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65% of all single men would welcome a woman taking the initiative in asking for a date. Twenty single men were chosen at random and were asked if they would welcome a woman taking the initiative in asking for a date. What is the probability that seven (7) of the men say NO.
Compute the appropriate test statistic to test Ho: p = 80/100 vs. Ha: p > 80/100.
Payne (2001) gave participants a computerized task in which they first see a face and then a picture of either a gun or a tool. The task was to press one button if it was a tool and a different one if it was a gun.
On which test did he do better compared to the rest of the class?
A doctor suspected that smokers between 40 and 50 with lung disease had been smoking on average more than 20 years - significance level is there sufficient evidence to justify the doctors belief?
Discuss a hospitals total maintenance costs, and use regression analysis to estimate the fixed cost element of maintenance and the variable cost associated with the number of patient-days.
What could Bristol Myers have done to improve the validity of the results after they had mailed the 10,000 surveys and received 1,983 back? Assume they kept record of who had responded and who had not.
Find out the following Standard deviation of the swipe rate, What percentage of subway riders should re-swipe the card as they were outside acceptable range?
Data collected by a child development scientist produced a 95% confidence interval for the mean age, μ (in weeks) at which babies began to craw as [21.4, 31.6]
"What is the five-step process for hypothesis testing? Is the order important? Why or why not?"
When filter permits spam to slip through into your inbox, which type of error is that? Which type of error is it when the real message gets classified as junk?
The variance of the return per share is 4 for stock 1 and 100 for stock 2. The covariance of the return between the two stocks is 5 per share. Use the total variance of the investment as investment risk.
Repeat this process 10 times or you can draw 10 samples simultaneously using StatTools. Make a histogram of the 10 values of sample means. You are constructing the sampling distribution of sample means. What is the center of your histogram?
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