You are trying to determine if schizophrenics have altered levels of the hormone oxytocin. You take cerebral spinal fluid samples from 20 schizophrenic patients and 20 age and sex matched normal individuals. The levels of oxytocin are measured and compared. Based on this study, which statistical test should be used? Group of answer choices

1 tail paired t test

2 tail paired t test

1 tailed 2 sample t test

2 tailed 2 sample t test

answer: every time you get a disposable straw, it eventually gets thrown away. many of these straws, along with other plastic trash, ends up in the ocean, where it can harm or kill sea turtles and other marine wildlife. straws can get up a sea turtle's nose, or a sea turtle can eat the straw, because it thinks it's food.

they are known to reach a speed of 21 miles per hour

i think the answer would d

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.