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Working with the Chi-Square Procedure.

Suppose that you want to decide whether the distribution of primary heating fuel of occupied housing units built after 1974 differs from that of all occupied housing units. To help you decide, you take a random sample of n housing units built after 1974 and obtain a frequency distribution of their primary heating fuel. The primary heating fuel for all occupied housing units is distributed as follows. Primary heating fuel Percentage Natural gas 51.3 Fuel oil, kerosene 10.9 Electricity 29.4 Liquid propane gas 5.4 Wood 2.2 Other 0.8 a. Identify the population and variable under consideration. b. For each of the following sample sizes ... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

5933

OTA ID:

101733

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Calculations of mean, median, and mode.

Calculate mean, median, and mode. Graph the data and locate the averages. See attached file for full problem description.

Subject:

Statistics

Topic:

All Topics

Posting ID:

6026

OTA ID:

103234

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Using the probability density function to find the cumulative distribution function of an exponentially distributed random variable.

You are told that the continuous random variable X is exponentially distributed with parameter a (a > 0). A standard result then says that the probability density function of X is (see attachment) f(x) = aexp(-ax) for x > 0. Use this to prove that the corresponding cumulative distribution function F(x) (sometimes referred to as the distribtuion function) is F(x) = 1 - exp(-ax). Hence find the probability that X is greater than 5, if a=0.5

Subject:

Statistics

Topic:

All Topics

Posting ID:

6033

OTA ID:

103563

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Probability

26. MCQ: A family center conducted research on carbohydrate consumption in the high school and found that 30% of all high school sophomores ate at least four candy bars a day. If 20 high school sophomores are selected at random, what is the probability that exactly 6 of these eat at least 4 candy bars a day? a) 0.300 b) 0.500 c) 0.192 d) 0.104 e) NOT

Subject:

Statistics

Topic:

All Topics

Posting ID:

6041

OTA ID:

102799

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Probability: NBA (National Basketball Association) application

Probability questions on NBA. ONLY DO PROBLEM 1 and 2 from the four questions in the document. Problem 1 � Consider the NBA Data Set Given: A. What proportion of these players are less than 74 inches tall? B. Suppose a random sample of 25 of these players is taken and x is the number of players in the sample who are less than 74 inches tall. Find P(x=0), P(x=1), P(x=2), P(x=3), P(x=4), P(x=5). C. Note that x in part b has a binomial distribution with lambda=np. Use the Poisson probabilities table to approximate P(x=0), P(x=1), P(x=2), P(x=3), P(x=4), P(x=5). D. Are the probability distributions of parts b and c consistent or is the Poisson approximation inaccurate. Explain. Prob... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

6047

OTA ID:

103234

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