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In a survey of women in a certain country (ages 20-29) the mean height was 64.5 inches with a standard deviation of 2.75 inches. What height represents the 90th percentile? What height represents the first quartile?
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
The first unit produced after the calibration effort to be found to be defective. What is the probability that machine is in adjustment?
The given data show the age distribution of top 14 doctors in emergency faculty of local hospital.
How many departments would they need to survey to achieve this level of accuracy with 95% confidence?
Use a test of the difference between proportions when answering these questions.
A researcher conducts some research in which they identify a significant positive correlation (r =0.42) between the number of children a person has and their life satisfaction. Which of the following is it inappropriate to conclude from this resea..
Which statement about re-expressing data is not true? I. Unimodal distributions that are skewed to the right will be made more symmetric by taking the square root of the variable.
Discuss three measures of central tendency for the dependent variable. Is this distribution skewed? If so, in what direction? Explain your answer. Why would you NOT attempt to determine the central tendency of the independent variables?
A recent article in the Arizone Republic indicated that the mean sellingprice of the homes in the area is more than $220,000. Can we conclude that the mean selling price in the Goodyear, AZ area is more than $220,000.
How many degrees of freedom should the researcher use in her t-test critical value assuming that the variances are equal?
Would the null hypothesis be accepted or rejected in this case?
What are the pros and cons of selecting an established theoretical or conceptual model or framework? What are the pros and cons of creating/developing your own?
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