A population mean is 13. The sample mean is 12.8, and the sample standard deviation is 2. The sample size is 20. What distribution should you use to perform a hypothesis test? Assume the underlying population is normal.
Added by Chelsea B.
Step 1
Step 1: Since the sample size is 20, which is greater than 30, we should use the z-distribution to perform the hypothesis test. Show more…
Show all steps
Close
Your feedback will help us improve your experience
Narayan Hari and 70 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A population mean is $13 .$ The sample mean is 12.8 , and the sample standard deviation is two. The sample size is $20 .$ What distribution should you use to perform a hypothesis test? Assume the underlying population is normal.
Madhur L.
A population mean is 13. The sample mean is 12.8, and the sample standard deviation is two. The sample size is 20. What distribution should you use to perform a hypothesis test? Assume the underlying population is normal. Student's t-distribution geometric distribution exponential distribution normal distribution binomial distribution
Prabhakar K.
Perform the appropriate hypothesis test. A random sample of size $n=13$ obtained from a population that is normally distributed results in a sample mean of 45.3 and sample standard deviation of $12.4 .$ An independent sample of size $n=18$ obtained from a population that is normally distributed results in a sample mean of 52.1 and sample standard deviation of $14.7 .$ Does this constitute sufficient evidence to conclude that the population means differ at the $\alpha=0.05$ level of significance?
Inferences on Two Samples
Putting It Together: Which Method Do I Use?
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD