Suppose a sample of eight 35- to 39-year-old nonpregnant, premenopausal OC users who work in a company and have a mean systolic blood pressure (SBP) of 132.86 mm Hg and sample standard deviation of 15.34 mm Hg are identified. A sample of 21 nonpregnant, premenopausal, non-OC users in the same age group are similarly identified who have mean SBP of 127.44 mm Hg and sample standard deviation of 18.23 mm Hg. Assuming that the underlying variances in the two groups are the same, is there a significant difference in the blood pressures between the two groups? Step 1: State the hypotheses Step 2: State the level of significance Step 3: Compute the test statistic -Include computation of the pooled variance and round off to two decimal places. -Compute for t using the formula mentioned in the video and round off to two decimal places. -Use the link provided in the previous sessions to determine the following: a) critical values b) p-value Step 4: Make a decision -Reject or do not reject Ho. -State the conclusion.
Continuous Probability Distributions
Probability distributions are of two types, which are continuous probability distributions and discrete probability distributions. A continuous probability distribution contains an infinite number of values. For example, if time is infinite: you could count from 0 to a trillion seconds, billion seconds, so on indefinitely. A discrete probability distribution consists of only a countable set of possible values.
Normal Distribution
Suppose we had to design a bathroom weighing scale, how would we decide what should be the range of the weighing machine? Would we take the highest recorded human weight in history and use that as the upper limit for our weighing scale? This may not be a great idea as the sensitivity of the scale would get reduced if the range is too large. At the same time, if we keep the upper limit too low, it may not be usable for a large percentage of the population!
Suppose a sample of eight 35- to 39-year-old nonpregnant, premenopausal OC users who work in a company and have a
Step 1: State the hypotheses
Step 2: State the level of significance
Step 3: Compute the test statistic
-Include computation of the pooled variance and round off to two decimal places.
-Compute for t using the formula mentioned in the video and round off to two decimal places.
-Use the link provided in the previous sessions to determine the following:
a) critical values
b) p-value
Step 4: Make a decision
-Reject or do not reject Ho.
-State the conclusion.
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