Hi, 

c=0.98​,x=4.1 ​, o=0.4 ​, and n=49

df = 49-1 = 48 , c=0.98​ 

Using online Calculator/above values for t-value:   z= 2.4066 (t-critical value)

ME =

ME = = 2.315

4.1- 2.3 <  < 4.1 + 2.3

1.8 <  <6.4

ONe may use charts or online calculators for t-values used for small samples

For Large Samples, following z-values are used

 = CI	z = value

90%	z =1.645

92%	z = 1.751

95%	z = 1.96

98%	z = 2.326

99%	z = 2.576



 

RELATED QUESTIONS

Construct the confidence interval for the population mean u. 
c=.98​,X=15.1 , o=9.0... (answered by ewatrrr)

Construct the confidence interval for the population mean u.
c= 0.98, x =7.4, s =0.5, n=  (answered by Theo,ewatrrr)

Construct the confidence interval for the population mean μ. 
c=0.98​, x... (answered by oscargut)

Construct the confidence interval for the population mean μ. 
c=0.98​, x... (answered by Boreal)

Construct the confidence interval for the population mean u.

c=0.90, x=15.5, s=7.0,... (answered by ewatrrr)

If you solve the question below, I'll be appreciated.

A statistics practitioner took a  (answered by Theo)

Construct a confidence interval for the population mean u. c=0.90, x=16.4, s=9.0, and... (answered by stanbon)

In a random sample of 28 people, the mean commute time to work was 31.2 minutes and the... (answered by Boreal)

	Construct the confidence interval for the population mean μ.
c = 0.95, (x )... (answered by ewatrrr)