WHAT PROGRAM TO USE ON TI-84 PLUS? Twelve different video games showing substanc
ID: 3071074 • Letter: W
Question
WHAT PROGRAM TO USE ON TI-84 PLUS?
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 99% confidence interval estimate of , the mean duration of game play.
4058 3887 3852 4036 4325 4815 4665 4042 5005 4813 4343 4315
What is the confidence interval estimate of the population mean ?
WHAT SECTION DO I USE IN THE TI-84 PLUS TO SOLVE THIS.
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=4346.33
standard deviation,s=393.32
n=12
df=12-1=11
crtical t value=tinv(0.01,11)=3.106
99% confidenec interval for mean
=4346.33+/-3.106*(393.32/sqrt(12))
=4346.33+/-352.63
=(3993.70, 4698.97)
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