1) Bringing all of section 6.2 together...
A company knows that replacement times for the DVD players it
produces are Normally distributed with a mean of 4.5 years and a
standard deviation of 1.1 years.
Find the proportion of a randomly selected DVD players that will
have a replacement time less than 2 years?
P(X < 2 years) = _________________ (Enter your
answer accurate to 4 decimal places.)
If the company wants to provide a warranty so that only 3.1% of the
DVD players will be replaced before the warranty expires, what is
the time length of the warranty?
warranty = ___________years (Enter your answer as a number accurate
to 1 decimal place.)
2) For a standard normal distribution, find:
P(z > c) = 0.0286
Find c. In other words, find the z-score that has 0.0286 to its
right.
_____________
3)Assume that the readings at freezing on a batch of
thermometers are Normally distributed with mean 0°C and standard
deviation 1.00°C.
Find P80, the 80-percentile of the distribution
of temperature readings. This is the temperature reading separating
the bottom 80% from the top 20%.
________________°C Round to 3 decimal places.
4)For a standard normal distribution, given:
P(z < c) = 0.8787
Find c. In other words, find the z-score that has 0.8787 to its
left.
____________
1) Bringing all of section 6.2 together... A company knows that replacement times for the DVD...
Company XYZ know that replacement times for the DVD players it produces are normally distributed with a mean of 6.7 years and a standard deviation of 1.6 years. Find the probability that a randomly selected DVD player will have a replacement time less than 2.2 years? P(X < 2.2 years) = Enter your answer accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted. If the company wants to provide a...
IN UUTUULLIS Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 16.3 years and a standard deviation of 1.1 years. Find the probability that a randomly selected quartz time piece will have a replacement time less than 14 years? P(X< 14 years) = Enter your answer accurate to 4 decimal places. Answers obtained using exact 2-scores or 2-scores rounded to 3 decimal places are accepted If the company wants...
1. 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 the probability of obtaining a reading less than 1.089°C. P(Z<1.089)=P(Z<1.089)= (Round answer to four decimal places.) 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...
Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 10.6 years and a standard deviation of 1.2 years. If the company wants to provide a warranty so that only 3.8% of the quartz time pieces will be replaced before the warranty expires, what is the time length of the warranty? warranty = years Enter your answer as a number accurate to 1 decimal place. Answers obtained using exact z-scores...
Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 10.6 years and a standard deviation of 1.2 years. If the company wants to provide a warranty so that only 1.3% of the quartz time pieces will be replaced before the warranty expires, what is the time length of the warranty? warranty = years Enter your answer as a number accurate to 1 decimal place. Answers obtained using exact z-scores...
Section 6.2 Graphs of the Normal Distribution Score: 10/14 11/14 answered' Question 8 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 the probability of obtaining a reading greater than 0.05°C. Please show your answer to 4 decimal places. Probability - Submit Question
Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 15.4 years and a standard deviation of 1.4 years. Find the probability that a randomly selected quartz time piece will have a replacement time less than 12.6 years? P(X < 12.6 years) If the company wants to provide a warranty so that only 3.2% of the quartz time pieces will be replaced before the warranty expires, what is the time...
1. 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 the probability of obtaining a reading less than -0.864°C. P(Z<−0.864)= 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...
QC Problem 1 Specifications for a critical part for a DVD player state that the part should weigh between 22 and 26 ounces. The process that produces the parts yields a mean of 24.5 ounces and a standard deviation of 0.85 ounce. The distribution of the weights of the part is normal. Hint: this is an application of the normal distribution. A similar problem appeared in the reliability chapter assignment. a) What percentage of parts will meet the weight specifications?...
Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1 C 0.2206 z 0 The indicated z score is (Round to two decimal places as needed.) Enter your answer in the answer box Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1. 0.7517 z 0 The indicated z score isa (Round to two decimal places as needed.) Enter vour answer in...