The mean speed of a sample of vehicles along a stretch of highway is 67 miles per hour, with a standard deviation of 2 miles per hour. Estimate the percent of vehicles whose speeds are between 63 miles per hour and 71 miles per hour.

Q: The average birth weight of elephants is 220 pounds. Assume that the distribution of birth weights…

A: Solution-: Given: μ=220,σ=50 We want to find the birth weight of elephants at the 90th percentile.

Q: The weights of adult California Condors average 14.8lbs with a standard deviation of 3.25lbs.…

A:

Q: In a herd of longhern cattle the mean horn length is 52cm and h2 is 0.2. Predict the mean horn…

A: Heritability is a measure of additive effects of genes, it tells whether the observation variation…

Q: Find the standard deviation of the observations 5, 11, 18, 25 and 41, using mutual differences…

A: Given: data data values  Xi: 5,11,18,25,41  Then to find standard deviations using mutual difference…

Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…

A:

Q: According to data for a​ population, 3-year-old boys have a mean height of 38 inches and a standard…

A: given data normal distributionμ = 38 inchesσ = 2 inchesfor x = 42 inchespercentile = ?

Q: he mean length of one-year-old spotted flounder, in millimeters, is 124.8 with standard deviation of…

A: Given,μ=124.8σ=13.52P(X<x)=0.92x=?

Q: A set of data has a normal distribution with a mean of 100 and a standard deviation of 15. Find the…

A: First we reduce the given normal distribution to the standard normal distribution using the formula…

Q: Explain the percentage slabs under the Standard Deviation Rule?

A: The percentage of slabs under the standard deviation rule or empirical rule is discussed as follows:

Q: According to a medical journal, the distribution of weights of newborn babies is approximately…

A: The objective of this question is to find the percentage of newborn babies that weigh between 3100…

Q: The velocity of an object can be modeled by an approximately normal distribution with a mean of 70…

A: Let X be the random variable from normal distribution with mean (μ) = 70 and standard deviation (σ)…

Q: The heights of the women in a particular town are normally 143 cm and 168 cm. Using 95.4% of the…

A:

Q: The distribution of the weights of dogs at a local rescue shelter is Normal, with a mean of 38…

A:

Q: lies

A: Let X be the random variable such that the  daily water usage per person in Quezon City. The daily…

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 65…

A: The random variable  be the speed of a sample of vehicles along a stretch of highway.Mean: miles…

Q: The serum cholesterol level in men aged 18 to 74 are normally distributed with a mean of 178.1 and a…

A:

Q: what would be a good hypothesis for calculating the average speed for cars

A: Introduction Hypothesis is an assumption that is being tested.

Q: Use Chebyshev's Theorem to find what percent of the values will fall between 120 and 150 for a data…

A: The percentage of observations that are within k std dev. of the mean is 100(1-1k2)%

Q: The heights of women in a particular community are normally distributed with a mean of 65 inches and…

A: We have to find given proportion..

Q: for a population with a standard deviation of 5 and mean of 48, draw a bell shaped curve, marking…

A: Given data, Mean=48 sd=5 Draw a bell shaped curve?

Q: The mean life of a battery is 55 hours with a standard deviation of 6 hours. The manufacturer…

A:

Q: t problem. Use the empirical rule

A: According to the empirical rule, approximately 95% of the observations fall within 2 standard…

Q: The amount of sodium was measured for a sample of 30 different breakfast cereals.  The sample mean…

A: Givensample size(n)=30Mean(x¯)=220standard deviation(s)=77x=408

Q: Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 65…

A: Given that  X~N( μ = 65 , ? = 5 ) μ = 55 , ? = 5

Q: The mean height of women is 62 inches with standard deviation of 4 inches. What percent of women are…

A: From the given information, Mean height (µ) = 62 inches Standard deviation (σ)= 4 inches Thus, the…

Q: standardized test has a pop. mean of 152 and a standard deviation of 16. Jenny has a z score of…

A: Given that n=500, z=-0.56

Q: A lightbulb is advertised as lasting 1000 hours with a standard deviation of 150 hours. Assume the…

A: It is given that the mean and standard deviation are 1,000 and 150, respectively.

Q: The data in a data set are normally distributed with a mean of 190 and a standard deviation of 30.…

A: ∗Mean μ=190    standard  deviation σ=30    X~N 190,30 we need to find,   PX<130+PX>250=P…

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: How does the median birth weight compare to the average birth weight?

A: Given that birth weights of children born in the United States are normally distributed with mean =…

Q: Assume that a data for pulse rates of 50 participants is ollected. The mean pulse rate has the mean…

A: Range rule of thumb: The values are significant if it is lies within 2 standard deviations away from…

Q: A researcher believes the mean weight of male turtles is more than 205 pounds, she samples 18 male…

A: Denote μ as the population mean weight of male turtles.   The claim is that the mean weight of male…

Q: What is the proportion of vehicles less than or equal to the speed limit?

A: Let , X→N(μ=71 , σ=8) Our aim is to find the proportion of vehicles less than or equal to the speed…

Q: Adult women in the U.S. have a mean height of 64.3", with a standard deviation of 2.58 inches.…

A:

Q: How is standard deviation a measure of distance?

A: We know that the standard deviation is the measure of the dispersion of data which is based on…

Q: The length in feet of a structural I-beam is normally distributed with a mean of 6 ft and a standard…

A: From the provided information, Mean (µ) = 6 ft Population standard deviation (σ) = 1 inch Quality…

Q: A luxury furniture manufacture will make custom furniture for their customers. Pricing is based on…

A: The question is about normal distribution Given : Popl. avg. of time to make a custom couch ( μ ) =…

Q: the average height on the soccer team is 66 inches with a standard deviation of 3. a z score of -1.6…

A: Introduction: Consider X as a normally distributed random variable, with mean μ and standard…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.