Question

the level of to checo this, he drew is randomly selected specimens of river water at the location above the town and another is specimens below. The lved oxygen readings, in parts per millon, are given in table. Above Town 5.2 4.8 5.1 5.0 49 4.8 .0 4.7 4.7 5.0 4.7 5.1 5.0 4.9 4. Below Town 4.2 44 47 49 46 48 49 46 5.1 43 55 47 4.9 48 4.7 Above To 1s 92 0.157 Boxplots of (means are indicated by solid cirdles) 4.0 Above-town specimens Below tow specimens ONO t test used in the computer output? (c) Do the MacBook Air

Answer 1

SolutionA:

t=1.95 p=0.065

alpha=0.05

p>0.05

Fail to reject H0.

there is no sufficient evidence to indicate a difference in means

ANSWER:

NO

SolutionB:

its not pooled variance since standard deviations are not equal.

ANSWER:

seperate variance t test

Solutionc:

yes conditions for t test has met.

sample sizes of the both samples are less than 30

independent random samples.

Solutind:

difference in means=4.92-4.74=0.183

mark option A

the observed difference (0.183 ppm) is not significant.