A random sample of 100 chemistry students were asked how many lab classes he or she was enrolled in September 2000. The results showed a mean of 1.65 lab classes with a standard deviation of 1.39. Ten years later, a similar survey was conducted to determine if the distribution changed. The 2010 sample mean was 1.82 with a standard deviation of 1.51. Do the data provide statistical evidence that the mean number of lab classes taken in the first survey is different from the survey taken 10 years later? Perform the appropriate test using a = 0.02​

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compare

the 3rd on is correct

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answer: (yeees, you need a poet.)

//blooming serenity//

beautiful in the morning

mysterious at night

wonderous nature souring

with all it's mystical might

the flower that blooms

to the fox that looms

nocturnal creatures

with various features

a blooming flower soon in sight

as a new little hatchling fears to take flight  

afraid to leave it's calming nest,

but dear little bird, mother knows best

as sure as there are stars in the sky,

life is not about who, where what, when or why-

it's the journey that follows

adventures we swallow

of   nature's deep wonders,

natural disasters and storm's thunders.

blooming serenity

life and nature, truly is heavenly.

-kerstien lehman

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