![mohammedel04](/avatars/18993.jpg)
mohammedel04
06.05.2020 •
Mathematics
An environmental group is conducting a study to determine whether dolphins in a certain region are ingesting unhealthy levels of arsenic. A marine biologist classifies arsenic levels greater than 7.0 parts per million as unhealthy. The arsenic levels in a random sample of 28 dolphins in the region are measured and recorded, and the data are shown in the stemplot.
Part A: What proportion of dolphins in the sample have arsenic levels classified by the marine biologist as unhealthy? (4 points)
Part B: The mean aresenic level of the 28 dolphins in the sample is 5.26 parts per million and the standard deviation is 1.49 parts per million. Construct and interpret a 99% confidence interval for the mean arsenic level of dolphins in the region. (6 points) (10 points)
Solved
Show answers
More tips
- H Health and Medicine Discover the Hidden Principles and Real Results of the Japanese Diet...
- C Computers and Internet Google Search Tips and Tricks: Everything You Need to Know...
- F Food and Cooking Experts Name Top 5 Healthiest Teas...
- F Food and Cooking From Latte to Espresso: Which Coffee Drink is the Most Popular on Earth?...
- F Food and Cooking How many stages of coffee roasting are there?...
- C Computers and Internet Porn Banner: What It Is and How to Get Rid Of It?...
- G Goods and services How to Choose a Coffee Maker? The Ultimate Guide for Coffee Lovers...
- C Computers and Internet How to Teach Older Generations to Work with Computers?...
- P Philosophy Unidentified Flying Object - What is the Nature of this Phenomenon?...
- H Health and Medicine Boosting Immunity: A Complete Guide on How to Improve Your Body’s Natural Defenses...
Answers on questions: Mathematics
- M Mathematics Here. theyre useless-...
- M Mathematics How do I find an overall grade? My scores are:27.92 out of 3019.25 out of 17.521.88 out of 17.511.55 out of 17.513.65 out of 17.5The two scores I got bonus questions right that...
- G Geography Part 2 of plate tectonics. pls help...
- B Business Preparing statistical graphs is used in this step of market research. O collect the information O analyze the information O present the findings O define the problem and research...
- E English An argumentive eassy on all high school students should be able to leave school for lunch...
- M Mathematics How many people will there be if I have 58 friends and each of them bring five friends, but 6 of my friends are couples? So, how many people will be at my party, including me?...
Ответ:
x = 21
Step-by-step explanation: