A study of working actors looked at age and gender. One sample of 70 male actors had a mean age of 29 and a standard deviation of 5. The other sample included 70 female actors with a mean age of 37 and a standard deviation of 4. Estimate with 98% confidence the difference between the average ages of working male (μ1μ1) and female (μ2μ2) actors. Round answers to the nearest hundredth. < μ1−μ2μ1-μ2 <

Q: A health care prifessional wishes to estimate the birth weights of infants. How large a sample must…

A: Given Information :  A health care professional wishes to estimate the birth weights of infants. He…

Q: Using 2016 as the base year, calculate the Pasche’s Price Index for 2021. A    149.86 B    138.60…

A: Given A business analyst has obtained the following information on prices and quantities of three…

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

A:

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

A:

Q: In a survey of 1000 people, mean amount of money they spend on buying Starbuck’s coffee per month is…

A: Solution: a. Let X be the amount of money. From the given information, n=1000, x-bar=19.40, Z=1.96…

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: A psychologist finds that the intelligence quotients of a group of patients are normally…

A: According to the provided information,

Q: ble and highest possibel marks assuming normal distributiion .

A: P(X&lt;5)=Pz&lt;5-589=0

Q: In a population with mean 50 what standard deviation score would have a score of X=45

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Q: The heights of the women in a particular town are normally 143 cm and 168 cm. Using 95.4% of the…

A:

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: samples of n = 100 from

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Q: The weight of newborn babies is normally distributed, with a mean of 3.3 kilograms and a standard…

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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: Suppose that you have a X= 75 on an exam with Ú=70. Which standard deviation would give you a better…

A: Given : Suppose that you have a X= 75 on an exam with Ú=70

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: Assume the mean length of a the female foot is roughly 9.58 in. with a standard deviation of 0.51…

A: From the given information, the mean of 9.58 and a standard deviation of 0.51. The  standard…

Q: A sample of 14 television tubes produced by a company showed a mean lifetime of 1838 hours and a…

A: Given that, n=14σ=233x¯=1838 The formula for calculating the standard deviation of the population of…

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: A quantitative data set of size 80 has mean 45 and standard deviation 2. Approximately how many…

A: The given values are, The formula for calculating the value of k is, The values of k are,

Q: It takes an average of 9.1 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: The sample size is .The sample mean is .The sample standard deviation is .The significance level is…

Q: Write down the formulas for the standard deviation of x.

A: The formula for the sample standard deviation can be written as: Here, n is the sample size and x̅…

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: help please answer in text form with proper workings and explanation for each and every part and…

A: Step 1 Step 2 Step 3 : Step 4

Q: A lightbulb is advertised as lasting 1000 hours with a standard deviation of 150 hours. Assume the…

A: It is given that the mean and standard deviation are 1,000 and 150, respectively.

Q: A quantitative data set of size 80 has mean 30 and standard deviation 6. Approximately how many…

A: From the provided information, Population size (N) = 80 Mean (µ) = 30 Standard deviation (σ) = 6 X~N…

Q: Consider again the birth weights of newborn babies, where the mean weight is 3290 grams and the…

A: From the provided information,Mean (µ) = 3290Standard deviation (σ) = 520X~N (3290, 520)

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: the average height on the soccer team is 66 inches with a standard deviation of 3. a z score of -1.6…

A: Introduction: Consider X as a normally distributed random variable, with mean μ and standard…

Q: The average age of senators in the 108th Congress was 62 years. If the standard deviation was 12.5…

A: Solution: Let X be the age of senator. From the given information,

Q: A California lake has been stocked with rainbow trout. These trout have an average length of 24…

A: Given Information: Mean μ=24 Standard deviation σ=3 Someone goes fishing and catches a trout that is…