Exhibit 8.1. In order to estimate the average time spent on the computer terminals per student at the local university, data were collected from a sample of 81 students over a one-week period. Assume the population standard deviation is 1.2 hours. With a .95 probability, the margin of error is approximately _____.

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A: Let x be the particular fruit's weights which follows normal distribution with mean 670 grams and…

Q: Exhibit 8-12 In order to estimate the average time spent on an exam at a local university, data were…

A: Margin of error explain the error in the data set. It determine by the combined value of standard…

Q: Find the IQ Score.  IQ score  0.3446 Distributed with a mean of 100 and a standard deviation of 15.…

A: Given DataMean = 100Standard deviation = 15Probability of IQ score of adults = 0.3446

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Q: Activity 2 of 3 What percent of Braves players fall between 230 and 270? O A. 95.4% O B. 47.7% O C.…

A: Answer Option c = 68.2% is correct

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

A: since only 5 observation is given we will consider them as sample (n = 5)and population (N = 100)…

Q: Test scores for a history class had a mean of 89 with a standard deviation of 8.9. Suppose a student…

A: According to the given information, we have Mean = 89 Standard deviation = 8.9 Raw score = 67

Q: Reading Improvement Program To help students improve their reading, a school district decides to…

A: Define the Random Variable, X : Score of a student Given that X ~ N(116.8,162) So, Z = X-116.816 ~…

Q: ts luxury sedan is at least 23 miles per gallon (mpg). You believe the claim is incorrect and find…

A:

Q: The population mean is 75 and the population standard deviation = 6. Random samples (containing 16…

A: Given , The population mean ( n )   = 75 ,  the population standard deviation ( σ )= 6

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ…

A: Excel formula: =NORMINV(0.305,0,1)=-0.5100

Q: Español A certain manufacturer makes 400W light bulbs. Assume that these light bulbs have lifetimes…

A: Given that: Population mean=μ=435. Population standard deviation=σ=60.

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Q: Exhibit 6-5 The weight of items produced by a machine is normally distributed with a mean of 8…

A: Given that  Mean = 8 Standard deviation = 2 Find P(X = 8 )

Q: A set of exam scores is normally distributed and has a mean of 79.3 and a standard deviation of 7.4.…

A: Given datanormal distribution μ=79.3σ=7.4choose a random score less than or equal to this 0.0078we…

Q: the average grade is 84 with a standard deviation of 4. What is each grade for -1 2 0 1.5 -1.25

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Q: Each year students in a local school district write a national examination. The average on this…

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A: We have to find given probability.

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Q: Determine if the statement is true or false. In a normal distribution, about 95% of all data values…

A: we know the empirical rules…

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Q: Alice has been in a walking/jogging exercise program for 10 days, and each day she has recorded th…

A: The data set for distance covered for 10 days is1.8,2.1,1.7,1.9,2.3,2.3,2.5,2.4,2.6,2.7sample…

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A:

Q: In order to estimate the average time spent on an exam at a local university, data were collected…

A:

Q: Approximate the standard deviation of age for males. I already know that the population mean is…

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Q: A sample of 9 shoppers at a supermarket is interviewed as they queue at the checkout. The number…

A:

Q: The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 117…

A: Given,mean(μ)=117standard deviation(σ)=18

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A:

Q: Roll a pair of die 36 times, and draw a bar graph of all the outcomes. Using the data, find the…

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A:

Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?

A:

Q: 1.2, 2.7, 5.3, 3.4, 4.1,4.6, 3.3, 2.6. Find the standard  deviation

A:

Q: It takes an average of 13.2 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: As per guideline expert have to answer first question three subparts only dear student please upload…

Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

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Q: The length of time, L hours, that a phone will work before it needs charging is normally distributed…

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