Question

The common toad has a mean lifespan of 9 years and a standard deviation of 3...

The common toad has a mean lifespan of 9 years and a standard deviation of 3 years. If a biologist tracks a random sample of 100 toads, find the standard deviation, , for the sampling distribution of the sample mean toad lifespan

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

Homework Answers

Answer #1

solution:

sample distribution of sample mean is ,

=

= 9

sampling distribution of standard deviation

=  / n = 3 / 100

= 0.3

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
Suppose x has a distribution with a mean of 20 and a standard deviation of 3....
Suppose x has a distribution with a mean of 20 and a standard deviation of 3. Random samples of size n = 36 are drawn. Is the sampling distribution of x normal? How do you know? What is the mean and the standard deviation of the sampling distribution of x? Find the z score corresponding to x = 19. Find P (x < 19). Would if be unusual for a random sample of size 36 from the x distribution to...
The population has mean μ=29 and standard deviation σ=9. This distribution is shown with the black...
The population has mean μ=29 and standard deviation σ=9. This distribution is shown with the black dotted line. We are asked for the mean and standard deviation of the sampling distribution for a sample of size 34. The Central Limit Theorem states that the sample mean of a sample of size n is normally distributed with mean μx¯=μ and σx¯=σn√. In our case, we have μ=29, σ=9, and n=34. So, μx¯=29 and σx¯=934‾‾‾√=1.5 This distribution is shown with the red...
A dishwasher has a mean life of 10 years with an estimated standard deviation of 1.05...
A dishwasher has a mean life of 10 years with an estimated standard deviation of 1.05 years ("Appliance life expectancy," 2013). The life of a dishwasher is normally distributed. Suppose you are a manufacturer and you take a sample of 10 dishwashers that you made. State the random variable. Find the mean of the sample mean. Find the standard deviation of the sample mean. What is the shape of the sampling distribution of the sample mean? Why? Find the probability...
A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25...
A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25 years ("Appliance life expectancy," 2013). The life of a dishwasher is normally distributed. Suppose you are a manufacturer and you take a sample of 10 dishwashers that you made. State the random variable. Find the mean of the sample mean. Find the standard deviation of the sample mean. What is the shape of the sampling distribution of the sample mean? Why? Find the probability...
A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25...
A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25 years ("Appliance life expectancy," 2013). The life of a dishwasher is normally distributed. Suppose you are a manufacturer and you take a sample of 10 dishwashers that you made. State the random variable. Find the mean of the sample mean. Find the standard deviation of the sample mean. What is the shape of the sampling distribution of the sample mean? Why? Find the probability...
A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25...
A dishwasher has a mean life of 12 years with an estimated standard deviation of 1.25 years ("Appliance life expectancy," 2013). The life of a dishwasher is normally distributed. Suppose you are a manufacturer and you take a sample of 10 dishwashers that you made. a.) State the random variable. b.) Find the mean of the sample mean. c.) Find the standard deviation of the sample mean. d.) What is the shape of the sampling distribution of the sample mean?...
The lifespan (in years) of the common house cat is best modeled using a normal curve...
The lifespan (in years) of the common house cat is best modeled using a normal curve having mean 12.9 and standard deviation 2.8. Suppose a sample of 36 common house cats are selected at random. Would it be unusual for this sample mean to be more than 14.1 years?
New heat lamps are reported to have the mean lifespan of 100 hours with a standard...
New heat lamps are reported to have the mean lifespan of 100 hours with a standard deviation of 15 hours. Before replacing their current lamp to the new heat lamps for the university, OSU decided to test whether the mean lifetime is equal to 100 or not by sampling 36 heat lamps. They turned them on and recorded the time, in hours, until each lamp failed. The sample provided a mean lifespan is 105.1 hours. a) According to the Central...
1. A population has a mean of 200 and a standard deviation of 50. A simple...
1. A population has a mean of 200 and a standard deviation of 50. A simple random sample of size 100 will be taken and the sample mean will be used to estimate the population mean. a. What is the expected value of the sample mean? b. What is the standard deviation of the sample mean? c. Confirm whether the Central Limit Theorem is met and explain it’s significance. d. Draw the sampling distribution of the sample mean. e. What...
A population has a mean of 75 and a standard deviation of 27. Find the mean...
A population has a mean of 75 and a standard deviation of 27. Find the mean and standard deviation of a sampling distribution of sample means with sample size of 81.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT