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Use the tables for finding area under a normal curve!
Question 9 3 pts Household incomes...
Use tables to find the area under a Normal Curve! Question 3 3 pts For a...
Use tables to find the area
under a Normal Curve!
Question 3 3 pts For a standard normal distribution, find the value of zo that satisfies P(z> Zo)- .1038. 1.26 0.26 0.26 0.27
To FOUR DECIMAL PLACES: Determine the area under the standard normal curve that lies to the...
To FOUR DECIMAL PLACES: Determine the area under the standard normal curve that lies to the left of Z = –1.31 to the right of Z = –2.47 between Z = –2.47 and Z = –1.31 between Z = 1.31 and Z = 2.47 Find the z-scores that separate the middle 84% of the standard normal distribution from the area in the tails. Find z0.18 a. Find the Z-score corresponding to the 72nd percentile. In other words, find the Z-score...
Use the Normal Tables to find the area under the standard normal curve that fits each...
Use the Normal Tables to find the area under the standard normal curve that fits each description. P (z < 2.16) P (z > 1.15) P (z ≤-1.92) P (1.30 <z< 2.65) 60% of all thingamabob and doohickeys. Suppose we randomly select 20 thingamabobs. What is the probability that exactly 12 are doohickeys? As before 60% of all thingamabobs are doohickeys. Suppose we randomly select 20 thingamabobs. The mean number of doohickeys would be 12 with a standard deviation of...
1. About % of the area under the curve of the standard normal distribution is outside...
1. About % of the area under the curve of the standard normal distribution is outside the interval z=[−0.91,0.91]z=[-0.91,0.91] (or beyond 0.91 standard deviations of the mean). 2. Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find P11, the 11-percentile. Round to 3 decimal places. This is the temperature reading separating the bottom 11% from...
4. Interpreting area under the standard normal curve Suppose Dunlop Tire manufactures tires having the property...
4. Interpreting area under the standard normal curve Suppose Dunlop Tire manufactures tires having the property that the mileage the tire lasts approximately follows a normal distribution with mean u=70,000 miles and a standard deviation o=4400 miles. a. What percent of the tires will last at least 75,000? b. Suppose Dunlop gives a warranty for tires to last 60,000 miles. What percent of the tires will last 60,000miles or less? c. What is the probability that a randomly selected Dunlop...
In Exercises 1-8, find the indicated area under the standard normal curve. If convenient, use technology...
In Exercises 1-8, find the indicated area under the standard normal curve. If convenient, use technology to find the area 1. To the right of z-3.2:2 2. To the left of z--2.825 3. To the right ofz-0.015 4. Between 1.64 and z-0 5. Between 6. Between z=0.05 and z=1 .71 7. Between z=-2.68 and z=2.68 8. To the left of z--1.5 and to the right of z-1.5 1.55 and z-1 In Exercises 9-15, find the indicated probability using the standard...
a) Sketch the area under the standard normal curve over the indicated interval and find the...
a) Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area to the right of z = 1.51 is ____ b) The Customer Service Center in a large New York department store has determined that the amount of time spent with a customer about a complaint is normally distributed, with a mean of 9.5 minutes and a standard deviation of 2.1 minutes. What is...
State whether the following statement is True or False. The area under the standard normal distribution...
State whether the following statement is True or False. The area under the standard normal distribution curve from negative infinity to infinity is 1. Use the normalcdf feature on the calculator to find the specified area under standard normal distribution curve. Round your answers to four de the nearest ten-thousandth). To the right of z = 1.13 Question 3 (6 points) On the daily run of an express bus, the average number of passengers is 48. The standard deviation is...
Use tables to find the area
under a Normal Curve!
Question 3 3 pts For a standard normal distribution, find the value of zo that satisfies P(z> Zo)- .1038. 1.26 0.26 0.26 0.27
4. Interpreting area under the standard normal curve Suppose Dunlop Tire manufactures tires having the property that the mileage the tire lasts approximately follows a normal distribution with mean u=70,000 miles and a standard deviation o=4400 miles. a. What percent of the tires will last at least 75,000? b. Suppose Dunlop gives a warranty for tires to last 60,000 miles. What percent of the tires will last 60,000miles or less? c. What is the probability that a randomly selected Dunlop...
In Exercises 1-8, find the indicated area under the standard normal curve. If convenient, use technology to find the area 1. To the right of z-3.2:2 2. To the left of z--2.825 3. To the right ofz-0.015 4. Between 1.64 and z-0 5. Between 6. Between z=0.05 and z=1 .71 7. Between z=-2.68 and z=2.68 8. To the left of z--1.5 and to the right of z-1.5 1.55 and z-1 In Exercises 9-15, find the indicated probability using the standard...
State whether the following statement is True or False. The area under the standard normal distribution curve from negative infinity to infinity is 1. Use the normalcdf feature on the calculator to find the specified area under standard normal distribution curve. Round your answers to four de the nearest ten-thousandth). To the right of z = 1.13 Question 3 (6 points) On the daily run of an express bus, the average number of passengers is 48. The standard deviation is...
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