An automobile manufacture builds brakes with a specific diameter. The break data is normally distributed with a mean of 14.8 inches and a standard deviation of 1.3 inches. What percent of manufacture brakes have a size between 12.6 inches and 16.4 inches.

Q: Identify the data value corresponding to the indicated percentile. The amount of sleep an adult gets…

A: Let us define the random variable X as the amount of sleep an adult gets per day is normally…

Q: A set of data has a normal distribution with a mean of 100 and a standard deviation of 15. Find the…

A:

Q: Identify the data value corresponding to the indicated percentile. The heights of women are normally…

A: According to the provided information,

Q: According to data for a​ population, 3-year-old boys have a mean height of 38 inches and a standard…

A: given data normal distributionμ = 38 inchesσ = 2 inchesfor x = 42 inchespercentile = ?

Q: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: The masses of packets of tea can be used to follow a normal distribution with mean 250 grams and…

A: The provided information is  µ=250 σ=5 P(X>y)=0.788…

Q: a bank's loan officer rates applicants for credit. the ratings are normally distributed with a mean…

A: We have to find 60th percentile.

Q: Americans love ice cream .The annual per capita consumption of ice cream ,in pounds ,in the united…

A:

Q: Two different species of trees have heights that are approximately normal in distribution.  Tree A…

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: Find the proportion of Normally distributed observations with a z-score below 2.56. Give your answer…

A: Given Z=2.56

Q: ctrical customers are often told what the average amount of electricity is used for similar homes in…

A: The mean is μ=1650Standard deviation is σ=320z-value at 86% confidence is Zc=1.18x=?

Q: The distribution of the weights of dogs at a local rescue shelter is Normal, with a mean of 38…

A:

Q: The serum cholesterol level in men aged 18 to 74 are normally distributed with a mean of 178.1 and a…

A:

Q: Find the proportion of Normally distributed observations with a zz-score below 3.48. Give your…

A: Let Z be the random variable from standard normal distribution with mean (μ) = 0 standard deviation…

Q: Assume that the average length of some wire is 52 inches with a standard deviation of 6.5 inches. At…

A: Given: The average length of the wire, μ=52 Standard deviation, σ=6.5 We need to determine at most…

Q: What proportion of skiers will finish the race in exactly one minute?

A: The tume it takes for downhill skiers to finish a race follows a Normal distribution with a mean of…

Q: Draw by hand or in Excel fully labelled curves on a common scale to epresent two sets of scores…

A: a. Mean = 25Standard deviation = 4Mean = 50Standard deviation = 4

Q: t problem. Use the empirical rule

A: According to the empirical rule, approximately 95% of the observations fall within 2 standard…

Q: A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose…

A: A) option A is the answer. Answer : Since the distribution of time spent eating and drinking each…

Q: The monthly income of trainees at a local mill is normaly distributed with a mean of $3300 and…

A:

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 65…

A: Given that  X~N( μ = 65 , ? = 5 ) μ = 55 , ? = 5

Q: The heights of women aged 18 to 24 are approximately normal with a mean of 65 inches and a standard…

A: Given that  X~N(μ= 65 , σ= 2.5 ) μ= 65 , σ= 2.5 Formula for Z-score Z=(X-μ)/σ

Q: The stature of men is normally distributed, with a mean of 69.0 inches and a standard deviation of…

A: From the given information, the mean of women is 63.6 inches and standard deviation is 2.5 inches.…

Q: the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 70 miles…

A:

Q: The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 19 people…

A: From the provided information,

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 67…

A: Empirical rule is used in statistics and probability.

Q: The weights of the native North American Blue Jay have a mean of 18.4 ounces with a standard…

A:

Q: Suppose that a certain brand of water filter has a mean life of 600 gallons and a standard deviation…

A: Mean = 600 Standard deviation = 53

Q: 150 mg/DL and a standard deviation of 42 mg/DL. Health experts define a level of 200 mg/DL c more as…

A: It is given asMean = 150Standard deviation = 42

Q: Identify the data value corresponding to the indicated percentile. The amount of sleep an adult gets…

A: The normal distribution:A continuous random variable X is said to follow normal distribution with…

Q: To assess the air quality in a surgical suite, the presence of colony-forming spores per cubic meter…

A: {12,24,30}

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 63…

A: Solution: Let X be the speed of a vehicle along a stretch of highway. From the given information, X…

Q: For a certain type of job, it costs a copany an average of $231 to train an employee to perform the…

A: From the provided information, Mean (µ) = 231 Standard deviation (σ) = 5

Q: The income of trainess at a local mill are normally distributed with a mean of $1100 and a standard…

A: Let Y be the income of trainee mean = μ = $1100 standard deviation = σ = $150

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 65…

A: