Statistics 101

... This is called one-sided because we are interested only in deviations from the null hypothesis in one direction. ...

... This is called one-sided because we are interested only in deviations from the null hypothesis in one direction. ...

MIS2502: Data Analytics Descriptive Statistics

... The p-value is a number between 0 and 1. • A small p-value (typically ≤ 0.05) indicates strong evidence against the null hypothesis, so you reject the null hypothesis. • A large p-value (> 0.05) indicates weak evidence against the null hypothesis, so you fail to reject the null hypothesis. ...

... The p-value is a number between 0 and 1. • A small p-value (typically ≤ 0.05) indicates strong evidence against the null hypothesis, so you reject the null hypothesis. • A large p-value (> 0.05) indicates weak evidence against the null hypothesis, so you fail to reject the null hypothesis. ...

Hwk 3

... that during the summer months on the average 4200 cars pass by the property each day. Being suspicious that this figure is might be a bit high, the management of the motel chain conducts its own study and obtains a mean of 4,038 cars per day and a standard deviation of 512 cars per day for observati ...

... that during the summer months on the average 4200 cars pass by the property each day. Being suspicious that this figure is might be a bit high, the management of the motel chain conducts its own study and obtains a mean of 4,038 cars per day and a standard deviation of 512 cars per day for observati ...

Hypothesis Testing

... We will begin with a null hypothesis, which states that there is no difference between the two groups being tested. A null hypothesis is often times the opposite of what is expected to happen. We use the null hypothesis so that we can allow the data to contradict it. In a randomized controlled exper ...

... We will begin with a null hypothesis, which states that there is no difference between the two groups being tested. A null hypothesis is often times the opposite of what is expected to happen. We use the null hypothesis so that we can allow the data to contradict it. In a randomized controlled exper ...

8.1-8.2 Review Sheet

... 3. The proportion of college graduates who obtain a job after graduation at least 62%. ...

... 3. The proportion of college graduates who obtain a job after graduation at least 62%. ...

Chapter 10: Confidence Intervals

... Significance Testing: ◦ A formal procedure for comparing observed data with a hypothesis whose truth value we want to ...

... Significance Testing: ◦ A formal procedure for comparing observed data with a hypothesis whose truth value we want to ...

1.017 Class 10: Common Distributions

... As rejection region grows Type I error increases and Type II error decreases (test is more likely to reject hypothesis). As rejection region shrinks Type I error decreases and Type II error increases (test is less likely to reject hypothesis) Usual practice is to select rejection region to insure th ...

... As rejection region grows Type I error increases and Type II error decreases (test is more likely to reject hypothesis). As rejection region shrinks Type I error decreases and Type II error increases (test is less likely to reject hypothesis) Usual practice is to select rejection region to insure th ...

Chapter 15

... we have concluded that the data are too unlikely to have occurred by chance alone. Thus, there is a relationship between the independent and dependent variable. Means we have rejected the null hypothesis Ho. ...

... we have concluded that the data are too unlikely to have occurred by chance alone. Thus, there is a relationship between the independent and dependent variable. Means we have rejected the null hypothesis Ho. ...

Week 1: Descriptive Statistics

... After 12 weeks, the level of depression in all subjects was measured and it was found that the mean level of depression (on a 10-point scale with higher numbers indicating more depression) was 4 for the experimental group and 6 for the control group. The most basic question that can be asked here is ...

... After 12 weeks, the level of depression in all subjects was measured and it was found that the mean level of depression (on a 10-point scale with higher numbers indicating more depression) was 4 for the experimental group and 6 for the control group. The most basic question that can be asked here is ...