THE STANDARD DEVIATION
Q: A cement manufacturer claims that the average weight of his product is 40 kgs. with a standard…
A:
Q: On a standardized exam, the scores are normally distributed with a mean of 39 and a standard…
A:
Q: The mean of a normal disiribution is 50 and standard deviation is 12.5. Calculate the 60th, 65th and…
A: Given,mean(μ)=50standard deviation(σ)=12.5
Q: The mean height of students in a class is 152 cm. The mean height of boys is 158 cm with a standard…
A:
Q: On a standardized exam, the scores are normally distributed with a mean of 300 and a standard…
A: To find the z-score of a person who scored 280 on the exam, where the scores are normally…
Q: A basketball player has a scoring average of 0.325 each week of the season, with a standard…
A: Given: μ=0.325σ=0.065
Q: Calculate the standard deviation
A:
Q: The mean weight of 150 students is 60 kgs. The mean weights of boys and girls are 70 ks. and 55 kgs…
A:
Q: The mean gas mileage for a hybrid car is 57 miles per gallon. Suppose that the gasoline mileage is…
A:
Q: The weight of newborn babies is normally distributed, with a mean of 3.3 kilograms and a standard…
A:
Q: The mean length of one-year-old spotted flounder, in millimeters, is 127 with standard deviation of…
A:
Q: The average price of an instrument at a small music store is $345. The standard deviation of the…
A:
Q: ind the standard deviation of the number of accidents per month.
A: The standard deviation of the number of accidents per month is 1.0216 and it is calculated below:
Q: for a population with a standard deviation of 0.03 and mean of 3.08, draw a bell shaped curve,…
A:
Q: Mean typing speed is 90 wpm, with a standard deviation of 18 wpm. What typing speed separates the…
A: Given,mean(μ)=90standard deviation(σ)=18
Q: The standard deviation is now (Round to three decimal places as needed.)
A:
Q: The mean height of trees in the forest of Zambales is 42 ft and the standard deviation is 3 ft.…
A:
Q: On a standardized exam, the scores are normally distributed with a mean of 550 and a standard…
A: The mean is 550 and the standard deviation is 40.
Q: The average monthly allowance of students in a certain university is 7,200 with a standard deviation…
A: Let X be monthly allowance of students in a certain university Mean = μ = 7200Standard Deviation =σ…
Q: The length of pregnancies are normally distributed with mean of 268 days and a standard deviation of…
A: Given : Length of pregnancies = X X is normally distributed Mean of X = 268 days Standard…
Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…
A: μ=69, σ=2.8 & x=79.5
Q: the average height of grade 10 students is 148 cm. a sample of 250 students had an average heigh of…
A:
Q: The mean length of one-year-old spotted flounder, in millimeters, is 124 with standard deviation of…
A:
Q: The mean height of the roses grown in the garden is 28 cm and the standard deviation is 3 cm. If the…
A: GivenMean(μ)=28standard deviation(σ)=3
Q: Adult men have an average height of 69.0 inches with a standard deviation of 2.8 inches. Find the…
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: The mean temperature in Islamabad in the month of January is 16▫c with a standard deviation of…
A:
Q: Adult women in the U.S. have a mean height of 64.3", with a standard deviation of 2.58 inches.…
A:
Q: The average weight of a chicken egg is 57 grams with a standard deviation of 5.1 grams. What is the…
A: According to central limit theorem, for large sample (>30) or if the population follows normal…
Q: A city planner wants to estimate the average monthly residential water usage in the city. He…
A: As the population standard deviation is known, we will use z-distribution. The critical z-value for…
Q: The lengths of metal bolts are normally distributed with mean μ cm and standard deviation 7 cm. If…
A: Let X be the random variable from normal distribution with mean μ and standard deviation (σ) = 2.5…
Q: The average systolic blood pressure of a population of youngmen is mean of population= 112.5 mm, a…
A: Given the average systolic blood pressure of a population of young men is mean of population= 112.5…
Q: The standard deviation of a population of 500 volumes is 85cm. Find out how many units the sample…
A: Given that the population SD = 85 And standard error of mean is not more than 15
Q: The average price for a personal computer (PC) is $949.00. If computer prices are approximately…
A: Draw the normal curve and shade the area of 0.10 to the left of z. Refer Standard normal…
Q: Among 157 patients ,the mean systolic blood pressure was 146 mm Hg with a standard deviation of 27.…
A:
Q: The weight of newborn babies is normally distributed, with a mean of 3.5 kilograms and a standard…
A:
Q: A biologist knows that the average length of a leaf of a certain plant is 4 inches. The standard…
A: Given: μ = 4 σ = 0.6 n = 20 X = 4.2 α = 0.01 Formula Used: Test-Statistic Z = X-μσn
Q: On a recent quiz, the class mean was 75 with a standard deviation of 4. Calculate the z-score (to 4…
A:
Q: On a standardized exam, the scores are normally distributed with a mean of 160 and a standard…
A: We have to find z score.
Q: A car factory knows that its engines have Normal to Average duration 17000 km and standard deviation…
A:
Q: The number of blueberries in a blueberry muffin baked by EarthHarvest Bakeries can range from 22 to…
A: Given information Maximum = 40 Minimum = 22
Q: If the standard deviation of the sugar content of a certain beverage exceeds 4 grams, the beverage…
A: given σ=4, n=20, s=3.8 and alpha=0.01
Q: The average age of Amtrak passenger train cars is about 20 years. If the distribution of ages is…
A: Z= x-μσ~N(0,1)
Q: A certain tennis player makes a successful serve 80% of the time. Suppose the tennis player serves…
A: Given that p=probability of success=p=80%=0.80 So, q=1-p=1-0.80=0.20 n=number of serves= 70
Q: The average number of days construction workers miss per year is 11 with a standard deviation of…
A: The average number of days construction workers miss per year is 11 with a standard deviation of…
Q: About 3 blue whales per month are killed by ship strikes in the Northern Pacific ocean. What is the…
A:
Q: Based from the record, the mean weight of the newborn babies is 4.8 lbs with a standard deviation of…
A:
Q: The average score on the Stats midterm was 79 points with a standard deviation of 4 points, and…
A:
Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…
A: Formula to calculate the z score is,
Q: Solve. Teachers in a certain private school have a mean age of 38 years with a standard deviation of…
A: The percentage of variability in age of teachers is given by =Standard Deviation of ageMean…
Q: The standard deviation of the fuel consumption of a certain car is hypothesized to be equal to 1.72…
A: Solution: From the given information, the sample standard deviation is S=1.04, population standard…
AN ENGINEERING STUDENT`SPENDS BETWEEN 5 MINUTES TO 15 MINUTES EATING HIS LUNCH. FOR THE SITUATION, DETERMINE THE STANDARD DEVIATION ans .2887
Step by step
Solved in 2 steps with 1 images