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What is the area under the normal curve between z = -1.0 and z = -2.0?
Please use a combination of content and supportive examples.
A behavioral research situation that could use a Pearson coefficient research study and a chi square research study. Present the rationale for each selection. Be very specific in your presentation.
A random sample of 12 batteries yields X-bar = 34.2 hours and s = 5.9 hours. Give a 95% confidence interval for the average life of a battery.
The distance travelled (in km) by a courier service motorcycle on 40 trips were recorded by the driver. Define the random variable and the data type.
Suppose that 98% of the customers in your market have Internet access, and you select a random sample of 500 customers. What is the probability that the sample has:
From this small sample, the mean heart rate is 90 beats per minute with a standard deviation of 5. Find a 98% confidence interval for the true mean heart rate of all people with this untreated condition.
In a test of the independence of two variables, one the variables has two possible categories and the other has three possible categories.
The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch wili be rejected?
What is the probability that the mean starting salary is between $31,000 and $33,000 - Graduates from a graphic arts course at a community college have a mean starting salary
Assuming 12=22, use a significance level of =.05 test to the null hypothesis H0: 1 - 2 = 0 against the alternative H1: 1 - 2 > 0. Does the test reject H0?
Is this sample sufficient to conclude that the eye-spots have a significant influence on the birds' behavior? Use a two-tailed test with α= .05. Compute the estimated Cohen's d to measure the size of the treatment effect.
How many commuters must be randomly selected to estimate the mean driving times of Chicago commuters? If we want 99% confidence that the sample mean is within 2 minutes of the population mean, and the population standard deviation is known to be 1..
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