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Question: 1) Suppose that the frequency distribution of daily high temperatures in a city are normally distributed with a mean of 60 degrees. Suppose that roughly one day every two years has a high temperature of 90-degrees or warmer. If this is the case, what is the approximate standard deviation of daily high temperatures? 2) Suppose that the frequency distribution of daily high temperatures in a city are normally distributed with a mean of 60 degrees. If approximately 9 days in a year have a daily temperature of 100 degrees and above, then what is the standard deviation of daily high temperatures? These questions are very similar, and I wonder how to find approximate standard deviation without a data set? The only information from the question is the mean and the highest temperature. Are the days mentioned in the question matters to find the answer? By how?
problem 1a researcher is interested in evaluating whether there is a relationship between number of packs of cigarettes
Use the normal distribution to approximate the following probability: According to the most recent Davenport student profile, 47% of students have children under 17 living at home with them. Find the probability that a random sample of 800 students w..
12) The time it takes to process phone orders in a small florist/gift shop is normallydistributed with a mean of 6 minutes and a standard deviation of 1.24 minutes.a. What cutoff value would separate the 2.5% of orders that take the most time ..
Examine statistical data consisting of records of car accidents on Victorian roads and freeways in 2012
Each condominium is classified as Gulf View if it is located directly on the Gulf of Mexico or No Gulf View if it is located on the bay or a golf course, near but not on the Gulf.
The population proportion of Americans with diabetes is 9 percent (uc0u960 = 0.09). In repeated random samples of n = 800 Americans, 90% of sample proportions of people with diabetes would fall within______ from
A person estimates that his commute to work will most likely take 50 minutes. However, it could talk as long as 1 hour and 35 minutes worst case, or as little as 35 minutes best case. What is the approximate standard deviation based on the ab..
question 1 let x yz denote i.i.d. random variables with exp distribution for lambda gt 0. find px lt y zquestion 2
A more general exponential reliability model may be defined by R(t)=a^(-bt) where a>1, b>0 and a and b are parameters to be determined. Find the hazard rate function, and show how this model is equivalent to R(t)=e^-(lambda*t).
Regression analysis is one of the most widely used statistical techniques in the social sciences. So, what is it? In your answer, apply some of the techniques we have learned to regression - e.g., point estimates, interval estimates, test statistics,..
Nonlinear regression. The following data gives the distance from the sun (in millions of miles) and the length of year (in earth years) for the traditional 9 planets in the solar systems (including pluto, which is technically a dwarf-planet as..
Variable regression model - matrix of independent variables- multiple regression and, in particular.
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