ZuoTi.Pro
Question

(6 pts) Suppose you have selected a random sample of n 7 measurements from a normal distribution. Compare the standard normal z values with the corresponding t values if you were forming the following confidence intervals. (a) 80% confidence interval (b) 90% confidence interval (c) 95% confidence interval
math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

Solution:-

a)

For 80% confidence interval

z = + 1.282

D.F = n - 1

D.F = 6

t = + 1.44

b)

For 90% confidence interval

z = 1.645

D.F = n - 1

D.F = 6

t = + 1.943

c)

For 95% confidence interval

z = 1.96

D.F = n - 1

D.F = 6

t = + 2.447

0 0
Add a comment
Know the answer?
Add Answer to:
(6 pts) Suppose you have selected a random sample of n 7 measurements from a normal...
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. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Suppose you have selected a random sample of n=9 measurements from a normal distribution. Compare the...

    Suppose you have selected a random sample of n=9 measurements from a normal distribution. Compare the standard normal zz= values with the corresponding t values if you were forming the following confidence intervals. (a)    98% confidence interval z= t= (b)    95% confidence interval z= t= (c)    99% confidence interval z= t=

  • Assume a random sample of n = 5 measurements from a normal distribution. Compare the standard...

    Assume a random sample of n = 5 measurements from a normal distribution. Compare the standard normal z-values with the corresponding t-values if you were forming a 99% confidence interval.

  • the random sample shown below was selected from a normal distribution 7, 6 , 5 ,...

    the random sample shown below was selected from a normal distribution 7, 6 , 5 , 6 , 9 , 3 a.) construct a 90% confidence interval for the population. mean U (__,__) b assume that sample mean x and sample standard deviation s remain exactly the same as those just calculated but that are based on a sample of n=25 observations. What is the effect of increasing the sample size in the width of the confidence intervals?

  • (1 point) A random sample of n measurements was selected from a population with unknown mean...

    (1 point) A random sample of n measurements was selected from a population with unknown mean u and standard deviation o. Calculate a 90% confidence interval for p for each of the following situations: (a) n = 100 = 102.2, s = 2.28 << (b) n=90, Z = 84.8, s = 2.19 <u (c) n = 80, Z = 55.8, s 2.48 << (d) n=90, = 76.3, s = 2.68 Sus Note: You can earn partial credit on this problem.

  • Suppose that X . . . . . Xn is a random sample from a normal...

    Suppose that X . . . . . Xn is a random sample from a normal population with unknown mean μ x and unknown variance σ I. What is the form of a 95% confidence interval for μχ . Îs your interval the shortest 95% confidence interval for μχ that is avail- able? 2. What is the form of a 95% confidence interval for . Is your interval the shortest 95% confidence interval for σ,' that is avail- able? 3....

  • and for 2. A random sample of n measurements is selected from a population with unknown...

    and for 2. A random sample of n measurements is selected from a population with unknown mean known standard deviation o = 10. Calculate the width of a 95% confidence interval for these values of n: a. n=100 b. n=200 c. n=400 d. n=1000 e. n=2000

  • just got b wrong (1 point) A random sample of n measurements was selected from a...

    just got b wrong (1 point) A random sample of n measurements was selected from a population with unknown mean u and standard deviation o. Calculate a 90% confidence interval for u for each of the following situations: (a) n= m = 100, 7 100, = 102.2, s = 2.28 su < 101.825 102.575 (b) n = 90, z = 84.8, s = = 2.19 184.420 su < 185.180 (c) n 80, # 55.8, s = 2.48 su < 55.3444...

  • The random sample shown below was selected from a normal distribution 7, 3, 9, 8, 3,6...

    The random sample shown below was selected from a normal distribution 7, 3, 9, 8, 3,6 Complete parts a and b. a. Construct a 95% confidence interval for the population mean μ (Round to two decimal places as needed.) b. Assume that sample mean x and sample standard deviation s remain exactly the same as those you just calculated but that are based on a sample of n -25 observations. Repeat part a. What is the effect of increasing the...

  • The random sample shown below was selected from a normal distribution. 3, 10, 4, 6, 8,...

    The random sample shown below was selected from a normal distribution. 3, 10, 4, 6, 8, 5 a. Construct a 95​% confidence interval for the population mean mu. (Round to two decimal places as​ needed.) b. Assume the sample mean x and sample standard deviation s remain exactly the same as those who just calculated but that are based on a sample of n=25 observations. repeat part a. what is the effect of increasing the sample size on the width...

  • A random sample of n measurements was selected from a population with unknown mean μ and...

    A random sample of n measurements was selected from a population with unknown mean μ and standard deviation σ = 35 for each of the situations in parts a through d. Calculate a 99​% confidence interval for μ for each of these situations. a. n = 75, x = 20 Interval: ( _____, _____ ) b. n = 150, x = 104 Interval: ( _____, _____ ) c. n = 90, x = 16 Interval: ( _____, _____ ) d....

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT