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A psychology researcher who does work in creativity wants to determine whether her sample of 50-year-old adults (N = 150) differs statistically from the population of 50-year-olds in intelligence. For her sample, she calculates the following: Mean = 109, SD = 10. (Hint: By definition, the mean IQ of this population is 100 and the population standard deviation is 15. Another hint: Use the z-test here!)
What is the likelihood that the sample mean is between $19 and $21? Assume the population of fares is normally distributed. (Round z value to 2 decimal places and final answer to 4 decimal places.)
Assume the data have bell shaped distribution with a mean of 30 and a standard deviation of 5. Employ the empirical rule to determine the percentage of data within each of the following ranges: 20 to 40, 15 to 45, and 25 to 35.
Fire insurance. Insurance companies collect annual payments from homeowners in exchange for paying to rebuild houses that burn down.
In a non instanteneous receipt model, daily demand is 55 units and daily production is 120 units, Co=$70 and Cc=$4 per unit per year. What is the maximum inventory level?
1. Rabbits like to eat the cucumbers in Mimi's garden. There are 10 cucumbers in her garden which will be ready to harvest in about 10 days. Based on her experience, the probability of a cucumber being eaten by the rabbits before harvest is 0.30.
Your telephone operators receive many different types of calls. Requests for information account for 75% of all calls, while 15% of calls result in an actual.
At the end of the year, Konstantin plans to graduate and find a job. He is currently evaluating several job prospects, and his choice has come down.
Assume that on a true-false test, students will answer correctly any question on a subject they know. Assume students guess at answers they do not know.
The makers of a soft drink want to identify the average age of its consumers. A sample of 16 consumers is taken. The average age in the sample was 22.5 years with a standard deviation of 5 years.
an elementary school is offering 3 language classes one in spanish one in french and one in german. these classes are
Find the upper boundary of the 95% confidence interval for the average unload time. Round the answer to two decimal places.
Translate the following statements into symbolic form using capital letters to represent affirmative English statements.- If Maria Cantwell promotes alternative energy, then if Patty Murray supports wilderness areas, then Dianne Feinstein's advocati..
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