Web surveys may include all EXCEPT ______.

A) hosting your survey on its own website
B) using commercial web-based surveys
C) using social media to reach respondents
D) mailing survey forms to respondents

The moisture in a wet mix of cement was considered to have an effect on the denseness of the finished product.The moisture of the mix was controlled at various levels,and the denseness of the finished product was measured.The data were entered into SPSS,and the following output was generated. The standard error for the slope is reported to be 0.90.Which of the following interpretations of this standard error is correct?

A) If this experiment were repeated many times,we would estimate that our estimated slope of 5.0 is about 0.90 away from the true slope ₁,on average.
B) If this experiment were repeated many times,we would estimate the resulting estimated slopes to differ from the true slope ₁ by about 0.90,on average.
C) If this experiment were repeated many times,we would estimate the estimated slope of 5.0 to differ from the true slope ₁ by about 0.90.
D) If this experiment were repeated many times,we would estimate the average distance of the resulting estimated slopes from the hypothesized value of 0 to be about 0.90.

There are three children aged three,four,and five in a room.If another four-year-old child enters the room,what will happen to the mean and variance?

A) The mean will stay the same,but the variance will increase.
B) The mean will stay the same,but the variance will decrease.
C) The mean and variance will both stay the same.
D) The mean and variance will both decrease.

If the form of the graph replaces the substance of the data,the graph is performing to function and graphical excellence is achieved.