Hypothesis & Empirical Rule

Null Hypothesis

100

Null Hypothesis is Represented by which symbol?

 H-null or H-zero or H₀

200

If the null hypothesis is rejected then which hypothesis is accepted?

Alternate hypothesis

300

We assume the null hypothesis is true at the start until proven to be unlikely or false.  

(A) True

(B) False

(A) True

400

Which of these is a correct null hypothesis for the statement? The average ounces of milk babies drink is 12 ounces.

(A).H₀: μ = 12

(B).H₀: μ > 12

(C).H₀: μ < 12  

(A).H₀: μ = 12

500

The smaller the p-value, the more likely that Hₒ is false, providing stronger support for rejecting it and enhancing the probability of accepting H_A as correct. 

(A).True

(B).False

(A).True

Alternative Hypothesis

100

Alternative Hypothesis is represented by which symbol?

H_A 

200

What is the alternate hypothesis to the statement "On average babies drink 12 ounces of milk a day"?

H_A :  

mu !=12

300

What is the Alternative Hypothesis for the statement "More than 90% of teens use at least one social media platform"

mu<90%

400

True or false: a sample proportion outside the 95% confidence interval means the alternate hypothesis is not likely?

False.

500

In order to accept the alternative hypothesis, z-scores need to be ___________________________

More than 2 standard deviations from the mean

P-value

100

P-value represents the proportion the percent of an event occuring

(A).True

(B).False

(A).True

200

P-values are considered outliers if they are more than 0.05 or (5%)

(A).True

(B).False

(B).False

300

In conducting research, it is often possible to collect data about the whole population of interest.

(A).True

(B).False

(B).False

400

The p-value tells you the ________under the tail of the normal curve

proportion

500

A normal smartphone battery manufacturer claims that the mean life of a certain type of battery is more than 650 hours. What is the null hypothesis?

H₀: 

mu >= 650

Significance

100

An outlier is _______________

Significant

200

If a sample proportion is ______________we accept the null

not significant

300

A p-value that is less than 0.05 is ___________

significant

400

A z-score that is less than 2 standard deviations from the mean is __________________

not significant

500

If a sample proportion is inside the the 95% confidence interval then it is __________and we_________the null hypothesis

not significant    accept 

Empirical Rule

100

Which confidence interval is considered the normal range?

the 95% confidence interval

200

How many standard deviations from the mean is the 68% confidence interval

1 standard deviation

300

Three standard deviations from the mean is the __% confidence interval

99.7%

400

If the average is 10 inches and the standard deviation is 1.5 inches , what percent lies between 7 and 11.5 inches?

81.5%

500

What percent lies under the entire normal curve?

100%