The percentage of vehicles on a freeway that violate the speed limit is π = 0.88 You randomly clock  n = 80  vehicles.   34 In the previous question, what is the standard deviation of the number of vehicles violating the speed limit?   a 2.761               b 2.907               c 3.060               d 3.221

Q: The average salary for bank managers in a certain city is $91,900 pesos per hour with a standard…

A:

Q: Find the z-score for the value 62, when the mean is 56 and the standard deviation is 2. O A. z=3.00…

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Q: The time taken to download a particular app has been found to be normally distributed, with an…

A:

Q: Find the probability that the weekly unemployment benefit for a person in Idaho is less than U.S.…

A: Let , X→N(μ=272 , σ=43) Our aim is to find the probability that the weekly unemployment benefit for…

Q: The proportion of men who smoke cigarettes in the US is 0.23.  A researcher took a sample of 200 men…

A: Sampling Distribution of Proportion: Standard deviation of sampling distribution of sample…

Q: The diastolic blood pressures (DBP) of a group of 100 young men are normally distributed with a mean…

A:

Q: Find the​ z-score for the value 87​, when the mean is 82 and the standard deviation is 8. A. z=−0.96…

A: Given,mean(μ)=82standard deviation(σ)=8and the value(x)=87

Q: A dish contains 4 blue and 3 red M&Ms.  You grab 4 M&Ms from the dish.  X is the number of red M&Ms…

A: Given : A dish contains : 4 blue and 3 red M&Ms

Q: ant nursery, the owner thinks that the lengths of seedlings in a box sprayed with a new kind of…

A: Hypothesis testing is conducted for the parameters of the population, like population mean,…

Q: The time taken to complete a 25km race is normally distributed, with an average  time (μ) of 2.30…

A:

Q: Q2: The diameter of the dot produced by a printer is normally distributed with a mean diameter of…

A: Given : Diameter of the dot is normally distributed with mean 0.002 and standard deviation 0.0004

Q: From a normally distributed population, we took a simple random sample of 700 students with a mean…

A: Sample size n=700 Sample mean x¯=640 Population Standard deviation σ=300

Q: Q4. Suppose that the daily miles driven by a trucking company is normally distributed with a mean of…

A: Mean(µ) = 330Standard deviations (σ) = 115X ~ N (µ, σ )= N(330, 115)

Q: A pharmaceutical company claims that a medicine will produce a desired effect for a mean time of…

A:

Q: In the first quarter of 2019, the average home loan for first time buyers was R950, 000. Assuming a…

A: Here, µ = 950,000 and σ = 70,000.

Q: The Internal Revenue Service reports that the mean federal income tax paid in a recent year was…

A: From the given information, μ=8040σ=5000n=100

Q: The average salary of bank managers in a certain city is $91,900 pesos per hour with a standard…

A:

Q: A radio station claims that the amount of advertising per hour of broadcast time has an average of…

A: We have given the following information provided Standard deviation = 2.2 Raw score (X) = 16

Q: In the previous question, to obtain a margin of error of ±$20 for a 95% interval estimate the…

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Q: The annual per capita consumption of bottled water was 33.6 gallons. Assume that the per capita…

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Q: Drivers pay an average of u = $690 per year for automobile insurance. The distribution of insurance…

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Q: A manufacturer claims that a new design for a hands-free bluetooth device has increased the range to…

A: The following information is provided. Sample size, sample mean and sample standard deviation.…

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Q: A recent survey indicated that the average amount spent for breakfast by business managers was $8.0…

A: Givensample size(n)=81Mean(x)=8.5standard deviation(s)=2.5

Q: Watching TV The 2012 general Social Survey asked a large number of people how much time they spent…

A: Given

Q: A distribution of values is normal with a mean of 220.2 and a standard deviation of Find P16, which…

A: Let P16 = c So, P(X<c)=0.16  we have to find c.

Q: In a random sample of 1000 students, 70% prefer to study at the school campus. The standard error…

A: Solution: Given:   n: size of random sample  = 1000 p: sample proportion          = 0.70…

Q: The probability of a transformer that has been refurbished at a factory being defective is 0.12. An…

A: Given that - The probability of a transformer that has been refurbished at a factory beingdefective…

Q: local competitive board game club only admits members who gain an accumulated competition score that…

A: According to our policy we can answer only first question for remaining please repost the question.

Q: Studies on a machine that molds plastic water pipe indicate that when it is injecting 29.98 mm…

A: Given : The pipe has a specification of 29.98 mm plus or minus 1.81 mm Lower spec limit ( LSL) =…

Q: The fat content of burgers is normally distributed with a mean of 200 milligrams and a standard…

A:

Q: Based upon past flight data, the average weight of checked baggage was 44.5 pounds with a standard…

A: Given that  X~N( μ = 44.5 , ? = 3.6 ) μ = 44.5 , ? = 3.6 , n = 400 Z-score =( x - μ )/?

Q: A researcher was testing the number of pop corn kernels that popped out of a mini bag of 100 kernels…

A: Given a researcher was testing the number of pop corn kernels that popped out of a mini bag of 100…

Q: A popular restaurant chain advertises that it delivers orders within 30 minutes. Suppose the average…

A: Z=(x -mu ) ÷sigma

Q: 3. Assuming you obtained a random sample of blood glucose levels from 32 individuals from a…

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A: Normal distribution

Q: An audit finds that the dollar amounts of invoices have a mean of $1,662 and a standard deviation of…

A: we have given that mu=1662 ,sigma =302 , n=50  X~N(mu=1662 , sigma^2=302^2) X is a normally…

Q: The annual precipitation amounts in a certain mountain range are normally distributed with a mean of…

A: Mean(µ) = 88Standard deviations (σ) = 10 X ~ N (µ, σ )= N(88, 10)

Q: In a mango farm of 250 trees, the mean harvest is 96.5 kilos of fruit per tree with a standard…

A: Mean Harvest = μ =  96.5 kilos standard deviation, σ = 8.4 We have to calculate :  P⁡(X<100)  :…

Q: A random sample of 30 students had a final exam average of 86 with a standard deviation of 2 points.…

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Q: random sample of 64 SAT scores of students applying for merit scholarships showed an average of 1400…

A: Given that Random sample size (n) = 64 Average (x¯) = 1400 Standard deviation (s) = 240 Confidence…

Q: The ratings of applicants for credit are normally distributed with a mean of 200 and a standard…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: The sample mean and sample standard deviation of all San Francisco student scores on the most recent…

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Q: The annual per capita consumption of bottled water was 30.3 gallons. Assume that the per capita…

A: GivenMean(μ)=30.3standard deviation(σ)=12

Q: Find the z-score for the value 51, when the mean is 65 and the standard deviation is 8, rounding to…

A: Solution: Let X be the random variable. From the given information, µ=65 and σ=8.

Q: The weights of the contents of cans of tomato sauce produced by a company are normally distributed…

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Q: A farm hatches chicken eggs in batches of 15 and there is a 3% infertile rate. Find the standard…

A: Obtain the standard deviation for the number of infertile eggs per batch.   The standard deviation…

Q: The average score on a communications exam was found to be 82 with a standard deviation of 5 points.…

A: From the provided information, Mean (µ) = 82 Standard deviation (σ) = 5 X~N (82, 5) Here X be a…