## PSY 325 Week 3 Discussion Question 1 Recent

PSY 325 Week 3 Discussion Question 1 Recent

**When comparing data from different distributions, what is the benefit of transforming data from these distributions to conform to the standard distribution?**

**What role do z scores play in transforming data from multiple distributions to the standard normal distribution?**

**What is the relationship between z scores and percentages?**

**Give an example of a variable likely to be normally distributed in the population and explain how z scores pertaining to that variable would be useful in a real-life situation**

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**PSY 325 Week 2 Quiz Set 1**

**1. Question : The table value z = .70 is .2580. The z = .70 value occurs at what equivalent percentile?**

**2. Question : Rejecting the null hypothesis is the same as saying _____________.**

**3. Question : If the z transformation is used with population data, M is replaced by what symbol?**

**4. Question : How does the standard normal distribution differs from other normal distributions?**

**5. Question : A one-sample t value is statistically significant in which situation?**

**6. Question : All standard scores have which characteristic in common?**

**7. Question : If x = 12, M = 10 and s = 2, z = _______.**

**8. Question : The distribution of sample means refers to _______________.**

**9. Question : A distribution where the mean and standard deviation have pre-determined values calls for ________. **

**10. Question : If the mean of the distribution of sample means isn’t given, how is it determined?**

**PSY 325 Week 2 Quiz Set 2**

** **

**Question :The table value z = .70 IS 2580. What percent of the population occurs below that point?**

**The z-test asks whether the population from which thesample was drawn has the same mean as the population to which it is compared True.**

**Question 3**

**4. Based on past experience, the probability that the sun will rise tomorrow is?**

**5 Rejecting the null hypothesis is the same as saying?**

**6 How many standard deviations below is 3 if z= -1.75**

**7 Degrees of Freedom refers to**

** How many values can vary**

**8 If instead of z = (x – M) / s the formula is x = z(s) + M, what is the result?**

**9 How does standard normal distribution differ from other normal distributions?.**

**10 What is the similarity between the z test and one sample t test?**

**PSY 325 Week 2 Quiz Set 3**

**Based on past experience, the probability that the sun will rise tomorrow is ________.**

**The standard error of the difference is a measure of pooled variance.**

**The z scores is a ratio of difference to variability (t).**

**How is the z-test different from z-score analysis?**

**What advantage does the one-sample t offer over the z-test?**

** In a distribution for which the mean is 25 and the standard deviation is 5, what percentage of all scores occur at 30 or below?**

**Which is true of a one-tailed test?**

**The distribution upon which the z-test is based has a mean of 1.0.**

**In a distribution for which the mean is 25 and the standard deviation is 5, what percentage of all scores occur between 20 and 30?**

**The z-test asks whether the population from which the sample was drawn has the same mean as the population to which it is compared.**