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A report states that 38% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 4% with 95% confidence?
a. 142
b. 283
c. 566
d. 1132
Statistics and Probability, Statistics
In a sample of 41 temperature readings taken from the freezer of a restaurant, the mean is 29.7 degrees and the standard deviation is 2.7 degrees. What would be the 80% confidence interval for the temperatures in the fre ...
1. A team of researchers have developed a new weight loss drug. They want to know if patients who use the new drug for two weeks lose any weight. The drug has some minor side effects including mild headaches and achiness ...
For the dataset 38, 39, 41, 42, 42, 43, 43, 45, 45, 47, 50, 50, 51, 51, 53, 54 Without doing any calculations, estimate which of the following numbers is closest to the mean.
15.1 15.3 15.2 14.6 14.8 15.2 15 15.2 15 15.4 15.7 14.8 15.4 15.5 14.9 14.9 14.9 15.3 15.5 15.4 15.1 14.7 15.1 14.6 14.7 15.2 15.4 15.4 14.5 15.5 15.1 14.8 14.9 14.6 14.6 15.4 15 15.3 15.5 14.9 15.2 15.2 15 15.1 14.7 14. ...
The length of time a person takes to decide which shoes to purchase is normally distributed with a mean of 8.21 minutes and a standard deviation of 1.90. Find the probability that a randomly selected individual will take ...
Rand Corporation has a 0.0 probability of a return of 0.6, a 0.3 probability of a rate of return of 0.05, and the remaining probability of a 0.92 rate of return. What is the expected rate of return of Rand Corporation?
In this question are you just using the empirical rule? You know that your population is normally distributed with a mean of 100 and a standard deviation of 15. Using the empirical rule as a rough approximation, what is ...
Complete parts (a) and (b) using the probability distribution below. The number of overtime hours worked in one week per employee Overtime hours 0 1 2 3 4 5 6 Probability 0.016 0.063 0.178 0.283 0.220 0.173 0.067 Find t ...
A bank contains 2 Quarters, 5 dimes, and 3 Nickels. You draw two coins at random. Determine the probability distribution for the sum of the two coins drawn
1. Three experiments investigating the relation between need for cognitive closure and persuasion were performed. Part of the study involved administering a "need for closure scale" to a group of students enrolled in an ...
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