The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services...
The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services is 4639 miles, with a standard deviation of 437 miles.
If he is correct, what is the probability that the mean of a sample of 32 cars would be less than 4424 miles? Round your answer to four decimal places.
Homework Answers
=P[Z<-2.78]
=0.0027...................by using Z table or Excel command =NORMSDIST(-2.78)
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The head of maintenance at XYZ Rent-A-Car believes that the mean
number of miles between services...
The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services...
The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services is 3290 miles, with a standard deviation of 384 miles If he is correct, what is the probability that the mean of a sample of 33 cars would be less than 3160 miles? Round your answer to four decimal places.
The operation manager at a tire manufacturing company believes that the mean mileage of a tire...
The operation manager at a tire manufacturing company believes that the mean mileage of a tire is 37,014 miles, with a standard deviation of of4617 miles. What is the probability that the sample mean would be less than 36,435 miles in a sample of 56 tires if the manager is correct? Round your answer to four decimal places.
the operation manager at the tire manufacturing company believes that the mean mileage of a tire...
the operation manager at the tire manufacturing company believes that the mean mileage of a tire is 47,225 miles, with a standard deviation of 3178. what is the probability that the sample mean would be less than 47,050 miles in a sample of 208 tires if the manager is correct? ( round your answer 4 decimal places and show work)
The quality control manager at a computer manufacturing company believes that the mean life of a...
The quality control manager at a computer manufacturing company believes that the mean life of a computer is 120 months, with a standard deviation of 10 months. If he is correct, what is the probability that the mean of a sample of 90 computers would be less than 117.13 months? Round your answer to four decimal places.
The quality control manager at a computer manufacturing company believes that the mean life of a...
The quality control manager at a computer manufacturing company believes that the mean life of a computer is 83 months, with a standard deviation of 99 months. If he is correct, what is the probability that the mean of a sample of 78 computers would be less than 82.06 months? Round your answer to four decimal places.
The quality control manager at a computer manufacturing company believes that the mean life of a...
The quality control manager at a computer manufacturing company believes that the mean life of a computer is 117 months with a standard deviation of eight months if he is correct what is the probability that the mean of a sample of 52 computers would be less than 115. 46 months round your answer to four decimal places
a) Suppose that miles driven anually by cars in America are normally distributed with mean μ...
a) Suppose that miles driven anually by cars in America are normally distributed with mean μ = 12, 394 miles and standard deviation σ = 1190 miles. (a)If one car is chosen at random, what is the probability it has driven less than 12,000 miles last year? (b) If a sample of 25 cars is taken, what is the probability that the mean of the sample is less than 12,000 miles? c)For a standard normal distribution, find P(1.22 < z...
The operation manager at a tire manufacturing company believes that the mean mileage of a tire...
The operation manager at a tire manufacturing company believes that the mean mileage of a tire is 49,36049,360 miles, with a variance of 6,568,9696,568,969. What is the probability that the sample mean would differ from the population mean by less than 231231 miles in a sample of 247247 tires if the manager is correct? Round your answer to four decimal places. CAN YOU PLEASE SHOW ME HOW TO DO THIS IN CALCULATOR TI-83 PLUS SPECFICALLY
Suppose that the miles-per-gallon (mpg) rating of passenger cars is normally distributed with a mean and...
Suppose that the miles-per-gallon (mpg) rating of passenger cars is normally distributed with a mean and a standard deviation of 39.3 and 2.9 mpg, respectively. [You may find it useful to reference the z table.] a. What is the probability that a randomly selected passenger car gets more than 40 mpg? (Round “z” value to 2 decimal places, and final answer to 4 decimal places.) Probability:________________ b. What is the probability that the average mpg of four randomly selected passenger...
The manufacturer of a new car claims that miles per gallon for the gas consumption is...
The manufacturer of a new car claims that miles per gallon for the gas consumption is normally distributed with a mean of 25.9 mpg and a standard deviation of 3.1 mpg. a.) If one car is tested, what is the probability that the mean mpg is less than 24 mpg? b.) If 30 cars are tested, what is the probability that the mean mpg is less than 24 mpg? c.) If one car is tested, what is the probability that...
The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services is 3290 miles, with a standard deviation of 384 miles If he is correct, what is the probability that the mean of a sample of 33 cars would be less than 3160 miles? Round your answer to four decimal places.
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