How to use ti-84 calculator to obtain this answer? Twelve different video games
ID: 3071405 • Letter: H
Question
How to use ti-84 calculator to obtain this answer?
Twelve different video games showing substance use were observed and the duration times of game play (in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. Use the data to construct a 95% confidence interval estimate internal estimate of mu the mean
4039
3881
3868
4033
4311
4819
4650
4029
5007
4833
4324
4318
4039
3881
3868
4033
4311
4819
4650
4029
5007
4833
4324
4318
Explanation / Answer
Ans:
As,population standard deviation is not known,we will use t-interval.
Use Tinterval function of Ti-84 calculator,add list of data and confidence level.
mean=4342.667
standard deviation,s=396.578
n=12
df=12-1=11
crtical t value=tinv(0.05,11)=2.201
95% confidenec interval for mean
=4342.67+/-2.201*(396.578/sqrt(12))
=4342.67+/-251.97
=(4090.69, 4594.64)
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