You measure 49 texbook's weights, and find they have a mean weight of 85 ounces. assume the population standard deviation is 3.6 ounces. Based on this, construct a 95% confidence interval for the true population mean textbook weight. round your answer to 2 decimals

Q: Americans spend an average of 5 hours per day online. If the standard deviation is 33 minutes, find…

A: Given,Mean, μ = 5 hours = 5×60 = 300 minutes.Standard deviation, σ = 33 minutes.We need to find the…

Q: Sergio is doing a long hike and is carefully calculating his pack weight. An energy bar has mean…

A: An energy bar has mean weight 1.75 ounces An energy bar has standard deviation 0.019. A juice box…

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: Use the magnitudes (Richter scale) of the 120 earthquakes listed in the accompanying data table. Use…

A: Given Information:- 3.28 2.80 2.84 1.95 1.68 2.51 2.44 3.45 3.94 1.60 2.88 1.62 2.59 3.96 2.49 2.42…

Q: A population has mean 49 and standard deviation 5. What is the data value that has a z-score of 2?…

A:

Q: lves have a mean  weight of 100 pounds, with a standard deviation of 24 pounds. Find the weight…

A: Find the weight range for the central 82% of the wolves.

Q: A successful basketball player height is 203 cm. His converts to the z score of 4.10. How many…

A: Consider, X = 203  z-score = 4.10 z-score is a numerical value that tells the number of standard…

Q: The weight of football players is normally distributed with a mean of 200 pounds and a standard…

A: Given,mean(μ)=200standard deviation(σ)=25

Q: This looks like another problem. Read carefully. Sergio is doing a long hike and is carefully…

A:

Q: Find the standard deviation for the population data set. You must clearly show your work with…

A: Given data 2, 5, 9, 11, 13 Mean,  x = ∑i xin= 2+5+9+11+135 = 8 xi (xi-x¯) (xi-x¯)2 2 -6 36 5…

Q: The mean height of a basketball team is 6 feet with a standard deviation of 0.2 feet. The teams…

A:

Q: A Population has a Mean of 90 and a standard deviation of 25.  A sample of 20 college students is…

A:

Q: You measure the height of 10 people and come up with an average of 70 inches and a standard…

A: x=70s=4n=10 The t scores for 68 inches, t=68-xsn=68-70410=-1.581139

Q: A data set has size of 40. How many observations lie within two standard deviations of either sides…

A: The 68-95-99.7% (Empirical) Rule: For a normal distribution, the empirical rule (68-95-99.7% Rule)…

Q: The weights of 1,000 children average 50kg and the standard deviation is 5kg. How many children…

A: Given  mu=50, sigma=sd=5, n=1000 We want to find How many children weigh between 40kg and 55 kg?

Q: Decide if the following statement is true or false. Explain why. It is possible to have a standard…

A: We need to decide if the given statement that " It is possible to have a standard deviation of -2…

Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…

A:

Q: Sergio is doing a long hike and is carefully calculating his pack weight. An energy bar has mean…

A: Given that an energy bar has mean weight 2.28 ounces and standard deviation 0.061. A juice box has…

Q: The mean height of a basketball team is 6 feet with a standard deviation of 0.2 feet. The team's…

A:

Q: A population has mean 27 and standard deviation 12 . What is the data value that has a z-score of -2…

A: Given data, Mean=27 sd=12 z=-2 x=?

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard…

A: Given: Population mean (µ) = 100 Population standard deviation (σ) = 15

Q: A successful basket ball player has a height of 6 feet 4 inches. Based on statistics his height…

A: As given, The basketball player has a height of 6 feet 4 inches and when his height is converted to…

Q: You measure 31 textbooks' weights, and find they have a mean weight of 33 ounces. Assume the…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

Q: A large chemistry course took their final exam. The mean was 75 with a standard deviation of 8. What…

A:

Q: o these calculations using Excel, a graphing calculator, or an app. Type the data in different…

A: The number of observations is 6.

Q: 90 85 75 76 81 76 75 76 76 96 89 88 73 81 93 76 76 96 89 88 73 81 89 74 74 74 76 86 75 96 79 73 86…

A: x x2 90 8100 85 7225 75 5625 76 5776 81 6561 76 5776 75 5625 76 5776 76 5776 96…

Q: If the range of a data set is 64, find the approximate value of the standard deviation, using the…

A: Given information- Range = 64 We have to find the approximate value of the standard deviation using…

Q: Solve each word problem. Show the conversion of raw score to z-score. Illustrate the appropriate…

A: Let X be the mean score  X ~ N (μ, σ) Given mean μ = 72 Standard deviation, σ = 6

Q: Determine the class average if the standard deviation was 8% and Henry’s mark of 85% is equivalent…

A: Given that,  The standard deviation =8%, Marks of Henry's =85%, and z-score =1.30.

Q: The mean height of Americans in 1776 was 67 inches with a standard deviation of 3 inches.  George…

A: Given,mean(μ)=67 inchesStandard deviation(σ)=3 inches   Empirical rules:1) P(μ-σ<X<μ+σ)=68%2)…

Q: A person in the U.S. eats about 25 pounds of M&M's per year with a standard deviation of 3 pounds.…

A: Solution: Given  μ= 25 Pounds  Population meanσ= 3 Pounds Population standard deviations Assumed…

Q: On a standardized test, Sara had a score of 93, which was exactly 2 standard deviations above the…

A: The normal distribution in the center is generally denser and basically less dense at tails. There…

Q: If 66,500 duracell batteries are manufactured, approximately how many of those batteries

A: Here Given  The life span of Duracell batteries is normally distributed. The mean life span is…

Q: Ten year old girls, the Mean is 54.4, the standard deviation 2.7, 95 percentile in height. How tall…

A: Let  be the height of ten year old girl.The mean: The standard deviation:

Q: Sergio is doing a long hike and is carefully calculating his pack weight. An energy bar has mean…

A: Given: X1=1.71ounces is the mean weight of bar. X2=7.1 ounces is the mean weight of juice box. If he…

Q: A mean of 200 and a standard deviation of 50. Find P60, the score which separates the lower 60% form…

A: