I also have questions about whether a financially desperate Pearson may be creating demand for its products by making tests more difficult to deflate student performance.
Mr. Singh, of Yahoo, said ad campaigns on the Web can be constantly tested and refined -- giving the Web an advantage over other media like television or print, where the absence of direct feedback makes testing logistically difficult, and where production costs are higher and lead times longer.
The heteroscedasticity in the second WTP level equation is also confirmed by the significant variables in the heteroscedasticity model, and this means that if we had not allowed for this, we would have large variances thereby making hypothesis testing difficult.
Polycystic kidney disease (PKD) is one of the most common potentially life-threatening human genetic disorders, and early and severe PKD occur in patients with the autosomal recessive form (ARPKD) and 2 5% of the autosomal dominant form (ADPKD). PKD is highly genetically heterogeneous, making genetic testing difficult.
To date, few models have been successful in revealing the molecular function of EWS-FLI1 in cancer, which has made testing new therapies difficult.
In addition, they work on multiple crops where individual growers make decisions about applying pesticides based on particular field conditions for specific crops, which makes pre post testing difficult without the cooperation of multiple growers (Arcury et al. 2009a).
Some of the cultivated constructs (monolayer, pellet) do not resemble the actual ECM structure, which makes mechanical testing difficult or impossible (Tables 1, 2, 3, 4, 5).
HHD was not performed at the ankle as limited motion and profound weakness made valid testing difficult.
One individual reported some paraesthesia/numbness in the area which made the testing difficult and frustrating.
The number of different genes involved makes genetic testing difficult but not impossible.
