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A large disaster cleaning company estimates that 30% of the jobs it bids on are finished within the bid time. Looking at a random sample of 8 jobs that is has contracted:
Calculate the mean number of jobs completed within the bid time.
In total, of 1000 applications they got from men, they hired 625, or 62.5%. Based on numbers presented, what do you believe of the discrimination claim?
Assuming that the goal of 4% undersized tomatoes is reached, what is the probability of getting no more than 1 undersized tomato in a randomly selected sample of 20 tomatoes?
At the 0.01 level of significance, test the claim that the mean is less than 342 km. Should the storage yard be moved? Give your reasons.
Assume rivets are defective independently of one another, each with the same probability. If 24% of all seams need reworking, determine the probability that rivet is defective?
Finding the probability value for the given data using normal approximation
What percentage of the averages or medians of the sample will be greater than 140 seconds?
1 a random sample of size 100 was taken from a population. a 94 confidence interval to estimate the mean of the
a coin is tossed three times. find the probability that the coin lands on tails then heads then
A student scores 91 on the midterm exam for physics. Assume the class scores are normally distributed, with a mean of 65 and standard deviation of 15. Into what percentile does this student fall?
Construct a 90% prediction interval for sales when the total sq footage is 4.2 billion. The equation of the regression line is yhat=499.967x - 1595.147.
Find the probability that he will answer at least 3 questions correctly.
question the following table gives a two-way classification based on gender and employment status of the civilian
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