The following TI-84 Plus display presents some sample statistics. 1-Var-Stats x=77 ?x=2291 ?x²=182,361 Sx=8 ?x=8.024961059 n=29 Part 0 / 3 Part 1 of 3 (a) Assume that the sample is bell-shaped. Approximately what percentage of the sample values are between 61 and 93? 68% 95% all or almost all Approximately (Choose one) of the sample values fall between 61 and 93.
Added by Edward C.
Close
Step 1
We are given the sample mean (X) as 77.2 and the sample standard deviation (Sx) as 8.024961059. The sample size (n) is 29. Show more…
Show all steps
Your feedback will help us improve your experience
Supreeta N and 51 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 of values has a normal distribution with μ=16 and σ=90. You intend to draw a random sample of size n=145. Please answer the following questions, and show your answers to 1 decimal place. Find the value separating the bottom 72% values from the top 28% values. Find the sample mean separating the bottom 72% sample means from the top 28% sample means.
Madhur L.
Find the interval [μ - zσ/√n, μ + zσ/√n] within which 95 percent of the sample means would be expected to fall, assuming that each sample is from a normal population. (a) μ = 183, σ = 20, n = 50. (Round your answers to 2 decimal places.) --the 95% range is from ---- to ------ (b) μ = 860, σ = 12, n = 6. (Round your answers to 2 decimal places.) (c) μ = 77, σ = 4, n = 27. (Round your answers to 3 decimal places.)
Jacob F.
The Normal Distribution: The 68-95-99.7 Empirical Rule About 68% of the data points fall within one standard deviation of the mean. About 95% of the data points fall within two standard deviations of the mean. About 99.7% of the data points fall within three standard deviations of the mean. Assume that a set of test scores is normally distributed with a mean of 60 and a standard deviation of 12. Use the 68-95-99.7 rule to find the following: 1. Sketch the curve to show your work. (Just numbers will not be graded.) 2. Percentage of scores greater than 60. 3. Percentage of scores less than 72. 4. Percentage of scores greater than 48. 5. Percentage of scores between 48 and 72. 6. Percentage of scores between 24 and 96.
Joshua A.
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