A study of working actors looked at age and gender. One sample of 50 male actors had a mean age of 26 and a standard deviation of 3. The other sample included 50 female actors with a mean age of 32 and a standard deviation of 2. Estimate with 98% confidence the difference between the average ages of working male (μ1) and female (μ2) actors. Round answers to the nearest hundredth. < μ1−μ2<

Q: he ages of people living in a retirement community are normally distributed with a mean age of 68…

A: Let X denote the ages of people living in a retirement community and it follows normal distribution…

Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: Solution

Q: The weights of adult California Condors average 14.8lbs with a standard deviation of 3.25lbs.…

A:

Q: The mean wingspan of a sample of 31 birds of a particular species is 30 inches.  The standard…

A: Sample size n =31 Sample mean=30 Population standard deviation =4

Q: A student made three measurements of the mass of an object using a balance (± 0.01 g) and obtained…

A: Given Data: Measure # 1 4.39 ± 0.01 g Measure # 2 4.42 ± 0.01 g Measure # 3 4.41 ± 0.01 g

Q: A variable is normally distributed with mean 10 and standard deviation 3. Find the percentage of all…

A: Given  μ =10,σ=3 X~N(μ =10,σ2 =32)  We want to find the probability  P(73&lt;X&lt;80)= ?  Note: This…

Q: A survey collected data from a random sample of 121 people living in Jade city. The sample average…

A: It is given that the sample mean is 23.28.Using the given information, the standard error of the…

Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…

A:

Q: study of working actors looked at age and gender. One sample of 75 male actors had a mean age of 25…

A: Given that  Sample Mean 1 (\bar X_1)(Xˉ1​) = 2525 Sample Standard Deviation 1 (s_1)(s1​) = 22…

Q: In a​ country, the mean time served by prisoners released from prison for the first time is 31.5…

A: Mean time = 31.5Standard deviation = 16.3

Q: We want to estimate the true pH of a test tube of solution. The pH meter is known to have a standard…

A:

Q: The scores on a mathematics exam have a mean of 71and a standard deviation of 8. Find the x-value…

A: Let X denote the scores on a mathematics exam and it follows normal distribution with mean of…

Q: researcher in a large university claimed that the mean health care expenses differ from the national…

A: From the given information, Consider,  μ=$1570n=50x=$1680s=$180α=0.05

Q: A population has mean  =μ17  and standard deviation  =σ18 . Find  μx  and  σx  for samples…

A: The given values in the problem are:Population mean (μ) = 17Population standard deviation (σ) =…

Q: A researcher wishes to see if there is a difference in the manual dexterity of athletes and that of…

A: Sample mean for athletes x¯1=89 Sample mean for band members x¯2=95 Standard deviation σ=7.4 .…

Q: Unfortunately, arsenic occurs naturally in some ground water.t A mean arsenic level of u= 8.0 parts…

A: We have given that  Sample size n=36 ,xbar = 7.1 ,mu=8bbp ,s=2.2 and level of significance =0.01

Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: Sample size Sample mean Population standard deviation

Q: In a study, a large sample was used to estimate the mean systolic blood pressures in a population,…

A: Solution : Given : μ = 120.1             σ = 15.1 Let , X : Systolic blood pressures Here, X ~ N (…

Q: an =125 and standard deviation a= 14. d the 80th percentile of the distribution of systolic blood…

A: Let x denote the systolic blood pressure of males . Here x is approximately normally distributed…

Q: An experiment was conducted to estimate the effect of smoking on the blood pressure of a group of 31…

A: The sample size is 31, sample mean is 9.1 and sample standard deviation is 5.3.

Q: In a study conducted at a local school, it was found that their students spent an average of u =4.61…

A: Given: μ = 4.61σ = 0.96X = 3

Q: You are studying the velocities of projectiles. Prior experience tells you that standard deviation…

A: Given, Standard deviation = 5.7 Error = 0.91 confidence level =92%

Q: Radon is a colorless, odorless, invisible gas that seeps into residential homes and has been linked…

A: According to the given information in this question First of all we need to know type 1 error, it is…

Q: The weight of newborn babies is normally distributed, with a mean of 3.7 kilograms and a standard…

A: GivenThe weight of new born babies are normally distributed.The mean =3.7 KgThe standard deviation…

Q: Suppose that the hemoglobin levels among healthy females are normally distributed with a mean of…

A: It is required to find the standard deviation of the distribution of hemoglobin levels in healthy…

Q: Suppose that the TSH(Thyroid Stimulating Hormone) levels among the healthy individuals are normally…

A: From the provided information, Population mean (µ) = 3.3 units/mL Let population standard deviation…

Q: In a population of exam scores, a score of X = 88 corresponds to z = 2 and a score of X = 79…

A: From the provided information, A score of X = 88 corresponds to z = 2 A score of X = 79 corresponds…

Q: Consider the experiment of picking a random vowel and let E be the event defined as {eu} The result…

A: From given data, Event E is define as , E = {e , u} we need to check that result :  o can occur…

Q: A Christmas tree light has an expected life of 200 hr and a standard deviation of 3 hr. Suppose…

A: Given that μ=200 and σ=3. The distribution of the lifetime of Christmas tree light is unknown.

Q: On a recent calculus exam, a class mean was 75 with a standard deviation of 3.4. Calculate the…

A: From the provided information, Mean (µ) = 75 Standard deviation (σ) = 3.4 Let X be a random variable…

Q: The ages of people living in a retirement community are normally distributed with a mean age of 68…

A:

Q: The heights (in inches) of males in the United States are believed to be approximately Normally…

A:

Q: A random sample of men's weights have a sample mean of x¯=182.3 pounds and sample standard deviation…

A:

Q: The human population has a mean IQ score of µ = 100 and a standard deviation of σ = 15. Find the…

A: The normal distribution is the most useful theoretical distribution for continuous variables.…

Q: A photoconductor film is manufactured at a nominal thickness of 25 mils. The pr increase the mean…

A: Solution: Given information: n1=8n2=8x1=1.15x2= 1.06s1=0.11s2= 0.09α=0.10

Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: The sample size is 44, sample mean is 37.5 and population standard deviation is 7.50.

Q: From generation to generation, the mean age when smokers first start to smoke varies. A survey of 20…

A: Given Information :  From generation to generation, the mean age when smokers first start to smoke…

Q: The scores on a test are normally distributed with a mean of 150 and a standard deviation of 30.…

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

Q: Total plasma volume is important in determining the required plasma component in blood replacement…

A: (b)   Identify the conditions that are necessary for the calculations.   The correct option is…

Q: A population of scores has µ=44. In this population, a score of X= 40 corresponds to z= - 0. 50.…

A:

Q: t the residents of a local town reported sleeping an average of a=7.97 hours each night with a…

A: Given : sample mean= x̅ = 7.766 population mean=μ = 7.97

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.