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There are four conditions/requirements that must be met in order to perform simple linear regression. For each of the conditions below, choose the technique that should be used to determine whether or not that the condition is met. (Each answer may be used once, more than once, or not at all.)
The probability distribution of ε is normal------?
The mean of the distribution of ε is 0 - or that E(ε)=0------?
A) Create a scatterplot of x vs. y
B) Plot residuals over time
C) Plot a histogram of the residuals
D) Plot residuals vs. y-hat
At the 5% level of significance, can we infer that the population mean weight of athletic men is lower than the population mean weight of non-athletic men by more than 2 pounds?
For which of the following situations is it appropriate to use a scatter diagram or scatter plot?
The article should include a margin of error and confidence interval. Discuss the subject matter in the article, and interpret the results and what the confidence interval and margin of error mean as they apply to the specific subject matter.
She wants to be 90% confident and be accurate within 5% of the true proportion. Find out the minimum sample size necessary.
Dinner B which costs $135.30 for dinner submitted by salesperson with mean cost of $117.50 and standard deviation of $30 per dinner?
Does smiling cause mood to rise (i.e., become more positive)? Sketch between-participants, within-participants, and matched-participants designs that address this question and discuss the advantages and disadvantages of each to yielding data that ..
The weights (in pounds) of a sample of five boxes being sent by UPS are: 12, 6, 7, 3, and 10.
At the .05 significance level, can we conclude that the guideline is still reasonable?
From the course text and research I am able to create a frequency band with a single number (ie. 10, 20, 30, etc.). However, I am having difficulty creating the band with a number range (ie. $0-$999,999 or $1,000,000-$5,000,000).
Find the 99% confidence interval for the population proportion.
The data is shown on the table. Is there a difference in mean SBP between treatments? Run the appropriate test at α= 0.05
If "fair" coin is tossed four times and comes up heads all four times, probability of heads on the fifth trial is?
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