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The mean cholesterol levels of women age 45-59 in Ghana, Nigeria, and Seychelles is 5.1 mmol/l and the standard deviation is 1.0 mmol/l (Lawes, Hoorn, Law & Rodgers, 2004). Assume that cholesterol levels are normally distributed.
a.) State the random variable.
b.) Find the probability that a woman age 45-59 in Ghana has a cholesterol level above 6.2 mmol/l (considered a high level).
c.) Suppose doctors decide to test the woman's cholesterol level again and average the two values. Find the probability that this woman's mean cholesterol level for the two tests is above 6.2 mmol/l.
d.) Suppose doctors being very conservative decide to test the woman's cholesterol level a third time and average the three values. Find the probability that this woman's mean cholesterol level for the three tests is above 6.2 mmol/l.
e.) If the sample mean cholesterol level for this woman after three tests is above 6.2 mmol/l, what could you conclude?
Find the sample proportion of customers who believe ATM machines should offer postage stamps, and check the nonskewness criterion.
You are using the moving-average forecasting method based upon the last four observations. When making the forecast for the last period, the oldest of the four observations was 1,945 and the forecast was 2,083.
After the 90 days, you are going to invest your new-found money in a startup business. How much interest is earned on this investment?
a. Determine the least-squares regression equation for y 5 total group revenue as a function of x1 5 num- ber of retail vehicles sold and x2 5 number of dealers in the group. Interpret each of the partial regression coefficients. b. At the 0.02 level..
1) Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
what will be the balance in the account at the end of year 25, assuming you make no withdrawals from the account? (Note that after you stop making deposits
We have been informed that the stock has gone up 20%. What is the probability of a rise or fall in the GDP?
The data in an experiment have been examined using ANOVA, and a confidence interval has been constructed for the mean associated with each level for a factor. Which ANOVA technique (one-way, randomized block, or two-way) has not been used in this ..
the frequency distribution of 100 families given below the number of families corresponding to the expenditure groups
Average number of mosquitoes in pond is 80 per square meter with a standard deviation of 12. If 16 square meters are choses at random for a mosquiot count, find probabilty that the average of those counts is more than 83.0 mosquitoes per square me..
A sample of 50 provided a sample mean of 19.4. The population standard deviation is 2. a. Compute the value of the test statistic.
On May 23, 2013, Gallup reported that of the 1,005 people surveyed, 76% of U.S. workers believe that they will continue working past retirement age. The confidence level for this study was reported at 95% with a ±3% margin of error. Determine the ..
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