sir pano pag ganto? If a sample is drawn from a population, what happens to the standard error of the mean and the shape of the distribution if the sample size is increased from 50 to 200?
Paano po pag ganito walang value ng x? Records indicate that the value of dwellings in a certain city is skewed to the right, with a mean of ₱1.4 million and a standard deviation of ₱600,000. To check the accuracy of the records, the city officials plans to conduct a detailed appraisal of 100 dwellings, selected at random. Obtain an approximate sampling distribution model for the sample mean value of the dwellings selected.
A population of size N = 300 has μ = 57.3 and standard deviation of σ = 23.8. What is the probability that a random sample of size n = 35 will have a mean of 58.5 below. Sir ano po yung sign sa 58.8 below? Less than po ba or less than or equal to?
Is it allowed to assume a negative z score as positive and take the value in normal table Z? How was it? While the cumulative distribution function in -1.38 is very far from 0.4162, it is 0.0838? Kindly explain.
@@MATHStorya With due respect Sir, I think it is safer to use the Cumulative Distribution Function (CDF) table of the Normal Distribution Curve since it directly gives the exact value of the area. Correct me if I'm wrong, but -1.36 will give us an area equal to 0.0838, and 0.86 will give an area equal to 0.8051 which will give us a total area of 0.8889, so the percentile for P(-1.038
@@MATHStorya Yes Sir! Exactly that's why we still need to apply this in -1.38 and 0.86 to give us the exact area (no short cuts). Again Sir, with due respect, we can't simply look for the value of a negative z-score in the Normal Distribution Table, that is a "mortal sin".
To make it simple Sir, we know exactly that the Sampling Distribution is just an approximation of the Normal Distribution, the curve becomes closer and closer as the sample increases. So, it is not ethical to assume that the normal curve is the same as the curve in the sampling distribution and their z-score as well. There must be a deviation. 0.4162 is almost 0.5, which is far from our shaded area in the curve, it must be the area bounded from 0.5 - 0.4162 which is 0.0838.
@@MATHStorya Sir, you used the standard normal table in this video. Is it different from the positive and negative z-score tables which show the area to the left of the distribution under the curve? Should I use the SNT when solving problems involving the Central Limit Theorem?
Sir kahit po positive yung zscore niya mag miminus parin po kayo pag hindi nasali ang central area yung pag shade? Ganun po ba? Medyo nalilito po kasi ako.
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sir pano pag ganto?
If a sample is drawn from a population, what happens to the standard error of the mean and the shape of the distribution if the sample size is increased from 50 to 200?
Sir in normal form table z value is comparing with 0.2,0.3 like that how can you say the z value is comparing with 0.3 only 0.6 like that
Can you explain why we need to use 0,5 in 0,5 + P(A) or 0,5 - P(A) when a value greater than or less than?
Is this a standard value?
Means alot... this video helped me very much
to understand the central limit theorem
Thank you also…
salamat po!! Ika'y hulog nang langit!!!!
You’re welcome
Paano po pag ganito walang value ng x?
Records indicate that the value of dwellings in a certain city is skewed to the right, with a mean of ₱1.4 million and a standard deviation of ₱600,000. To check the accuracy of the records, the city officials plans to conduct a detailed appraisal of 100 dwellings, selected at random. Obtain an approximate sampling distribution model for the sample mean value of the dwellings selected.
madali lang po ito....just make a sampling distribution model but first solve for sample standard deviation.
A population of size N = 300 has μ = 57.3 and standard deviation of σ = 23.8. What is the probability that a random sample of size n = 35 will have a mean of 58.5 below.
Sir ano po yung sign sa 58.8 below? Less than po ba or less than or equal to?
Below 58.8 is less than or to the left.
Hala sir thank you po ng marami
Happy to help... Ingat
Is it allowed to assume a negative z score as positive and take the value in normal table Z? How was it? While the cumulative distribution function in -1.38 is very far from 0.4162, it is 0.0838? Kindly explain.
Using that table mean at the center…we can have the same value..
For negative z to the left always 0.5 minus the area…
@@MATHStorya With due respect Sir, I think it is safer to use the Cumulative Distribution Function (CDF) table of the Normal Distribution Curve since it directly gives the exact value of the area. Correct me if I'm wrong, but -1.36 will give us an area equal to 0.0838, and 0.86 will give an area equal to 0.8051 which will give us a total area of 0.8889, so the percentile for P(-1.038
@@MATHStorya Yes Sir! Exactly that's why we still need to apply this in -1.38 and 0.86 to give us the exact area (no short cuts). Again Sir, with due respect, we can't simply look for the value of a negative z-score in the Normal Distribution Table, that is a "mortal sin".
To make it simple Sir, we know exactly that the Sampling Distribution is just an approximation of the Normal Distribution, the curve becomes closer and closer as the sample increases. So, it is not ethical to assume that the normal curve is the same as the curve in the sampling distribution and their z-score as well. There must be a deviation. 0.4162 is almost 0.5, which is far from our shaded area in the curve, it must be the area bounded from 0.5 - 0.4162 which is 0.0838.
Sir ano po yung gamit nyo na z table
Makita mo yan sa google…search lang z table
@@MATHStorya opooo sirr nakita ko na salamat po💕
@@MATHStorya Sir, you used the standard normal table in this video. Is it different from the positive and negative z-score tables which show the area to the left of the distribution under the curve? Should I use the SNT when solving problems involving the Central Limit Theorem?
@@mariel98210 the same result…
sir when po mag paplus or minus ng .50? mejo nagegets ko po need lang malinawan hihi
Pag wala sa center line ang shaded area then minus but if included ang center line sa shaded area, then plus.
@@MATHStorya ohhh salamat poooo
Sir kahit po positive yung zscore niya mag miminus parin po kayo pag hindi nasali ang central area yung pag shade? Ganun po ba? Medyo nalilito po kasi ako.
@@itsross577 yes po...like this example ua-cam.com/video/KA4G9mWONvU/v-deo.html .... check 3:15 for this video.
Thank you sir! Na gets ko na po siya ngayon.