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The Smoky Bear Trucking Company claims the average weight of a fully loaded moving van is 12,000 lb. The highway patrol decides to check this claim. A random sample of 30 Smoky Bear moving vans shows that the average weight is 12,100 lbs, with a standard deviation of 800 lbs. Construct a hypothesis test to determine whether the average weight of a Smoky Bear moving van is more that 12,000 lb. Us a 5% level of significance.
a. State the null and alternate hypothesis.b. Identify the sampling distribution to be used (Normal, Student t, or binomial)c. What is the critical value?d. Decide whether to reject or not reject the null hypothesis at the given significance level.e. Explain your conclusion is simple non-technical terms.
Research on new juvenile delinquents revealed that 38% of them committed another crime. What is the probability that 40 or fewer of the delinquents will commit another crime?
Use the method of least squares to model the relationship between x and y.
What is the event corresponding to the above system failing during one period of operation and what is the event corresponding to the above system functioning properly during one period of operation?
If 700 stolen cars are randomly selected, what is the mean and standard deviation of the number of cars recovered after being stolen?
The frequency distribution below was constructed from data collected from a group of 25 students. Construct a relative frequency distribution.
What is the 95% confidence interval for the mean number of microwaves sold at a retail store in the chain last week?
The average weight of adult men is 172 pounds with a standard deviation of 29 pounds. 30 men were asked their weight and the mean was calculated to be 181, test the hypothesis that the mean is not 172 pounds using alpha = .05.
Under what circumatances do you use a one-sided confidence interval instead of a 2 sided confidence interval?
Make a histogram for the r probability distribution.
What is the questionnaire score that separates customers who are considered risk averse from those who are not? Carry your intermediate computations.
Find out the coefficient of determination, r 2 , and interpret its meaning.
What is the number of neurons n such that the probability of more than n neurons have higher firing rates for Condition 1is 0.99?
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