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Calculate Z value for given data. A recent article in the Myrtle Beach Sun Times reported that the mean labor cost to repair a colour television is $90 with a standard deviation of $22. Monte's TV Sales and Service completed repairs on two sets this morning. The labor cost for the first was $75 and it was $100 for the second. Calculate z values for each and comment on your findings.
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
The mean return for the random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Test the null hypothesis: H0: mu = 15% at α = 0.05.
Assume that the following four examines were tested as part of a large group that had a normally curved distribution.
Assuming the nurses surveyed were a random sample from the population of all nurses in the United States, we can use these data to test the null hypothesis H0 that there is no association between the row and column variables in this two-way table...
A statistics instructor wants to know which route will get her to school the fastest. Each day from October 2 to November 15, when she gets to the turn point she checks the odometer on her car
Findout the percentage of trainees earns less than $900 a month utilizing normal distribution.What percentage of trainees earns less than $900 a month?
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
If code is 4 random letters, and letters can be utilized multiple times, how many different possible codes are there?
Probability using discrete distribution.The probability distribution for the random variable x follows.
Note down a research that requires a decision making with probabilities.
Construct an appropriate control chart and comment on the process.
An old saying in golf is "you drive for show and you putt for dough." The point is that good putting is more important than long driving for shooting low scores and hence winning money.
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