Question

The National Weather Service keeps records of snowfall in mountain ranges. Records indicate that in a...

The National Weather Service keeps records of snowfall in mountain ranges. Records indicate that in a certain range, the annual snowfall has a mean of 81 inches and a standard deviation of 12 inches. Suppose the snowfalls are sampled during randomly picked years. For samples of size 36, determine the mean and standard deviation of  .

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Solution :

Given that ,

mean = = 81

standard deviation = = 12

n = 36

sample distribution of sample mean is ,

=

= 81

sampling distribution of standard deviation

=  / n =12 / 36=2

= 2

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
For samples of the specified size from the population described, find the mean and standard deviation...
For samples of the specified size from the population described, find the mean and standard deviation of the sample mean.The National Weather Service keeps records of rainfall in valleys. Records indicate that in a certain valley, the annual rainfall has a mean of and a standard deviation of Suppose the rainfalls are sampled during randomly picked years, and is the mean amount of rain in these years. For samples of size 36, determine the mean and standard deviation of .
The amount of snowfall falling in a certain mountain range is normally distributed with a mean...
The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 70 inches and a standard deviation of 10 inches. What is the probability that the mean annual snowfall during 25 randomly picked years will exceed 72.8 inches? Write your answer as a decimal rounded to 4 places.
The amount of annual snowfall in a certain mountain range is normally distributed with a mean...
The amount of annual snowfall in a certain mountain range is normally distributed with a mean of 73 inches and a standard deviation of 9 inches. What is the probability that the annual snowfall for 1 randomly picked year will be below 75.4 inches? Round your answer to 3 decimal places.
The annual precipitation amounts in a certain mountain range are normally distributed with a mean of...
The annual precipitation amounts in a certain mountain range are normally distributed with a mean of 73 inches, and a standard deviation of 12 inches. What is the probability that the mean annual precipitation during 36 randomly picked years will be less than 75.8 inches?
The amount of annual snowfall in a certain mountain range is normally distributed with a mean...
The amount of annual snowfall in a certain mountain range is normally distributed with a mean of 70 inches and a standard deviation of 10 inches. If X` represents the average amount of snowfall in 5 years, find k such that P(X`<k)=0.85. Round your answer to 3 decimal places. Group of answer choices 80.364 65.365 46.825 74.635 93.175
The amount of snow falling in a certain mountain range is normally distributed with a mean...
The amount of snow falling in a certain mountain range is normally distributed with a mean of 110 inches, and standard deviation of 16 inches. What is the probability that the mean annual snowfall during 64 randomly pick years will exceed 112.8 inches? Round your answer to four decimal places a.) 0.0026 b.) 0.4192 c.) 0.0808 d.) 0.5808
1. The weekly salaries of teachers in one state are normally distributed with a mean of...
1. The weekly salaries of teachers in one state are normally distributed with a mean of 560.0 dollars and a standard deviation of 39.0 dollars. What is the probability that a randomly selected teacher earns more than 605.0 a week? SELECT ALL APPLICABLE CHOICES A) 87.57187%87.57187% B) 14.42813%14.42813% C) 8.428135%8.428135% D) 4.428135%4.428135% E) 12.42813%12.42813% F) None of These 2. The annual precipitation amounts in a certain mountain range are normally distributed with a mean of 85 inches, and a standard...
the following questions are either true or false answers 1. The Central Limit Theorem allows one...
the following questions are either true or false answers 1. The Central Limit Theorem allows one to use the Normal Distribution for both normally and non-normally distributed populations. 2. A random sample of 25 observations yields a mean of 106 and a standard deviation of 12. Find the probability that the sample mean exceeds 110. The probability of exceeding 110 is 0.9525. 3. Suppose the average time spent driving for drivers age 20-to-24 is 25 minutes and you randomly select...
1a) Assume the annual day care cost per child is normally distributed with a mean of...
1a) Assume the annual day care cost per child is normally distributed with a mean of $8000 and a standard deviation of $500. In a random sample of 120 families, how many of the families would we expect to pay more than $7295 annually for day care per child? P(x > 7295) = ____% The number of families that we expect pay more than $7295 is _____ 1b) A machine used to fill gallon-sized paint cans is regulated so that...
Question: The probability that a standard normal variable, Z, is below 1.96 is 0.4750. (T/F) Question-After...
Question: The probability that a standard normal variable, Z, is below 1.96 is 0.4750. (T/F) Question-After an extensive advertising campaign, the manager of a company wants to estimate the proportion of potential customers that recognize a new product. She samples 120 potential consumers and finds that 54 recognize this product. She uses this sample information to obtain a 95 percent confidence interval that goes from 0.36 to 0.54. True or False: 95 percent of the people will recognize the product...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT