Lesson 7 Activity: Confidence Intervals and Hypothesis Testing

A confidence interval is the range of values that a ​ (a)   is likely to fall within.

• parameter
• statistic
• sample mean
• sample standard deviation
• population standard deviation
• mode

What is the level of confidence typically used for confidence intervals?

• 50%

• 75%

• 90%

• 99%

What is the formula for a confidence interval for the population mean?

What does the term "null hypothesis" refer to?

• The hypothesis that is being tested.

• The opposite of the hypothesis that is being tested.

• The hypothesis that the researcher would like to be true.

• The hypothesis that the researcher thinks is true.

What is the p-value?

Answer explanation

The probability of obtaining a test statistic as extreme or more extreme than the observed one, assuming the null hypothesis is true.

The level of significance typically used for hypothesis testing is _.

(a)  

When do you reject the null hypothesis in hypothesis testing?

• hen the p-value is less than the level of significance.

• When the p-value is greater than the level of significance.

• When the sample size is large enough.

• When the sample size is small enough.