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A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is
less than 74between 74 and 76between 76 and 77greater than 77
Millie and Senta Meter have recently taken Pre and Post test in achievement. The test were normally distributed. Millie's percentile rank changed from 57.93 to 77.34. Senta's changed from 1.07 to 4.95.
How does the bell-shaped curve for the sampling distribution of sample means for samples of size n = 100 compare to the bell-shaped curve for sampling distribution of sample means for samples of size n = 60.
Determine the level of measurement for these items related to the newspaper business? The following data gives the weekly amounts spent on groceries for sample of households.
A study was designed to compare variability of male and female diastolic blood pressure. The null hypothesis was that the population standard deviation were equal versus the alternative that they were not equal.
Which statistical analysis technique should be used? What is the null hypothesis? Can an analysis be performed? Why or why not?
Using an alpha of .05, what can you conclude about homogeneity of variance from the output? Word process your responses on the SPSS output pages.
Inverse probability based on normal distribution - The data set has a bell-shaped distribution. Between what two prices do 68% of the houses lie?
A company has developed the new battery, but the average lifetime is unknown. In order to estimate the average, a sample of 150 batteries is tested and an average lifetime of this sample is found to be 250 hours.
A survey of college students collected information on several variables: Distance from Home, Age, Major, Gender, and Class. The variable Major is
Which are likely to be independent events? For those you think are not, suggest reasons why.
A human society claims that less than 36% of US. households own a dog. In random sample of 397 U. S. households, 151 say they own a dog. At mean=0.03, is there enough evidence to support the society's claim?
Is there any reasonable explanation for the two months that have the highest frequencies?
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