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Suppose a stockbroker has recommended 8 stocks to a client. The client chooses to invest in 4 of these stocks at random. If five of the recommended stocks will increase in value over the next year, determine the probability that at least half of the stocks selected by the client will increase in value over the next year. Explain.
A random sample of 100 adult workers, 60 men and 40 women, is selected in a large Midwestern city. Of the group, 42 men and 17 women are union members.
At the start of the study the mean of the group was 24 and the end of the study the mean of the group was 30. The standard deviation of the difference scores was 12.0 and we had 16 subjects.
The period of the orbit is 2.3 hours. The radius of the planet is 4.34 × 106 m. What would be the true weight of the satellite if it were at rest on the planet's surface?
The process of using sample statistics to draw conclusion about the true population parameters is called:
Find the critical t alpha/2 assuming the population is normally distributed, the confidence level is 95%, n=101 and sigma is unknown.
A researcher studies the relationship between political attitudes and income. He/she finds that those with higher income are more conservative.
What is the relationship between confidence intervals and hypothesis testing? How are they the same? How are they different?
Machine X test unit cost $3000 with beta=3 and theta=500, Machine Y test unit cost $2000 with beta=3 and theta=400. If the machines oil fixtures has life of 20 hrs, which machine goes to market first?
If the basket ball player is a 74% free throw shooter, then, on average, how many free throws will he or she make in a game with eight free throw attempts?
Upon reviewing the accounting records from the restaurant, you discover that it grosses roughly $3000 per day on 6 out of 10 days. Determine the estimated probability that the restaurant will gross over $3000:
The average age for all medicare patients in the USA is 75. A sample from a clinic shows that the average age of the clnic medicare patients is 78.
Find the percentage of such males that weigh between 190 and 210 lb. (Note: Make sure you choose the flag value closest to 190 and 210.) Give the proportion as a decimal rounded to thousandths.
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