The average time it takes a certain brand of ibuprofen to start working is 25 minutes, with a standard deviation of 13 minutes, distributed normally. A pharmacist randomly samples 20 pills from this brand, because she is researching different brands in order to find the quickest acting ibuprofen to recommend to her customers. Identify the following to help her make her recommendations, rounding to the nearest hundredth if necessary: μ=​  minutes σ=​  minutes n=​  μx​=​  minutes σx​=​  minutes

Q: A livestock company reports that the mean weight of a group of young steers is 1106 pounds with a…

A: Given: μ=1106 and σ=79.…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 268 days…

A:

Q: the average height of grade 10 students is 148 cm. a sample of 250 students had an average heigh of…

A: Given: μ=148Sample size, n=250sample mean, x¯=148.3sample sd, s=8

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given μ= Mean =71 σ= standard deviation =8  Top​ 10% receive​ A's  Next​ 20% received​ B's Middle​…

Q: In a certain city, the average 20 to 29 year old man is 69.8 inches tall, with a standard deviation…

A:

Q: A livestock company reports that the mean weight of a group of young steers is 1157 pounds with a…

A:

Q: In a PH modeling agency, a researcher wishes to see if the average height of female models is really…

A: Given,sample size(n)=32sample mean(x¯)=66.3sample standard deviation(s)=1.9degrees of…

Q: On a standardized exam, the scores are normally distributed with a mean of 300 and a standard…

A:

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Given, final exam score follows normal distribution mean 73 and standard deviation 8. Grades are…

Q: r at a local zoo is 15.8lbs, with a standard deviation  of 2.4lbs. A researcher records the weight…

A: The table that shows the necessary calculation is shown below:   XX X^2X2 1 14.5 210.25 2…

Q: The grade of OMG 321 was normally distributed with a mean of 81 and a standard deviation of 3.…

A: Let grade=X  X~N(μ=81, σ2=32) μ=81, σ=3 We want to find the P(X>80)= ?  Note: This probability…

Q: The students in an AFDA class have a mean height of 66 inches and a standard deviation of 7 inches.…

A: Mean(µ) = 66Standard deviations (σ) = 7

Q: In a certain factory of rags, the time it takes for the workers to finish one rag is normally…

A: Solution: Let X be the time it takes for the workers to finish one rag. From the given information,…

Q: A local chain of coffee shops is collecting data on the time each customer spends in line before…

A: The histogram shows the frequency of each number of minutes spent waiting in line.

Q: Given a population where p = 0.10, find the standard deviation of the samping distribution when the…

A: It is given that p is 0.10.

Q: A snack company packages bags of popcorn with a mean weight of 55g and a standard deviation of 1g.…

A:

Q: The average time it takes a certain brand of ibuprofen to start working is 25 minutes, with a…

A: Given Information :  The average time it takes a certain brand of ibuprofen to start working is 25…

Q: A company pays its employees an average wage of $22.50 an hour with a standard deviation of $2.30.…

A: The z score is used to test the probability of normal distribution. It is also known as standard…

Q: The installation of a radon abatement device is recommended in any home where the mean radon…

A: a)   Given that the radon abatement device is recommended in any home if the mean radon…

Q: I don't understand how to solve for this. I'm having trouble understanding the percentages

A: Let us define the random variable X as the points for the final exam that are normally distributed…

Q: The mean weight of 500 male students at a certain college is 80 kg, and the standard deviation is 8…

A:

Q: Find the lowest score on the final exam that would qualify a student for an​ A, a​ B, a​ C, and a D

A: Given that the mean value is 76 and the standard deviation is 7. Grades are assigned such that the…

Q: The diameters of watermelons at a local supermarket are normally distributed with a mean of 10…

A: Let X denote diameters of watermelons at a local supermarket. Given that X follows Normal(mean = 10,…

Q: A group of male basketball players has a mean height of 79 inches and a standard deviation of 1.7…

A: Introduction: Denote X as the height of a randomly chosen male basketball player. A group or sample…

Q: Suppose a company produces lightbulbs with a mean lifetime of 1000 hours and a standard deviation of…

A: Given that, Mean= 1000 And standard deviation, sigma= 50 We know that, Z Score= (X-mu)/sigma

Q: Steel rods are manufactured with a mean length of 27 centimeter​ (cm). Because of variability in the…

A: Given,mean(μ)=27standard deviation(σ)=0.06

Q: The amount of time a certain brand of light bulb lasts is normally distribued with a mean of 1500…

A:

Q: On a standardized exam, the scores are normally distributed with a mean of 650 and a standard…

A:

Q: A livestock company reports that the mean weight of a group of young steers is 1106 pounds with a…

A:

Q: The birth weights for twins are normally distributed with a mean of 2353 grams and a standard…

A: The formula to calculate the z score : For part (A), z score is, For part (B), z score is,

Q: In a large section of a statistics​ class, the points for the final exam are normally​ distributed,…

A: Finding the lowest score that would qualify a student for an A grade:The points for the final exam…

Q: If the average American sleeps 8 hours a night, with a standard deviation of 1 hour, and I plan on…

A:

Q: a.   The average age of 12 jurors on a jury is 50 years.     b.   The standard deviation of…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: To see if young men ages 8-17 years spend a different amount than the national average of $24.44 per…

A: Givensample size(n)=35standard deviation(s)=3.70Mean(x)=23.37α=0.05

Q: The weight of oranges growing in an orchard is normally distributed with a mean weight of 6 oz. and…

A: It is given that the mean is 6 and the standard deviation is 1.5.

Q: The wind speeds throughout the month of April were normally distributed with a mean of 17 mph and a…

A: .

Q: The birth weights for twins are normally distributed with a mean of 2353 grams and a standard…

A: Given that, Mean = 2353Standard deviation = 647

Q: Consider the company, which produces lightbulbs with a mean lifetime of 1,200 hours and a standard…

A:

Q: One of the ways in which doctors try to determine how long a single dose of pain reliever will…

A: According to the given question, A report of the National Institutes of Health states that the…

Q: A set of data items is normally distributed with a mean of 40 and a standard deviation of 8. Convert…

A: Given:  Random variable x follow normal distribution with mean mu=40 ,sd=8  Then z score:…

Q: On a standardized exam, the scores are normally distributed with a mean of 170 and a standard…

A: We have to find z score..

Q: A small grocery store, on average, has daily sales of Php28, 176.44. The standard deviation of sales…

A: Solution: Let X be the daily sales. From the given information, µ = Php 28,176.44 and σ = Php 1500.

Q: To determine the organic material in a dried lake bed, the percent carbon by mass is measured at two…

A: F test is used to check whether the variances or standard deviations of two groups differ (or) not.…

Q: The College Board National Office recently reported that in 2011-2012, the547,038 high school…

A: The given information is:

Q: The standard deviation of the base price of a certain type of all-terrain vehicle is equal to $322.

A:

Q: m and 5.50 m. What is the standard deviation

A: Introduction: The Standard Deviation in descriptive statistics is the degree of dispersion or…

Q: a data set has a mean of 210 and a standard deviation of 40, what is the z- Score for a ralue of140…

A: We have given that  Mean =mu=210 , standard deviation(sigma)=40 and x=140 X~N(mu,sigma^2)…