the means numbers of minutes it takes to respond phone survey 8.5, with standard deviation of 1.2 minus. the distribution is approx normal. find probability that randomly selected respondents. a) takes more than 10.5 minutes b) takes less than 6.3 mins

Q: Find the probability that the sample mean is between 40 and 50. Sample size is 36 are drawn randomly…

A: From the provided information, Mean (µ) = 45 Standard deviation (σ) = 20 X~N (45, 20) Sample size…

Q: The mean body mass index (BMI) for boys age 12 is 23.6 kg/m2. An investigator wants to test if the…

A: Given  detect a difference in BMI of 2 kg/m2 standard deviation in BMI is 5.7 kg/m2.   Asume that…

Q: The mean time it takes for workers at a factory to insert a delicate bolt into an engine is 15…

A:

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 5…

A: According to the given information, we have Mean = 5 minutes Standard deviation = 1 minutes

Q: Truck delivery fleet travel a mean of 110 miles per day with a standard deviation of 25 miles per…

A: Obtain the Z-score for the random variable X equals 97. The Z-score for the random variable X equals…

Q: Scores for a standardized test are normally distributed with a mean of 1200 and a standard…

A: given data μ = 1200σ = 60 normal distributionn = 64P(1200<x¯<1214) = ?

Q: A teacher says that the top 9​% of the class received an A on the last test. The scores were…

A: Given that the mean is 67 and the standard deviation is 18. That is, μ=67, σ=18 A teacher says that…

Q: 1.29% of fly balls are hit further than what distance? • What distribution will you use to calculate…

A: 1)We have given that theMeanµ = 269Standard deviationsσ = 71Let X be a random variable denoting…

Q: Find the z-score for a single member of the population which has value 86. if the population has a…

A:

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A:

Q: Compute the standard deviation of the sampled proportions if p=.4 and n=500. Round to three places.

A: We want to find standard deviation  X~Binomial(n=500,p=0.4)

Q: The scores on the exam public health professionals take to be certified follows a normal…

A:

Q: Trucks in a delivery fleet travel a mean of 130 miles per day with a standard deviation of 39 miles…

A: The data on per day mileage of a delivery truck is normally distributed. Population mean, Population…

Q: b) Suppose you select 4 chocolate bars at What is the probability that the mean weight of 4 randomly…

A: The distribution of actual weights of 8-ounce chocolate bars is approximately normal with a mean of…

Q: Assume that the readings on thermometers are normally distributed with a mean of 0 degrees Celsius…

A: We have given that Mu= 0 , sigma =1 X~ N ( 0, 1) Zscore=(x-mu)/sigma

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: mean=145.2cm S.D=2.2cm

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 6…

A: Mean=M=6, Standard deviation=S=3X~N(M=6, S=3)

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

A: It is given that the ratings are normally distributed with mean 200 miles and standard deviation 50.

Q: Assume that blood pressure readings are normally distributed with a mean of 123 and a standard…

A:

Q: IQ scores for students at a prestigious university are normally distributed with a mean of 110 and a…

A:

Q: The percent of fat calories that a person in America consumes each day is normally distributed with…

A: Let  be the percent of fat calories that a person in America consumes each day.The random variable…

Q: The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of…

A: Given: mean = 0.963 grams, standard deviation = 0.312 grams. The z-score follows standard normal…

Q: ticular fruits weight are normally distributed with a mean of 285 grams and a standard deviation of…

A: According to the sum, A particular fruit weight is normally distributed with a mean of 285 grams and…

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 7…

A:

Q: Trucks in a delivery fleet travel a mean of 120120 miles per day with a standard deviation of 3333…

A: Given that, Mean (m)=120 Standard deviation (sd) = 33 The mileage per day is distributed normally.…

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 5…

A: given data,normal distribution μ=5σ=3probability that person will wait more than 9 minutes =?

Q: Trucks in a delivery fleet travel a mean of 100 miles per day with a standard deviation of 19 miles…

A: Given that, μ=100σ=19 Let X denote the mileage per day and it follows normal distribution. That is,…

Q: Assume IQ scores for adults are normally distributed with a mean of 100 and a standard deviation of…

A:

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 5…

A: Here, mean is 5 and standard deviation is 3. We will use z-standard normal distribution.

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is…

A:

Q: a. What is the distribution of X? X - N( b. Find the probability that a randomly selected person…

A: Given, Mean =μ = 12Standard Deviation =σ = 5

Q: Assume that a nomral distribution has a mean of 22 and a standard deviation of 7. What percentage of…

A:

Q: The average number of minutes per week that teenagers spend texting is 250.0. Assume the standard…

A: Normal distribution is a continuous distribution which has many real life applications. Normal curve…

Q: The time it takes for a statistics professor to mark a single midterm test is normally distributed…

A:

Q: The scores on the exam public health professionals take to be certified follows a normal…

A:

Q: MCAT scores are normally distributed with an average score of 500.5 and a standard deviation of…

A: Given Information:Mean, μ=500.5Standard Deviation, σ=10.5To find out the probabilty of getting a…

Q: Trucks in a delivery fleet travel a mean of 100 miles per day with a standard deviation of 38 miles…

A:

Q: SAT college entrance test scores are known to be a normally distributed with a mean of 1045 and a…

A:

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.