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Eye doctor wants to estimate the HDL cholesterol of all 20 to 29 year old females.
A. How many subjects are needed to estimate the HDL cholesterol within four points with 99% confidence assuming the average of 18.2
B. Suppose the doctor would be content with 90% confidence.
C. How does this decrease the confidence affect the sample size required
Compute mean, median, mode, first and third quartile and compute the variance, standard deviation, range, interquartile range, coefficient of variation, standard error of the mean and Z scores.
an advertising company has 12 men and 8 women. suppose the company needs to select a team of 5 members to work on a
Statistics is about more than calculations. It is about turning data into information and using this information to understand the population.
q1. in a city in italy 30 of the families have a mastercard 20 have an american express card and 25 have a visa card.
Find a 95% confidence interval for the true variance in height for natural rice plants.- Find a 95% confidence interval for the true variance in height for genetically engineered rice plants.
In a two-way ANOVA, there are 4 levels for factor A, 5 levels for factor B, and 3 observations for each combination of factor A and factor B levels. The number of treatments in this experiment equals:
Compute the Kappa statistic and its standard error reading reproducibility of the diagnosis of dyspnea in this clinic.
Fancorp (a consulting firm) claims that "less than half of franchises are owned by husband-wife team." A simple random sample of 37 franchise owners shows that 12 are owned by husband-wife team. Can you confirm Fancorp's claim at α = 0.05? (Use ..
An achievement test is said to be reliable if a student who takes the test several times will consistently get high (or low) scores. One way of checking the reliability of a test is to divide it into two parts, usually the even-numbered problems a..
Construct the sampling distribution of sample means for samples of size 2 selected from this set and construct the sampling distributions of sample ranges for samples of size 2
Use these data to test the hypothesis of no difference in the population mean daily production of biodiesel at these five plants. Use a = 0.05.
Find the mean number of children with type A blood, and mark the location of the mean on your probability histogram.
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