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Heights of women have a bell-shaped distribution with a mean of 156 cm and a standard deviation of 8cm using the chevyshev's theoriem what do we know about the percentage of women with heights that are within 2 standard deviations of the mean? what are the minimum and maximum heights that are within 2 standard deviations of the mean
Determine the standard error of estimate. Suppose a large sample is selected (instead of just five). About 68 percent of the predictions would be between what two values?
In a poll of 1,004 adults, 93% indicated that restaurants and bars should refuse service to patrons who have had too much to drink. Construct the 90% confidence interval for the proportion of all adults who feel the identical way.
Determine the estimated population mean?
Of the 38 numbers on a roulette wheel, 18 are red, 18 are black and 2 are green. If the wheel is balanced, the probability of the wheel landing on red is 0.474.
No estimate of the population proportion is available. How large a sample is required?
In an online survey of 4001 respondents, 8% were classified as productivity enhancers who are comfortable with technology and use the internet for its practical value. Suppose you select a sample of 400 students at your school, and the population ..
Why is a dummy variable uncorrelated with the least squares residual? What does this imply?
Determine whether and how each of the following factors would shift the demand curve for chiropractic visits:
Compute variance, standard deviation, range, interquartile range, CV, and minimum and maximum Z scores. Are there any outliers? Explain.
you plan to conduct a survey to find what proportion of the workforce has two or more jobs. you decide on the 99
you have made calculations to test scores from 50 students are from a normal distribution. you calculate the mean score
According to hypothetical information, 18% of all Americans have hazel colored eyes. A SRS of 25,000 Americans are surveyed and asked about their eye color
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