6:40. The means of two samples of sizes 50 and 100 respectively are 54 1 and 50-3 andstandard deviations are 8 and 7. Obtain the standard deviation of the sample of size 150 obtainedcombining the two samples.twe

We have given that Sample sizes n1=50 , n2= 100 and means xbar1=54.1 , xbar2=50.3 And standard…

Answered: Le 6:40. The means of two samples of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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I need the answers ,b, c , d, f , g Thank you
Atli believes that there is a linear relationship between the temperature in Reykjavík and the sale of mittens in his shop. He signs down the temperature in Reykjavík 7 random days and bears It compares with total sales of mittens (in krónur) the same day. The temperature measured to Average 4 degrees the days of Atli measured, with the standard deviation of 3 degrees. The total settlement sales turned out on average 28400 krónur with the standard deviation of ISK 4920. The correlation Between the mitty sales and temperature measured -0.68. How much does the mitten change when the temperature rises by one degree according to the model? Sales decreased by ISK 1115.2. The sale increases by ISK 1115.2. Sales decreased by ISK 235.7. Sales do not change. Atli wants to examine whether it is actually correlated between the mitty sales and temperature. He performs The bilateral hypothesis test and the test size in his hypothesis test is -2.07. Which resolution does he draw? He cannot…
The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?
We are to estimate the mean of a population, u. The population variance is o. Both the population mean and varíance are unknown. I have twO suggestions as the estimators shown below, A and A2. Tell which one is better. Show all calculations and arguments. Az=
I have provided the answer. Please explain the answer.I
The lengths of pregnancies in a small rural village are normally distributed with a mean of 265 days and a standard deviation of 16 days. In what range would you expect to find the middle 95% of most pregnancies? Between and If you were to draw samples of size 59 from this population, in what range would you expect to find the middle 95% of most averages for the lengths of pregnancies in the sample? Between and Enter your answers as numbers. Your answers should be accurate to 1 decimal places. Question Help: Message instructor Submit Question 824 tv esc 20 888 F1 F2 F3 F4 F5 F6 @ # $ % & 1 2 4 Q W Y T
The lengths of pregnancies in a small rural village are normally distributed with a mean of 265 days and a standard deviation of 15 days. In what range would you expect to find the middle 50% of most pregnancies? Between and If you were to draw samples of size 58 from this population, in what range would you expect to find the middle 50% of most averages for the lengths of pregnancies in the sample? Between and Enter your answers as numbers. Your answers should be accurate to 1 decimal places.
2 If n=100, X = -20 , EX =220. Find standard deviation Select one: a. 2.1818 b. 2.2626 C. 1.477 d. 1.504
14:45. (a) For a normal distribution with mean u and standard deviation o, obtain the first and third quärtiles and also the quartile deviation. (b) For a normal distribution with mean 50 and s.d. 15, find Q, and Q3. dial. ao
Can someone explain the formulas used in these type of questions and where each number belongs in the formula The average size of a farm in Texas is 185 acres. The average size of a farm in Kansas is 220 acres. Assume that the data were obtained from two samples with standard deviations of 40 and 15 acres, respectively, and a sample size of 10 and 12, respectively. Can it be concluded with a=0.05 that the average size of the farms in the two states is different? Assume that the population is normally distributed.
No. 2 only. Give interpretation of your answer...

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Le 6:40. The means of two samples of sizes 50 and 100 respectively are 54·1 and 50-3 and standard deviations are 8 and 7. Obtain the standard deviation of the sample of size 150 obtained combining the two samples. twe