
"A psychologist would like to examine the relative effectiveness of three therapy techniques for treating mild phobias. A sample of N = 15 individuals who display a moderate fear of spiders is obtained. These individuals are randomly assigned (n = 5) to each of the three therapies. The...

can you help with the attached problem,, Thank you so much

An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 120 lb and 181 lbs. The new population of pilots has normally distributed weights with a mean of 128 lb and a standard deviation of 31.7 lbs. a) If a pilot is randomly selected,...

in words explain what measured by each of the following : A) SS, B)variance, C)standard divination

250g yoyo is swung on the end of a 50cm string at a constant speed of 2 m/s. the centripetal force acting on the yoyo is

find the probability of obtaining 2 nonconforming units on the first sample of 2 and 1 nonconforming unit on the second sample of 2. What is the probability of 0 nonconforming units on the first sample and 2 nonconforming units on the second? The first gasket selected is returned to the lot...

1. can sum of square (SS) ever have a value less than zero? explain your answer 2. what does it mean for a sample to have a standard deviation of s=5? describe the scores in a such a sample. ( describe where the scores are located relative to the sample mean.) 3. for the data in the...

1. for the following population of N=10 scores 14,6,8,3,9,12,1,6 a) sketch a histogram showing the population distribution b) locate value of the population mean in your sketch and make an estimate of the standard deviation c) compute sum of square (SS), variance, and standard deviation...

CHOICE UNDER UNCERTAINTY In a crime ridden neighborhood, a thief is trying to decide whether or not to rob a local bank today. From experience, the thief knows that with probability 0.5 a local bank will have an antithief protection plan in which case he will get caught. If he gets...

In a batch of 8,000 clock radios 9% are defective. A sample of 6 clock radios is randomly selected without replacement from the 8,000 and tested. The entire batch will be rejected if at least one of those tested is defective. What is the probability that the entire batch will be rejected?
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 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
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