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Choose a person aged 19 to 25 years at random and ask, "how many times have you worked out in the past?" Call the response X for short. Based on a large sample survey, here is a probability model for the answer you will get:
Days 0 1 2 3 4 5 6 7Probability 0.68 0.05 0.07 0.08 0.05 0.04 0.01 0.02
a) Verify that this is a legitimate discrete probability model
b) Describe the event X < 7 in words. What is P(X < 7)?
c) Express the event " worked out at least once" in trems of X. What is the probability of this event?
Determine the probability that sample mean is between 7.5 and 8 minutes?
Consider the following two columns that describe different types of data: A. Nominal 1. Qualitative B. Discrete 2. Quantitative C. Ordinal D. Continuous. The correctly paired groupings of the two columns is:
Create a set of n observations from the binomial distribution with 1 trial and the event probability of 0.007, where n is your answer.
If the sum of the squared deviations about the regression line is SSE = 40.0, what is the coefficient of determination?
Bougainvilleas, mean growth rate was 2.23 inches/week and sample standard deviation was 0.77 inches/week. Determine a 90% confidence interval for mean growth rate of all Bougainvilleas.
Suppose that the National Labor Relations Board (NLRB) wishes to estimate the average hourly wage rate for a certain classification of skilled workers. It wishes to be 95% certain to get an estimate of sample mean within 0.05 of the truth.
Use this information to construct a probability table, and then calculate each of the following probabilities:
Job Interviews: Based on information from MRINetwork, some job applicants are required to have several interviews before a decision is made. The number of required interviews and the corresponding probabilities are: 1 (0.09); 2 (0-31); (0.37); 4 (..
The total population of car passengers involved in traffic accidents are classified into six categories: two factors (one with 2 levels and one with 3 levels) crossed.
What control limits should be applied to his sample?
If writing scores for population have standard deviation of s = 20, does sample give sufficient evidence to conclude that new composition course has significant effect? Suppose a two tailed test with a = 0.05.
A rental agent claims that the mean monthly rent, mu, for apartments on the east side of town is less than $725. A random sample of 13 monthly rents for apartments on the east side has a mean of $724
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