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Here is my test question: at a university in 1985, a proportion of .47 of sociology majors were women. You assess the gender composition of a random sample of 187 sociology majors at the same university today and discover 105 females. Test a hypothesis to see if this proportion has changed since 1985. I have the t-score of 1.660 an a standard error of .036. I hope they are correct, but also need the test effect and test statistic, p-value.
We can compare two sample means to determine if the samples were obtained from normal populations with the same mean using the "t" distribution.
Estimate the indicated probability by using the normal distribution as an approximation to the binomial distribution.
Explain whether the symmetry definition of probability is appropriate with respect to the outcomes in the sample space.
The average gas mileage of a certain model car is 29.0 miles. If the gas mileages are normally distributed with a standard deviation of 0.6 miles per gallon, find the probability that the car has a gas mileage of between 28.8 and 29.2 miles per ga..
The number of widgets produced by 9 employees in an eight hour shift is recorded as: 135, 120, 116, 119, 121, 125, 135, 131, 123. What is the median of the number of widgets produced presented above?
A portfolio p of consisting 60% of stock X and 40% of stock Y, has a correlation ρpM = 0.62 with the market. What is the portfolio volatility? Statement on the diversification effect.
Binomial distribution to find out the mean also standard deviation. Variance and standard deviation of a lot of 300 calculators.
How long do new batteries last on a camping trip? A random sample of n1 = 42 small camp flashlights were installed with brand I batteries and left on until the batteries failed.
Research on new juvenile delinquents revealed that 38% of them committed another crime. What is the probability that 40 or fewer of the delinquents will commit another crime?
Identify your research question, your research (alternative) hypothesis, and your null hypothesis. Also, identify your independent and dependent variable.
Determine the rejection region for the hypothesis Ho : mean D= 0 if H a : mean D > 0. Use a = 0.01. z>
What is the population mean? What is the best estimate of that value?
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