A study was conducted on the effects of developer strength f

A study was conducted on the effects of developer strength (factor A) and development time (factor B) on the density of photographs. Two strengths and two development times were used, and four replicates in each of the four cells were evaluated Complete pars (a) through (e) a. At the 0.05 level of significance, is there an interaction between developer strength and development time? Determine the hypotheses Choose the correct answer below.

Solution

the question is just for the null hypothesis and alternative hypothesis

which is the correct?

we know that the nully hypothesis always will have a equals sign , or > or <

so the answer for null hypothesis is :

Ho: THERE IS AN INTERACTION BETWEEN DEVELOPER STRENGTH AND DEVELOPMENT TIME

H1 : THERE IS NO INTERACTION BETWEEN DEVELOPER STRENGHT AND DEVELOPMENT TIME