population, it was found that the diastolic blood pressure is normally distributed with a mean 81.5 and standard deviation of 5.5 mm Hg. What proportion of the population have diastolic blood pressures above 80 mm Hg? A. 10.64% B. 39.36% C. 61.79% D. 60.64%

Q: A normal distribution has mean 69.6 and standard deviation 4.05. Find the data value corresponding…

A:

Q: Which of the three normal curves below has the lowest mean? Lowest standard deviation? A (В Lowest…

A: The objective is to identify the normal curve that has the lowest mean and lowest standard…

Q: Based on the table, the standard deviation is 0.5 male. What is the variance? Include appropriate…

A: Given The data is as follows: The standard deviation is 0.5 male.

Q: If the population standard deviation of a normal distribution is 2.8, then find the standard…

A: Answer: From the given data, Population standard deviation = 2.8 number of observations = 68

Q: The average weight of adult females is 166.3 pounds, with a standard deviation of 14 pounds and a…

A: According to the given information in this question We need to find the standardized score for…

Q: The life of a 9-volt battery is normally distributed with a mean of l = 2000 hours and a standard…

A:

Q: The average age of our class is 22.3 years.  The standard deviation is 4.7 years.  If the variable…

A: Solution: Let X be the average age of class has normal  distribution  with mean μ=22.3 years and…

Q: A student took measurements of the mass of an object using the same balance. The data obtained were…

A: Here Given  data of mass of objects using the same balance. Data are  1.383 g, 1,387 g, 1.389 g and…

Q: For a sample of 300 students, you find that the mean GPA is 3.35 with a standard deviation of .21.…

A: Solution: From the given information, Standard deviation is 0.21 and n=300.

Q: What proportion of 10-year old boys is less than 140 cm in height?

A: mean  = 138  standard deviation  = 7  X=  heights of 10-year old boy

Q: What is the best way to evaluate the normal approximation of the variable?   a. Scatter plot…

A: The objective of the question is to identify the best method to evaluate the normal approximation of…

Q: A normal population has a mean μ = 34 and standard deviation σ = 10. What proportion of the…

A: normal distribution μ = 34σ = 10 P(x<51) = ?

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: Birth weights at a local hospital have a Normal distribution, with a mean of 110 oz and a standard…

A: Obtain the standard z-score for the random variable equals 125 oz. The standard z-score for the…

Q: Suppose a normal distribution has a mean of 98 and a standard deviation of 6. What is P(x2 104)? A.…

A: We have given that.   X~N( μ , ?^2 )   μ=98   , ?=6   Z-score =( x - μ )/?

Q: distribution of the number of dill pickle spears in a gallon container is approximately normal with…

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: A normal distribution has a mean of mu = 80 with o = 20. What score separates the lowest 30% of the…

A:

Q: The systolic blood pressure for a healthy person is normally distributed with a mean of 120 and a…

A: Correct Answer is  (d) 118.95

Q: Below is the graph of a normal distribution with mean = standard deviation o = 84 and 2.4

A: Given Information: A graph of a normal distribution with mean μ = 84 and standard deviation σ=2.4 To…

Q: A particular fruit's weights are normally distributed, with a mean of 305 grams and a standard…

A: Given: Formula: Let "X" be the weight of fruits in grams.

Q: A distribution of values is normal with a mean of 235 and a standard deviation of 14.4. Find P63,…

A:

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: A particular fruit's weights are normally distributed, with a mean of 230 grams and a standard…

A: The provided information is:

Q: An IQ of 140 is converted into a z-score of z=1.40. what proportion of the normal distribution is…

A: Given : An IQ of 140 is converted into a z-score of  Z = 1.40

Q: In a sample of 134 ball bearings, the average diameter was found to be 3.78mm with a standard…

A: The sample size of ball bearings, The mean diameter,  mmThe standard deviation, A point estimate for…

Q: Assume that a sample is used to test a normal population mean(μ). A sample of size 33 with a mean of…

A: Answer: From the given data, Sample size(n) = 33 mean (X¯) = 26.2 Standard deviation (S) = 5.4 μ =…

Q: Keeping car tires inflated is essential to safe driving. For one type of car tire, the tire pressure…

A:

Q: A college entrance exam scores are approximately normally distributed with a mean value of 145 and a…

A: Solution: Let X be the college entrance exam score. From the given information, X follows normal…

Q: The weights of Ajax salmon are approximately normally distributed with a mean of 34 pounds and a…

A: GivenMean(x¯)=34standard deviation(σ)=8

Q: The mean score of 100 students taking a statistics final was 70 with a standard deviation of 7.…

A: Note: Since the probability values are given, the probability that the student score less than 65 is…

Q: The monthly incomes of 16 students were analyzed and their average was 1000 TL and the standard…

A: Given data,μ=1000σ=200n=16z=2.7x=?

Q: distribution of values is normal with a mean of 131 and a standard deviation of 37.2. Find P56,…

A: We have the  Mean = 131 Standard deviation= 37.2 We have to find p56.

Q: quick survey of peanut butter prices had standard deviation and mean of $0.26 and $3.68,…

A:

Q: In a population, the variable Rain is normally distributed with a mean of 10 and a standard…

A:

Q: A particular fruit's weights are normally distributed, with a mean of 464 grams and a standard…

A: Let "x" be the weight of the fruit in grams. Sketch the normal curve and shade the area of 0.18…

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

A:

Q: A simple random sample of 144 observations was taken from a large population. The sample mean and…

A: sample mean is given by, x = 120.8 and sample standard deviation is given by, s = 32.46 Number of…

Q: A normal distribution has a mean of 20 and a standard deviation of 2. What is the z value of 17.5?

A:

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.