Suppose the lives (in hours) of a certain type of light bulbs approximately follow a normal distribution with mean u = 2500 and standard deviation o = 500. Use the 68- 95-99 rule to answer Q43-48. 48. About % (percent) of light bulbs have a life above 3500 hours.

Q: The length of human pregnancies from conception to birth approximates a normal distribution with a…

A: Let X be length of time marks the longest 2.16 % of all pregnancies from normal distribution with…

Q: Assume that the mean amount of coffee dispensed is 6 ounces in the standard deviation is 0.6 ounce…

A: We have to find given probability.

Q: About what percent of the products last between 12 and 15 days?

A:

Q: the manager of a radio station wants to estimate the mean age of listeners to a specific program…

A: Given information- Confidence interval = 0.98 Significance level (α) = 1- 0.98 = 0.02 Population…

Q: A normally distributed population has a population mean ? = 21 and standard deviation ? = 4. What…

A: Given Information: Mean = 21 Standard Deviation = 4

Q: The power of a test is 0.873. What is the probability of a Type II error?

A: Power of a test is the probability of correctly rejecting H0 that is the null hypothesis and Type 2…

Q: Supposed a number of students are added to an original group of students where all of whose ages are…

A: Standard deviation: σ=xi-x2n

Q: Assume that the number of pieces per bag has a mean of 72 with a standard deviation of 1.use the…

A: We have to find given probability by using emperical rule...

Q: What percentage of the data will fall between 1 standard deviation below the mean and 2 standard…

A: P(-1<z<2)=?

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 79 beatsminute…

A: Given that population mean = 79 beats/minute population standard deviation = 10 beats/minute

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

A:

Q: otal cholesterol in children aged 10-15 is assumed to follow a normal distribution with a mean of…

A: Z= x-μσ~N(0,1)

Q: The length of human pregnancies from conception to birth approximates a normal distribution with a…

A:

Q: A normally distributed population has a population mean ? = 40 and standard deviation ? = 5. What…

A: It is an important part of statistics . It is widely used .

Q: Assume that math test scores are normally distributed with a mean of 500 and a standard deviation of…

A:

Q: The length of human pregnancies from conception to birth follows a normal distribution with a mean…

A:

Q: According to a recent report, people smile an average of u=62 times per day. Assuming that the…

A: Let "X" be the average number of times that people smile in a day.

Q: The mean age of sales ladies in a department store is 30, with a standard deviation of 6. Between…

A: Given that the mean age of sales ladies in a department store is 30, with a  standard deviation of…

Q: What percent of the total population of data values are included at +/- 1 sigma? +/- 2 sigma? +/- 3…

A: What percent of the total population of data values are included at +/- 1 sigma? +/- 2 sigma? +/- 3…

Q: The mean is 20,000 and the standard deviation is 1000, use the 68-95-99.7 rule to find the…

A: We have given that the mean is 20,000 and the standard deviation is 1000.

Q: The battery of cellphones tend to work less efficiently the longer you have your phone and…

A:

Q: calculate that the mean age of students, where 30 is the mean and standard deviation is 6. Between…

A:

Q: Average temperatures in MMáy in a certain city are normatly distributed with a mean ef 70 degrees…

A: From the given information, Consider, X is the temperatures in May that follows normal distributed…

Q: Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean…

A:

Q: An original population of scores with a mean = 50 and SD = 6 is standardized to create a new…

A: given data  1 represents original population 2 reperesents new distributionμ1 = 50μ2 = 80σ1 = 6σ2 =…

Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of  79…

A: Given,mean(μ)=79standard deviation(σ)=10

Q: a dataset with a mean of 60 and a standard deviation of 8, how many observations are expected to…

A: The mean of a dataset is The standard deviation is The data is considered to follow normal…

Q: The length of human pregnancies from conception to birth approximates a normal distribution with a…

A: From the provided information, Mean (µ) = 268 Standard deviation (σ) = 17

Q: The length of human pregnancies from conception to birth varies according to a distribution that is…

A:

Q: The time it takes for a grade 11 students to complete a physical test is normally distributed with a…

A: X=the time for Grade 11 students to complete a physical fitness test  Given that X follows a normal…

Q: The lifespan of a certain light bulb in (hours) is a Normal model of (400,10)  What do the standard…

A: From the provided information, The lifespan of a certain light bulb follows Normal model (400, 10).

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

A: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: A random sample of 46 adult coyotes in a region of northern Minnesota showed the average age to be…

A: The given sample size is 46, sample mean is 2.03, and sample standard deviation is 0.79. The…

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: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

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.