Question

NEED R CODE PLEASE ## Problem 4 *For the `homedata` (**UsingR**) data set find 90% confidence intervals for both variables `y1970` and `y2000`, assuming the sample represents some population. Perform one sample t-test for each variable, use `t.test()`, but first discuss whether the model assumptions are appropriate (include some check of the assumptions, like a Q-Q plot).*

Answer 1

One sample t test assumptions:

The dependent variable must be continuous (interval/ratio)
The observations are independent of one another.

The dependent variable should be approximately normally distributed.

The dependent variable should not contain any outliers.

test code:

t.test(x, mu = mean)

Q-Q plot code :

qqPlot(x,y=NULL,distribution="norm",plot.type="Q-Q")