Assume that the weight of a one-year-old is normally distributed with a mean of 9.5 kg and a standard deviation 1.1 kg. Without using a calculator, state whether the following conclusions are right or wrong:   Not more than 20% of the girls should have a weight less than 4 kg 95% of the girls have a weight between 3 kg and 11.7 kg 3% of the girls have a weight more than 8 kg

Q: 2. The average time spent sleeping (in hours) for a group of medical residents at a hospital can be…

A: Given that  X~N(μ= 6.1 , σ= 1) μ= 6.1 , σ= 1 Formula for Z-score Z=(X-μ)/σ

Q: a certain country the heights of adult men are normally distributed with a mean of 66.4 inches and a…

A: According to the given information in this questionWe need to find the what percentage of this​…

Q: The drive distance (in yards) for professional golfers is normally distributed with a mean of 308.04…

A: 68-95-99.7-rule: Let X be an observation from a normal distribution, having mean µ and standard…

Q: The number of orders received daily by an online vendor of used CDs is normally distributed with…

A: The provided information is  µ=210 σ=20 P(X≥246)…

Q: The waist girth of 2,500 employees in a large company follows the normal distribution with mean of…

A:

Q: Women's heart beats per minute  are normally distributed with a mean of 72bpm and a std. dev. of…

A: We have to find the percent of women who would have heartbeats between 48bpm and 96bpm.

Q: The incubation time for Rhode Island Red chicks has a Normal distribution with a mean of 21 days and…

A: Here, mean is 21 and standard deviation is 1

Q: The lengths of pregnancies are normally distributed with a mean of 280 days and a standard deviation…

A:

Q: For what lengths will a bolt be​ destroyed?

A: here given, mean = 7cm standard deviation = 0.10 cm

Q: Assuming that the heights of college women are normally distributed with mean 64 inches and standard…

A:

Q: YodelAir operates a charter jet service out of an airport in a secluded mountain ski resort. The…

A: Mean=μ=623, standard deviations=σ=120

Q: A senior high school student is concerned about attending college because she heard that many…

A: The mean difference between the one sample and the population mean is calculated using the t test.…

Q: A survey found that​ women's heights are normally distributed with mean 62.3 in. and standard…

A: (A)Let X denote the height of a randomly selected woman. For women, the distribution of heights is…

Q: Mens' heights are normally distrubted with a mean of 68.3 inches and a standard deviation of 2.7.…

A:

Q: What is the standard deviation of a dataset with the following values: 10, 12, 15, 18, 20?

A: Standard deviation is a measure of the amount of variation or dispersion of a set of values. A low…

Q: The combined SAT scores for students at a local high school are normally distributed with a mean of…

A: X follows a Normal distribution with mean = 1497 and S.D = 293 Then z=(x-mean)/SD = (x-1497)/293…

Q: Women's height are normally distributed with a mean of 63.7 inches and a standard deviation of 2.9.…

A:

Q: The middle 55% of jobs should be within what range of times?

A: here given, mean = 50 minute standard deviation  = 6 minute

Q: If an order comes in for 10,000 steel rods, how many rods should the plant manager expect to…

A: Steel rods are manufactured with a mean length of 28 cm. Because of variability in the manufacturing…

Q: Suppose the scores of students on an exam are normally distributed with a mean of 454 and a standard…

A:

Q: Women's heights are normally distributed with a mean of 63.7 inches and a standard deviation of 2.9…

A: Let X be the height of the women X is normally distributed with mean μ = 63.7 inches and standard…

Q: The heights of a pediatrician’s 200 three-year-old females are normally distributed with mean 38.72…

A: We have to find 75th percentile.

Q: Sketch the distribution of heights. What percentage of students are over 73.38 inches tall? What…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The drive distance (in yards) for professional golfers is normally distributed with a mean of 308.04…

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

Q: The length of time for women’s high school volleyball games is normally distributed with a mean of…

A: Given Data Population Mean,μ = 53.0 Population Standard Deviation,σ = 6.0

Q: The carapace length of an adult is normally distributed with a mean of 17.55 mm and a standard…

A:

Q: Women's height are normally distributed with a mean of 64.7 inches and a standard deviation of 3.1.…

A: Given that.   X~N( μ , ?)   μ=64.7     , ?=3.1   Z-score =( x - μ )/?

Q: The weights of ripe watermelons at Mr. Pakwan's farm are normally distributed with a standard…

A: We have to use CLT to find out the unknown mean.

Q: Assume that the hourly cost to operate Saint-Martin Hyundai bus follows the normal distribution with…

A:

Q: What is the greatest amount of time that a newborn can sleep and still be in the bottom 75% of…

A: Let , X→N(μ=15.5 , σ=1.6) Our aim is to find the greatest amount of time that a newborn can sleep…

Q: In a certain country the heights of adult men are normally distributed with a mean of 68.8 inches…

A: Suppose the random variable x defines the height of adult men.

Q: Suppose the scores of students on an exam are normally distributed with a mean of 558 and a standard…

A:

Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…

A:

Q: Suppose the scores of students on an exam are normally distributed with a mean of 253 and a standard…

A: From the provided information, Mean (µ) = 253 Standard deviation (σ) = 80

Q: The admission committee of AUCA enrolls 60% of those who took the exam. If the scores follow a…

A:

Q: A survey found that women's heights are normally distributed with mean 62.3 inches and standard…

A: Mean(μ)=62.3Standard deviation(σ)=2.2

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.