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Find the test statistic value for two mean tests in large sample.
A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. At α = .05, what is the test value?
Women
Men
Sample size
40
70
Mean effect
7
6.75
Sample variance
2.5
4.5
a. 0.70
b. 1.97
c. 0.36
d. 1.42
A researcher selects a random example of college students and measures number of hours they spend watching television per week and their grade point average.
Use the continuity correction and describe the region of normal curve that corresponds to the indicated binomial probability. The probability of more than 50 right answers.
Determine percentage of employees has 5 dependents? Of all employees which have at least one dependent, determine percentage has more than one?
The ages of cars owned by all employees of a large company have a bell shaped distribution with a mean of 8 years and a standard deviation of 2 years. Using the empirical rule, find the approx. percentage of cars (owned by those employees) that are b..
Determine the variance of firm's profit for the month.
Assume that flight times from SAN to ATL are exponentially distributed with a mean of 4.5 hours and a standard deviation of 0.2 hours. Assume that you must fly from SAN to ATL weekly for the lucrative consulting engagement for one year (52 flight..
Compute the value of t. What is your decision regarding the null hypothesis?
Determine if there is a linear correlation between annual income and the amount of insurance? What is the linear regression line for this data?
What is the OR of getting cancer fora late child birth woman compared to an early first birth woman?
Find the probability that a women develops breast cancer given that she has a family history of breast cancer._____________
The data in the scatterplot below are an individual's weight and the time it takes (in seconds) on a treadmill to raise his or her pulse rate to 140 beats per minute. The o's correspond to females and the +'s to males.
Elucidate correlation coefficient of determination R-square also Adjusted R-square. A computer utility was implimentated to the data collected in a study of a generalized health.
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