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Test the significant difference between two mean.
We recalculated our comparison of ideal number of children, this time only for women, separating them into two groups, those who indicated that they were "very happy" or "not at all happy" with life. Results are presented below.
Very Happy
Not Happy at All
Mean ideal number of children
3.32
2.07
Standard deviation
2.91
1.52
V
338
119
Obtained t statistic
1.99
Based on a two-tailed test, α = 0.05. What do you conclude?
Compare 2 moving averages using MSE and compute Exponential smoothing. The subsiquent data which represents demand for company ABC's products for the last 10 months.
To determine if this is evidence that students perform worse under uncomfortable conditions, The P-value of a test
Based on the scatter diagram, does there appear to be any relationship between the number of assemblers and production? Explain.
What is the relationship between the variance and the standard deviation?
At the .01 level of significance, is the true mean greater than 10?
Would the null hypothesis be accepted or rejected in this case?
Two independent samples of sizes 16 and 26 were taken. In a test of equality of population means of the two samples, how many degrees of freedom are associated with the critical t-value?
Below are the sample times in minutes. At the .05 significance level, can we conclude that there is a difference in their mean times?
Using 5% level of significance, is there any difference in proportion of guests who would select the two resorts? What is your conclusion?
If p denotes the p -value of the corresponding hypothesis test, which of the following is true?
Determine the probability that the project will be completed in 70 days or less.
Using the simple test of independence (described in the lecture), decide if the events high calorie and high fiber are independent or dependent. Show your work.
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