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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.
Find the probability that a randomly selected employee earns less than $5.43.
Determine the probability that their SAT scores will differ by more than 50 points?
Suppose that the two lists are combined to produce a new list of 18 values. What is the average (mean) of this new list?
A sample of size 9 is drawn at random from a Normal distribution. The experiment has a null hypothesis of μ = 0 and an alternate hypothesis of μ > 0. The mean of the sample is 7 with an s of 8. Is there a difference at the 1% level?
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.
Barbara Flynn is in charge of maintaining hospital supplies at General Hospital. During the past year, the mean lead time demand for bandage BX-5 was 60 (and was normally distributed).
To find the necessary sample size to achieve the given level of accuracy of prediction.
Suppose four heads appeared face up on four tosses of a coin. what is the probability that a head will appear face up in the next toss of the coin?
Compute lower and upper quartiles of log10-balances? Determine 95% range of the balances in $s? Express in English what the two boundaries mean.
Create a 95% confidence interval for the population mean days absent for sickness based on this sample. Select the answer closest to your results.
Findout the 98% confidence interval for true mean. Findout a 98% confidence interval for the cigarette tax in all 50 states.
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
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