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Business and Management
Snail farming, or heliciculture, has become more popular and lucrative in many parts of the world. In April 2013, John Morton, head of U.S. Immigration and Customs Enforcement, resigned with plans to open a snail farm.15 The Helix pomatia, or escargot snail, grows to full size in 2 to 3 years and weighs 15 to 25 grams. A random sample of snails of this type was obtained from a farm near the town of Targovishte, Bulgaria. Each snail was carefully weighed (in ounces). Assume σ = 2.4 grams.
a. Find a 99% confidence interval for the true mean weight of these snails.
b. Using your answer in part (a), is there is any evidence to suggest that the population mean weight is more than 20 grams?
c. How large a sample size is necessary for the bound on the error of estimation to be 0.5 gram?
it is important that face masks used by firefighter be able to withstand high temperatures because firefighters
What proportion of 1040R tax forms will be completed in more than 114 minutes? Round your answer to at least four decimal places.
the average selling price of blackberry smart phones purchased by a random sample of 35 customers in 2010 was 311.
a sports league is making up their season schedule. the league has 12 teams with eight teams from la and the rest from
Securities Exchange Commission (SEC) was $22,500, with a standard deviation of $7,500. The SEC overseers want to draw a sample of 100 accounts to help assess the impact of the fund's freeze on the account holders.
Suppose that this estimate was based on a random sample of 600 households (i.e., n = 600 and p = .64). Construct a 95% confidence interval for π, the true proportion of all households that use coupons.
Can you determine a in equation (7) by measuring the length of the spring with no load? With one measurement? Ten measurements? Explain briefly.
With 96 large hurricanes observed over the 16 periods, what are the expected value(s) for each cell? b) What kind of chi-square test would be appropriate?
Calculate Mean of a Probability Distribution
Determine whether the following are demonstrative definitions, enumerative definitions.- "Mountain" means something such as Everest, Rainier, Whitney, or McKinley.
find the t-critical value for given confidence level and the sample size.a. n10 90b. n25 98c. n28 99d. n15
A nationwide test taken by high school sophomores and juniors has three sections, each scored on a scale of 20 to 80. In a recent year, the national mean score for the writing section was 47.2 , with a standard deviation of 10.2.
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