In the chi-square goodness-of-fit test, the possibility that chance alone is responsible for any deviations between observed and expected is referred to as which of the following?

a) segregation hypothesis
b) null hypothesis
c) branched hypothesis
d) acceptance hypothesis
e) assortment hypothesis

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.