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A researcher wants to see if there is a relationship between birth order and personality. A sample of n = 100 people is obtained, all of whom grew up in 3-child families. On the basis of the frequencies shown below, can the researcher conclude that there is a significant difference at the .05 level?
Outgoing - 1st Birth Position (BP) - 13, 2nd BP - 31, 3rd BP - 16
Reserved - 1st Birth Position (BP) - 17, 2nd BP - 19, 3rd BP - 4
Create a 95% confidence interval for the population mean days absent for sickness based on this sample. Select the answer closest to your results.
To determine if this is evidence that students perform worse under uncomfortable conditions, The P-value of a test
In healthy adults, x is approximately normally distributed with mean µ = 38 and standard deviation σ = 12. What is the probability that:
What is a probability notation? What are the advantages and disadvantages of using a probability notation? How does probability notation aid in decision making?
A group of students collected data at the Cedar Point amusement park and reported that the "wait time" to ride the "Top Thrill Dragster" roller coaster is consistently distributed within a range of 40 minutes to 90 minutes.
What happens to the confidence interval when we go from a 95% confidence level to a 99% confidence level? Is this desirable? When would we want to use a 99% confidence interval?
a. What is the probability of a type I error? b. Give the formula for the test statistic.
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
By how much does the standard error of x-bar change if the sample is increased to 100?
In a particular region of Rhode Island, it is known that fisherman's trap on average of 32 pounds of lobster per day with a standard deviation of four pounds.
Suppose you are given the following estimated regression equation: Debt Ratio = 4000 + .20 Cash Flow. If the t-stat for the slope estimate is 3.25, what can you conclude?
Based on these results, the proportion of the variation in 1993 winnings that is explained by the average number of putts per round and driving distance
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