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A study showed that 32% of all firms in County A are owned by women. You are phoning local businesses, assuming that the percentage is true in your area. You call 3 firms. What is the probability that all 3 are owned by women?
In the publication Employment and Earnings, information on the ages of people in the civilian labor force was published. Seventy-five people in the civilian labor force are randomly selected.
If the same sample results had been obtained from a random sample of 16 students, could the students' claim be accepted at a lower level of significance?
Is this sample sufficient to conclude that the eye spots have a significant influence on the birds behavior? Use a two tail test with alpha =.05. Compute the estimated Cohen's d to measure the size of the treatment.
What is the probability of selecting someone at random from this population who has a cholesterol value less than 180? What is the mean and the standard deviation (error) of?
Using the results, describe the effect of an outlier or extreme value on the confidence interval.
A professor of math refutes the claim that the average student spends 3 hours studying for the midterm exam. Which hypothesis is used to test the claim?
A consumer agency has retained an independet testing firm to examine a television manufacturer's claim that its 25-inch console lmodel consumes just 110 watts of electricity.
What is the 95% confidence interval for the true average number of hands per hour during peak hours?
If there is a significant difference between proportions of females and males who plan to vote for the incumbent president. what is the p value of the test.
an investor estimates that there is a 75 chance that a particular mutual funds price will increase to 100 per share
Chicken Delight claims that 90% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 100 orders revealed that 82 were delivered within the promised time.
You are dealt 2 cards successively without replacement from a shuffled deck of 52 cards. Find the probability that the first card is a king and the second card is a queen.
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