Question

1.Suppose you have a sample of 100 distinct numbers, and exactly half of those numbers are...

1.Suppose you have a sample of 100 distinct numbers, and exactly half of those numbers are smaller than 65.   Which of the following does NOT describe the value 65?

2.The interquartile range of a population is 57, the first quartile is 25 and the minimum value in the population is 17. Which one of the following statements must be true?

The maximum value in the population is more than 90.

The range of the population is less than 57.

The standard devaition of the population is larger than 57.

The range of the population is greater than 57.

The standard deviation of the heights of a population of males is 24 and the standard deviation of the heights of a population of females is 15. This means that the [answer] of the male heights is higher than that of the female heights.

Patients arriving at a hospital for non-Covid-19 ailments are tested for Covid-19, in order to estimate the proportion of Covid-19 cases in a larger population. The tested patients are an example of a

convenience sample

simple random sample

census

stratified random sample

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

Homework Answers

Answer #1

2)

Q3 = Q1+IQR = 25+57 = 82

The range of the population is greater than 57. (because maximum value will be greater than 82)

===============

The standard deviation of the heights of a population of males is 24 and the standard deviation of the heights of a population of females is 15. This means that the [variation] of the male heights is higher than that of the female heights.

===========

Patients arriving at a hospital for non-Covid-19 ailments are tested for Covid-19, in order to estimate the proportion of Covid-19 cases in a larger population. The tested patients are an example of a

convenience sample

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
I need to have this done within 1 hour and a half. Thank You!:) 15. Minnesota...
I need to have this done within 1 hour and a half. Thank You!:) 15. Minnesota Department of Health wants to test the claim that variability in COVID-19 within Minnesota is greater than 12.75. For this, they took a sample of 90 days data and found that the mean is 275 and standard deviation was 15.67. Find the test value to test this claim.   Question 15 options: 72.41 73.23 98.75 109.38 110.61 16. Minnesota Department of Health wants to test...
9. Suppose another random sample of 100 persons is taken from the same population, and added...
9. Suppose another random sample of 100 persons is taken from the same population, and added to the sample of 7, for a total sample of 107 HIV infected individuals. How will the sample standard deviation of the 107 values compare in value to the sample standard deviation from the original sample of n=7? a. it will be larger b. it will be smaller c. it will be exactly the same value d. While the two values should be "similar",...
A normal population has a mean of 65 and a standard deviation of 13. You select...
A normal population has a mean of 65 and a standard deviation of 13. You select a random sample of 25.    Round to 4 decimal places. a. 19% of the time, the sample average will be less than what specific value? Value    b. 19% of the time, the value of a randomly selected observation will be less than h. Find h. h    c. The probability that the sample average is more than k is 36%. Find k....
A simple random sample of 100 postal employees is used to test if the average time...
A simple random sample of 100 postal employees is used to test if the average time postal employees have worked for the postal service has changed from the value of 7.5 years recorded 20 years ago. The sample mean was x¯ = 7 years with a standard deviation of s = 2 years. Assume the distribution of the time the employees have worked for the postal service is approximately Normal. The hypotheses being tested are H0 : µ = 7.5,...
1. Suppose a random sample of 100 elements is selected from a non-normally distributed population with...
1. Suppose a random sample of 100 elements is selected from a non-normally distributed population with a mean of µ = 30 and a standard deviation of σ = 8. a. What is the expected value of ?̅? b. What is the standard error of the mean ??̅? c. What is the sampling distribution of ?̅? Describe its properties. d. If we select a random sample of size n = 100, what is the probability that ?̅will fall within ±...
1.A population of values has a normal distribution with μ=213.2 and σ=86.8. You intend to draw...
1.A population of values has a normal distribution with μ=213.2 and σ=86.8. You intend to draw a random sample of size n=15. Find P73, which is the score separating the bottom 73% scores from the top 27% scores. P73 (for single values) = Find P73, which is the mean separating the bottom 73% means from the top 27% means. P73 (for sample means) = Enter your answers as numbers accurate to 1 decimal place. 2.A leading magazine (like Barron's) reported...
A random sample is selected from a population with mean μ = 100 and standard deviation...
A random sample is selected from a population with mean μ = 100 and standard deviation σ = 10. Determine the mean and standard deviation of the x sampling distribution for each of the following sample sizes. (Round the answers to three decimal places.) (a) n = 8 μ = σ = (b) n = 14 μ = σ = (c) n = 34 μ = σ = (d) n = 55 μ = σ = (f) n = 110...
Question 1 (1 point) Suppose that a sample of size 60 is drawn from a population...
Question 1 (1 point) Suppose that a sample of size 60 is drawn from a population with mean 88 and standard deviation 61 . Find the value of , the mean of the distribution of sample means. Wrtie only a number as your answer. Your Answer: Question 2 (1 point) Suppose that a sample of size 68 is drawn from a population with mean 64 and standard deviation 46 . Find the value of , the standard deviation of the...
1. For a standard normal distribution, given: P(z < c) = 0.9353 Find c. 2. A...
1. For a standard normal distribution, given: P(z < c) = 0.9353 Find c. 2. A population of values has a normal distribution with μ=195.6μ=195.6 and σ=42.9σ=42.9. You intend to draw a random sample of size n=203n=203. What is the mean of the distribution of sample means? μ¯x=μx¯= What is the standard deviation of the distribution of sample means? (Report answer accurate to 2 decimal places.) σ¯x=σx¯= 3.A population of values has a normal distribution with μ=5.8μ=5.8 and σ=80σ=80. You...
Suppose you have selected a random sample of ?=14 measurements from a normal distribution. Compare the...
Suppose you have selected a random sample of ?=14 measurements from a normal distribution. Compare the standard normal ? values with the corresponding ? values if you were forming the following confidence intervals. (a)    90% confidence interval z= t= (b)    95% confidence interval z=   t= (c)    98% confidence interval ?= t= 2) A confidence interval for a population mean has length 20. a) Determine the margin of error. b) If the sample mean is 58.6, obtain the confidence interval. Confidence interval: ( ,...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT