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Part 1) City officials want to estimate support for building a new city park. A random sample of 15 city residents will be selected. Suppose that 12 residents in the sample are in favor of building a new city park. Which of the following is true about the shape of the sampling distribution for samples of size 15?
-The sampling distribution will be approximately normal because a random sample was obtained.
-The sampling distribution will be approximately normal because 15 is less than 10% of all residents in the city.
-The sampling distribution will be approximately normal because the population is normally distributed.
-The shape of the sampling distribution cannot be determined from this information.
-The shape of the sampling distribution will be bimodal because there are two possible opinions. Part 2) Why is a random sample important for sampling distributions of proportions and means?
-A random sample ensures the shape of the sampling distribution will be approximately normal. ~Random sampling results in p?and x¯ being unbiased estimators.
-Random sampling results in overarc p and line segment x being unbiased estimators.
In the study, 246 of the 768 male firefighters correctly identified their weight as either normal, overweight or obese. The 95% confidence interval for the proportion of all male firefighters that correctly identify their weight is 28.7% to 35.3%
The distribution of 9 ounce bags of a particular bag of potato chips is approximately Normal with a mean of 9.12 ounces and a standard deviation of 0.15 ounces.
Draw a scatterplot of the data, with weight on the vertical axis and height on the horizontal axis. Draw a line onto the scatterplot that you believe describes the average pattern.
For a monatomic ideal gas of N particles, we found that the internal energy depends on the temperature only, E = (3/2)NkT, not on the volume.
Construct a two-way classification table for the survey results.
The report "Undergraduate Students and Credit Cards in 2004: An Analysis of Usage Rates and Trends" (Nellie Mae, May 2005) estimated that 21% of undergraduates with credit cards pay them off each month and that the average outstanding balance on u..
You roll a pair of dice ONE time. Let Event A be the dice show an odd sum.
question a property manager thinks that the average rent for one-bed room flat his city has gone up to aed 6000 per
1. How do solid contaminants in the hydraulic fluid cause wear of the moving parts of hydraulic components?
The probability is 90% that the sample percentage will be contained within what symmetrical limits of the population percentage?
In 1851 there were 25,466 nurses in Great Britain. Find the probability that a British nurse selected at random in 1851 would be 60 years or older. (My guess is The sum of the percent of nurses 60 years are older are added equaling 36% or 1967.76/2..
Suppose the true proportion of online diagnosers is 0.40. What is the probability that no action will be taken? What if the true proportion is 0.50?
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