Statistics, hypothesis testing

Hi guys for part (c), Im not sure what to use for the standard deviation in the t-test, any help greatly appreciated

A vegetable producer is interested in the evolution of weekly sales on a particular product over

the past 6 months. Historical data indicated an average weekly sales per retailer of 2,400 units

of the product, over the past 6 months. Following a change in the advertising strategy for this

product, a random sample of sales from 134 dierent retailers was gathered and an average

weekly sale of 3,593 units per retailer was calculated. Consider that the aim of this study is to

assess whether the weekly sales of the product have signicantly increased.

(a) State whether you would carry out a one-sided or a two-sided test.

(b) State the null and alternative hypotheses.

(c) Compute the value of the t-test statistic.

(d) Explain whether you would accept the null hypothesis and why

Re: Statistics, hypothesis testing

You are the one who is taking the course, do you not know the **meanings** of any of these words? What is the difference between a "one-sided" and "two-sided" test? What is a "null hypothesis"? What is a "t-text statistic"?

Re: Statistics, hypothesis testing

I am looking for part (c), for the test stat I do not know what to insert for the deviation..

Re: Statistics, hypothesis testing

Any help? I have a test tmw, it is only part (c), I know the formula etc for t-test statistic but I do not know what to use for standard deviation, how do I compute this, sorry I'm probably leaving out something completely blatant

Re: Statistics, hypothesis testing

SE = s/root(n), would I use this to find the sample deviation somehow? or the difference between two means formula, badly need help