -95% DR male 98-1 = 97 Critical value for 28dfath = 5% (oro.or) for two tailed test is 2.0518. (c) mp4, C-I = 98040 1 Df = 4-1=3 Critical value for 3 dt at d = 2% (or 0.02) for two tailed test is 4.5407. (d) n=3 C.I= 99% . Df= 3-1 = 2 Critical value for 2 af at d= ) % (0.01). for two tailed test is 9.9248..

Please do the comment for any clarification or doubt.