The weights of newborns are normally distributed with u = 7.3 lbs and o = 0.3 lbs. Use the appropriate z-score tablewhen necessary. Suppose 8 newborns are randomly selected.a.) What is the standard deviation of the sampling distribution of the sample mean?O 0.9125O 0.1061O 0.3000O 0.1936b.) Compute the z-score for a sample mean of 7.5.O 0.67O -1.89O 1.89O -0.67

Answered: Image /qna-images/answer/7573b9e1-5947-4e70-8a0b-742ddfb7c2db.jpg

Answered: The weights of newborns are normally…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

Find the standardized test statistic, t, to test the claim that p, . Two samples are randomly selected and come from populations that are normal. The sample statistics are given 2 below. Assume that o, to,. n = 11, n2 = 18, x,=5.4, x2 = 5.8, s, = 0.76, s, = 0.51 O A. -1.326 O B. - 2.123 OC. -1.546 O D. -1.821 Next S:47 PM 59 F Clear AE 11/23/2021 P Type here to search PrtSc Insert Delo F7 F8 F9 F10 F11 F12 F3 F4 F5 F6 F1 F2 @ %23 $4 & Bac 1 2 4 6. 8. Q Y + I/ 因 T %#3
44
Consider a sampling distribution with p=0.11 and samples of size n each. Using the appropriate formulas, find the mean and the standard deviation of the sampling distribution of the sample proportion. a. For a random sample of size n = 4000. b. For a random sample of size n = 1000. c. For a random sample of size n = 500.
Suppose that the weight of seedless watermelons is normally distributed with mean 6.1 kg. and standard deviation 1.5 kg. Let X be the weight of a randomly selected seedless watermelon. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - N( kg. b. What is the median seedless watermelon weight? c. What is the Z-score for a seedless watermelon weighing 6.6 kg? d. What is the probability that a randomly selected watermelon will weigh more than 6.5 kg? e. What is the probability that a randomly selected seedless watermelon will weigh between 6.7 and 7.7 kg? kg. f. The 80th percentile for the weight of seedless watermelons is
3. Determine the following from the graph. Show all your work. a. Determine the mean and standard deviation: PDF of a Random Variable ū 6.09 COM 0.04 · b) Draw a qualitative sketch of the CDF of the distribution shown. Be sure to show axis values and key values that are appropriate! 0 10 c) What type of distribution was the PDF of a Random Variable?
B. EVALUATE 1. A sample size of 36 is to be selected from a population that has a mean of p= 45 and standara deviation o of 10. %3D a. Find the mean of the sampling distribution b. Find the standard error of the sampling distribution. C. What is the probability that this sample mean will be between 40 and 50? 2. The height of grade 1 pupils are approximately normally distributed with a. If an individual pupil is selected at random, what is the probability that he or she has a height of H = 45 inches and o = 2. 42 and 47? b. A class of 30 of these pupils is used as a sample. What is the probability that the class mean is between 42 and 47? C. If a pupil is selected at random, what is the probability that is taller than 46 inches? d. A class of 30 of these pupils is used as sample. What is the probability that the class mean is greater than 46 inches?
Measurements for the length and width of a rectangular plastic covers for CDs are rounded to the nearest mm (so they are discrete). Let Xx denote the length and Y denote the width. The possible values of X are 129, 130, and 131 mm. The possible values of Y are 15 and 16 mm. The joint distribution is given by the following table: X=length 129 130 131 Y=width 15 0.12 0.42 0.06 16 0.08 0.28 0.04 The probability that a CD cover has width of 16 mm knowing that it has a length of 131 mm is:
Find the test statistic, t, to test the hypothesiis that p, = ,. Two samples are randomly selected and come from populations that are normal. The sample statistics are given below. Round to three decimal places, n,=25 n, = 30 X, =32 X2 = 30 $=1.5 %3D $2=1.9 O A. 1.986 O B. 4.361 O C. 2.892 券 O D. 3.287 Click to select your answer. 02/16/21 ch 2.3 Homework a 99+
O a. the OLS estimate of r is biased due to sample selection. O b.the OLS estimate of r is unbiased. Oc the error u is homoskedastic. O d. the OLS estimator is BLUE.
The prices of a sample of books at University A were obtained by two statistics students. Then the cost of books for the same subjects (at the same level) were obtained for University B. Assume that the distribution of differences is Normal enough to proceed, and assume that the sampling was random. 1. Find the test statistic for this test. t = ___ (Round to two decimal places as needed.) 2. Find the p-value for this test. p-value = ____ (Round to three decimal places as needed.) 3. What is the conclusion for this test?
A random sample of n = 78 measurements is drawn from a binomial population with probability of success 0.2. Complete parts a through d below. a. Give the mean and standard deviation of the sampling distribution of the sample proportion, p. The mean of the sampling distribution of p is The standard deviation of the sampling distribution of p is (Round to four decimal places as needed.) b. Describe the shape of the sampling distribution of p. OA. The shape of the sampling distribution of p is approximately normal because the sample size is large. OB. The shape of the sampling distribution of p is approximately uniform because the sample size is large. OC. The shape of the sampling distribution of p is approximately normal because the sample size is small. OD. The shape of the sampling distribution of p is approximately uniform because the sample size is small. c. Calculate the standard normal'z-score corresponding to a value of p = 0.32. The standard normal z-score corresponding to a…
what assumptions are required for a z-score hypthesis test? A. all of the above B. The score in the sample are independant observations C. the scores are obtained by random sampling D. the distribution of sample means is normal

SEE MORE QUESTIONS

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS