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The closing price of a company's stock tomorrow can be lower, higher or the same as today's closed. Without any prior information that may affect the price of the stock tomorrow, the probability that it will close higher than today's close is 1/3
Which of the following statements regarding the coefficient of correlation is true. A value of 0.00 indicates two variables are not related.
Carry out test of independence to find out whether employee health insurance coverage is independent of size of company. Use α = 0.05 level of significance.
If the population standard deviation is s = 10, is the sample sufficient to demonstrate a significant effect? Again, assume a two-tailed test with a = 0.05.
One of the most important uses of a correlation is its potential use in_________
Construct a 95% confidence interval for the proportion and calculate the P value for the given test.
Inspect table produced in question 2 above. Comment on relative sensitivity of minimum sample size to actual proportion and to desired half width.
A study published in the New England Journal of Medicine (Aug. 2001) suggests that it's dangerous to enter a hospital on a weekend. During a 10-year period, researchers tracked over 4 million emergency admissions to hospitals in Ontario, Canada. T..
Here are fifty observations on the weight of tea bags. Create mean, mode and median.
Set up dummy coded dummy variables to contrast each of the other groups to Group 2, medium Anxiety; run a regression to predict exam performance (Y) from these dummy coded dummy variables.
Computing the probability values using normal distribution - what proportion have SAT scores greater than 550?
Caselet on McDonald’s vs. Burger King - Waiting time
What percentage of the averages or medians of the sample will be greater than 140 seconds?
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