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The mean +/- sd of in [calcium intake (mg)] among 25 females , 12 to 14 years of age, below the poverty level is 6.56 +/- 0.64. Similarly, the mean +/- 1 sd of in {calcium intake (mg)] among 40 females, 12-14 years og age, above the povery level is 6.80 +/ 0.75.
What is the appropriate procedure to test for a significant in different means between the 2 age groups. What is the p-value corresponding to your this answer and compute a 95% CI for the difference in means between the two groups.
Calculate the value of the chi-square statistic and test whether all regions are statistically the same at 5% and 1% level tests.
The supermarket is open 16 hours per day. What is the probability that the total number of customers who enter the supermarket in one day is greater than 10,000?
Compute the variance and standard deviation of the number that will arrive within two days.
Here are the DMS odor thresholds for 10 untrained students:
Use this sample information to develop a 99% confidence interval for the population proportion of women who wear flats to work.
A major problem resulting from the lack of randomization in a cohort study is: the possibility that a factor that led to the exposure, rather than the exposure itself, might have caused the disease.
A researcher studies the relationship between political attitudes and income. He/she finds that those with higher income are more conservative.
Find out sample correlation coefficients of (I) age with dry weight, and (2) age with log 10 dry weight. Interpret your results.
a. What is the probability of a type I error? b. Give the formula for the test statistic.
A senior accounting major at Midsouth State University has job offers from four CPA firms. To explore the offers further, she asked a sample of recent trainees how many months each worked for the firm before receiving a raise in salary.
For a normal distribution, the probability of randomly selecting a z-score greater than z = -2.00 is p = .0228.
One normal curve has mean 23 and standard deviation 1, a second normal curve has mean 5 and standard deviation 10. The curve that is more dispersed, or spread out, is
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