ASTA2 W7 Review (Null and alternative hypothesis testing)

What is hypothesis testing in statistics using one sample?

• Testing data from one sample/group to see if hypothesis is correct

• Determining if one sample is different from the population as a whole

• Testing if hypothesis matches the one sample

The null hypothesis...

• always contains the inequality

• never contains the inequality

• can contain the equality or inequality

• has no restrictions

Null hypothesis =

• hypothesis of no change

• hypothesis of change

Identify the alternative hypothesis.

• p = 0.12

• p > 0.12

• p ≠ 0.12

• p < 0.12

What is the alternative hypothesis?

• The same as the null hypothesis

• A statement of "no difference"

• The claim we seek evidence against

• The claim we hope or suspect to be true

Fill in the 3 blanks: The alternative hypothesis: the condition of ____ or ____ (This is what you want ___).

• interest; desired result; to prove

• indifference; existing situation; to reject

Alternative Hypothesis =

• A position that states that nothing is happening. AKA default hypothesis

• A position that states something is happening. AKA research hypothesis

• A position that only describes what happens at "baseline"

• A position that states that everything is happening. AKA total hypothesis

Last year, your company's service technicians took an average of 2.6 hours to respond to trouble calls from customers who had purchased service contracts. Does this year's data show a different average response time?

• H₀: µ = 2.6; H_a: µ > 2.6

• H₀: µ ≠ 2.6; H_a: µ = 2.6

• H₀: µ = 2.6; H_a: µ ≠ 2.6

• H₀: µ = 2.6; H_a: µ < 2.6

Researchers have postulated that, due to differences in diet, Japanese children have a lower mean blood cholesterol level than U.S. children. Suppose that the mean level from U.S. children is known to be 170.

• H₀: µ = 170; H_a: µ < 170

• H₀: µ = 170; H_a: µ > 170

• H₀: µ = 170; H_a: µ ≠ 170

• H₀: µ = 170; H_a: µ ≤ 170

What is the alternative hypothesis?

• There will be a sig dif in plant height acrosss dif levels of fertilizer

• There will not be a sig dif in plant height across dif levels of fertilizer

• There will be an increase in height with increasing fertilizer

• There will be a decrease in height with increasing fertilizer