Chapter 15: Sampling Distributions Statistics has two fields
... The distribution of sample proportions. p̂ = sample proportion Note: All samples have the same size n. They are taken from the same population. ...
... The distribution of sample proportions. p̂ = sample proportion Note: All samples have the same size n. They are taken from the same population. ...
252y0313
... You have not done a hypothesis test unless you have stated your hypotheses, run the numbers and stated your conclusion. Use a 95% confidence level unless another level is specified. 1. An airline president is tracking late arrivals and believes that the proportion is at most p 0 . Suppose that a sam ...
... You have not done a hypothesis test unless you have stated your hypotheses, run the numbers and stated your conclusion. Use a 95% confidence level unless another level is specified. 1. An airline president is tracking late arrivals and believes that the proportion is at most p 0 . Suppose that a sam ...
Lecture note
... Do you need to plot one? Use histogram. In many cases, you don’t need to plot a pdf by yourself. The most important matter is whether or not the distribution is skewed. If a distribution becomes really skewed, then the better central tendency becomes median or quantile mean rather than the sample me ...
... Do you need to plot one? Use histogram. In many cases, you don’t need to plot a pdf by yourself. The most important matter is whether or not the distribution is skewed. If a distribution becomes really skewed, then the better central tendency becomes median or quantile mean rather than the sample me ...
Probability is represented by area under the curve.
... With careful random sampling, there’s a good chance that the %’s in the sample will be close to the %’s in the population of interest. But the “answers” we get are random (because of the random sampling). Each different sample is going to give a different answer. In Statistics we use what we know ab ...
... With careful random sampling, there’s a good chance that the %’s in the sample will be close to the %’s in the population of interest. But the “answers” we get are random (because of the random sampling). Each different sample is going to give a different answer. In Statistics we use what we know ab ...
Lecture 3 slides
... What might you do to better assess the fairness of your coin? Turn to your neighbor to discuss these three ...
... What might you do to better assess the fairness of your coin? Turn to your neighbor to discuss these three ...
Question #1 / 9
... 5 The p-value: (Round to at least three decimal places). At the 0.05 level of significance, can it be concluded that the population mean height of treated plants is different 6 from 36 centimeters? ...
... 5 The p-value: (Round to at least three decimal places). At the 0.05 level of significance, can it be concluded that the population mean height of treated plants is different 6 from 36 centimeters? ...
STAT 3321 Test 2 – Summer 2008 – Name:
... yard of surface area should be no more than 9 bacteria/square yard]. The number of bacteria per square yard is assumed to be a poisson random variable. Assume that your hospital is at the maximum of the norm [true average = 9 bacteria/square yard] a. If you go into the hospital, randomly sample one ...
... yard of surface area should be no more than 9 bacteria/square yard]. The number of bacteria per square yard is assumed to be a poisson random variable. Assume that your hospital is at the maximum of the norm [true average = 9 bacteria/square yard] a. If you go into the hospital, randomly sample one ...
SAMPLE MULTIPLE CHOICE QUESTIONS FOR MIDTERM
... 4.) Suppose you have a random sample of 100 SFU students. In response to a short survey, each student reported the usual number of hours per week that he/she spent working off-campus (Xi), and the usual number of hours per week that he/she spent engaged in social activities (Yi). The university has ...
... 4.) Suppose you have a random sample of 100 SFU students. In response to a short survey, each student reported the usual number of hours per week that he/she spent working off-campus (Xi), and the usual number of hours per week that he/she spent engaged in social activities (Yi). The university has ...