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In 1974, Lotus and Palmer performed classic study showing how language used to ask question can affect eyewitness memory. In study, college students watched filmed of automobile accident and then were asked about what they saw. One group was enquired, questions what they saw. One group was enquired, "About how fast were cars going when they smashed into each other?" Another group was enquired same question expect verb was changed to hit" instead of smashed into" group reported significantly higher estimates of speed than hit" group. Assume the researcher repeats this study with sample of today's college students and obtains following results.
Estimated SpeedSmashed into Hit
n = 15 n = 15M = 40. 8 M = 34. 0SS = 510 SS = 414
Compute the sample variance and the sample standard deviation for these data (to 2 decimals).
The following estimated regression model was developed relating yearly income (Y in $1,000s) of 30 individuals with their age (X 1 ) and their gender (X 2 ) (0 if male and 1 if female).
Q2 is dummy variable equal to 1 in second quarter and 0 otherwise; and Q3 is final dummy variable equal to 1 in third quarter and 0 otherwise. Determine the Base Quarter?
In an article in the Journal of Management Information Systems, Mahmood and Mann investigate how information technology (IT) investment relates to company performance.
In other words, could you generate two sets of random numbers (of length, say, 50) and set out the calculations in detail to determine whether the random variables are independent using chi-squared.
An investment firm with 10,000 clients would like to accurately forecast the average dollar amount their current customer will deposit over the coming year.
How does multilinear regression analysis apply to your profession? Specify the dependent value and the set of predictors. Where would you get the data?
The probability that a person suffering from a migraine headache will obtain relief from a particular drug is 0.9. Three randomly selected sufferers from migraine headache are given the drug. Find the probability that the number obtaining relief w..
At α = .05, is there a difference in variances? Illustrate all steps clearly, including illustration of the decision rule.
Which approach is most preferred and why? Optimistic, conservative, or minimax regret. Also, is establishing the most appropriate approach before analysising the problem important for the decision maker?
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
A sample of 64 observations is selected from a normal population. The sample mean is 215, and the sample standard deviation is 15. Conduct the following test of hypothesis using the .03 significance level.
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