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Q: One prominent physician claims that 80% of those with lung cancer are chain smokers. Compute the…
A: Here, we can consider that it is Binomial distribution because 80% of people has lung cancer and…
Q: Salaries for teachers in a particular elementary school district are normally distributed with a…
A: The properties of the normal distribution is, The Normal distribution curve is and bell shaped…
Q: The cruising altitudes for a Boeing 747 are normally distributed with a mean of 35,105 feet with a…
A: Solution
Q: For the 2017 romantic comedy film, The Last Jedi, 300,000 IMDB viewer ratings show a mean of 7.2…
A: The known values are, The value of k is,
Q: The mean assessed value of homes in Southern County is $158,000 with a standard deviation of…
A: Old mean = E(X) = 158000 Old SD = SD(X) = 32000
Q: Dr. Samwell Tarly wants to estimate the number of books checked out of the library in the past year.…
A: It is given that the mean is 10,000 and the standard deviation is 10.
Q: In another company, every worker received a 5% raise. How does this affect the mean salary? The…
A: Every worker received a 5%. The mean defines that the center or average of the data and it is…
Q: Suppose we have data on the ages of U.S. presidents. We also have ages for a sample of high school…
A:
Q: In a normally distributed data set with a mean of 24 and a standard deviation of 4.2, what…
A:
Q: A standardized measure of achievement motivation is modeled by a normal distribution with a mean of…
A: Obtain the achievement score The achievement score is obtained below as follows:
Q: A biologist found the wingspan of a group of monarch butterflies to be normally distributed, with a…
A: A biologist found the wingspan of a group of monarch butterflies to be normally distributed, with a…
Q: An advertising agency has stated that 20% of all television viewers watch a particular program. How…
A: From the provided information, An advertising agency has stated that 20% of all television viewers…
Q: What is the 80th percentile if the mean is 3 and the standard deviation is 0.6
A: It is given that µ= 3, σ= 0.6.
Q: The mean number of minutes for app engagement by a tablet user is 8.2 minutes. Suppose the standard…
A: GivenMean(μ)=8.2standard deviation(σ)=1sample size(n)=60
Q: The mean annual income for people in a certain city (in thousands of dollars) is 42, with a standard…
A: The formula for mean of the Z-score is, Z=x¯-μσn Here n is the sample size, μ is the population mean…
Q: The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What…
A: Introduction: Denote the random variable, Denote X as the number of hours of sleep on a weeknight.…
Q: A researcher collected data from Boston police officers and found that on average they spent 14.3…
A: From the provided information, Mean (µ) = 14.3 Standard deviation (σ) = 3.2
Q: On a spelling test, the standard deviation is equal to 0.94. What does this mean
A: We know that the Standard deviation tells us that how much data is scattered around the mean value…
Q: Suppose phone bills have a mean of $78 and a standard deviation of $8. How much would a phone bill…
A:
Q: A recent survey found that 61% of all adults over 50 wear glasses for driving. In a random sample…
A: A recent survey found that 61% of all adults over 50 wear glasses for driving. In a random sample…
Q: The heights of women are approximately Normal with mean 63.7 inchs and standard deviation 2.5…
A: Given information For Women Mean (µ1) = 63.7 inches Standard deviation (σ1) = 2.5 inches For men…
Q: Most graduate schools of business require applicants for admission to take the Graduate Management…
A: From the provided information, Mean (µ) = 527 Standard deviation (σ) = 112 X~N (527, 112) Here X be…
Q: Chris tested a sample of 20 Brand A electronic engine control modules, and they lasted 48,560…
A: The sample mean and standard deviation for Brand A electronic engine control modules is;…
Q: A World Health Organization study of health in various countries reported that in Canada, systolic…
A:
Q: When Lauren runs the 400 meter dash, her finishing times are normally distributed with a mean of 88…
A:
Q: 500 freshmen at Arundel University took part in a math comprehension test. The scores were normally…
A: From the provided information, Mean (µ) = 75 Standard deviation (σ) = 7 Let X be a random variable…
Q: The stature of men is normally distributed, with a mean of 69.0 inches and a standard deviation of…
A: From the given information, the mean of women is 63.6 inches and standard deviation is 2.5 inches.…
Q: In one town, the number of pounds of sugar consumed per person per year has a mean of 6 pounds and a…
A: In one town, the number of pounds of sugar consumed per person per year has a mean of 6 pounds and a…
Q: what is the value of the standard deviation of the weekly earnings of the bus drivers?
A: Let X be the random variable for the weekly earnings of bus drivers.Given that,Population mean
Q: The mean height of males 20 years old or older is 69.1 inches with a standard deviation of 2.8…
A: given data x = height of 20 years old or older μ = 69.1 inchesσ = 2.8 incheskevin's height,x = 83…
Q: In a normally distributed data set a mean of 55 where 95% of the data fall between 47.4 and 62.6,…
A:
Q: The mean number of hours per day spent watching television, according to a national survey, is 3.5…
A: From the provided information, Mean (µ) = 3.5 Standard deviation (σ) = 2
Q: in a group of 230 tests, how many students score within one standard deviation of the mean?
A: The probability that the students score within one standard deviation of the mean will be:…
Q: A baseball team is reviewing their batting statistics. The mean number of hits for the batters on…
A: Given Population mean μ=124, standard deviations σ=14.5 Let X be the baseball team is reviewing…
Q: The heights of 18 year old men are normally distributed with a mean of 67 inches and a standard…
A: Given information- Population mean, µ = 67 inches Population standard deviation, σ = 3 inches We…
Q: The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances…
A:
A video game company studied the time teens spent playing video games each night by surveying 1,500 teenagers. The
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- In a recent survey, 80% of the community favored building a police substation in their neighborhood. If 15 citizensare chosen, what is the standard deviation of the number favoring the substation?A recent study found that 69% of all adults over 50 wear sunglasses for driving. In a random sample of 20 adults over 50, what is the mean and standard deviation of those that wear sunglasses?Most graduate schools of business require applicants for admission to take the Graduate Management Admissions Council GMAT examination. Scores on the GMAT are roughly normally distributed with a mean of 527 and a standard deviation of 112. How high must an individual score on the GMAT in order to score in the lowest 11%?
- In a recent study, the serum cholesterol levels in men were found to be normally distributed with a mean of 196.7 and a standard deviation of 39.1. Units are in mg/dL. Men who have a cholesterol level that is in the top 2% need regular monitoring by a physician. What is the minimum cholesterol level required to receive the regular monitoring? Round answer to the nearest whole number.The average McDonald's restaurant generates $3.1 million in sales each year with a standard deviation of 0.4. Micah wants to know if the average sales generated by McDonald's restaurants in Maryland is different than the worldwide average. He surveys 19 restaurants in Maryland and finds the following data (in millions of dollars):2.8, 3.2, 3.8, 4.2, 3.5, 3.2, 3.6, 3.2, 2.7, 3.1, 2.5, 3.2, 3.7, 3.5, 3.9, 3.9, 2.5, 2.9, 2.8Perform a hypothesis test using a 9% level of significance.Step 1: State the null and alternative hypotheses.H0:H0: Ha:Ha: (So we will be performing a test.)Step 2: Assuming the null hypothesis is true, determine the features of the distribution of point estimates using the Central Limit Theorem.By the Central Limit Theorem, we know that the point estimates are with distribution mean and distribution standard deviation .Step 3: Find the pp-value of the point estimate.P(P( )=P()=P( )=)=pp-value==Step 4: Make a Conclusion…A maths class has 100 members. If there is a 15% absentee rate per class meeting , find the standard deviation of the number of students who will be absent from each class?
- A student earned a 79 on a precalculus exam, and she earned a 92 on a statistics exam. The precalculus exam had a mean score of 72.3 with a standard deviation of 8.4. On the other hand, the statistics exam had a mean score of 87.4 with a standard deviation of 11.4. Determine which exam the student earned a better score on with respect to her peers.In a study of 400 people, the mean age is 50 years and the standard deviation of age is 10 years. What is the standard error of the mean for age?A study by the National Center for Health Statistics suggested that women between the ages 20 and 29 in the US have a mean BMI of 26.8 with a standard deviation of 7.4. A BMI of 30 or greater is considered as being obese. What proportion of women in this age range are obese?
- A large oil company is studying the number of gallons of gasoline purchased per customer at self-service pumps. The mean number of gallons is 10.8, with a standard deviation of 3.0 gallons. The median is 11.75 gallons. What is Pearson's coefficient of skewness in this instance?According to the U.S. Census, the average adult woman is the United States is 65 inches tall and the standard deviation is 3 inches. If Zsike is 67 inches tall, what is her z-score?A company produces different types of drinks. It has been observed that the amount of drink in a bottle is normally disributed with a mean of 500 ml and a standard deviation of 4.75 ml. What percentage of the drink bottles contains 505 to 513 ml
