Arecent study used umbilical cord blood to test for 25 hydroxyvitamin d, which is an indicator of vitamin d status of the baby. it was reported that 65% of babies tested were deficient in vitamin d in spite of the fact that the mothers consumed vitamin d supplements during pregnancy. a researcher in a northern region felt that this percentage was too high for this region because with the reduced hours of sunshine during winter months, pregnant women tended to use higher doses of supplements to compensate. a sample of 125 newborns was tested, and 72 were declared to be deficient in vitamin d. what would be the appropriate null and alternative hypotheses that the researcher should establish for a test of significance?

Null hypothesis: p= 0.65

Alternative Hypothesis: p  < 0.65

Explanation:

Below are the null and alternative hypothesis,

Null hypothesis: p= 0.65

Alternative Hypothesis: p  < 0.65

Test  statistic for text of significance  

z = (pcap –p)/

z = (0.576 – 0.65)/

z = 1.73

P- value Approach

p-value = 0.0414

As P-value < 0.05,  we reject the null hypothesis

 There is sufficient evidence  to  conclude that the mother consumed vitamin D supplements during pregnancy. A researcher in a northern region felt that the percentage should be lower for this region because with reduced hours of sunshine during winter months, pregnant women tended to use of higher doses of supplements to compensate.

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation: