2. An employee takes time of her trip from her home to office as normally distributed with a mean of 21 minutes and a standard deviation of 7 minutes. What proportion of her trip takes between 25 and 29 minutes? Draw the graph also.

Q: The average time to travel to work for a person living and working in Grand Rapids is 17 minutes.…

A:

Q: If the average age of retirement for the entire population in a country is 60 years and the…

A: Empirical rule: The probability of the observation lies within 1 standard deviation of the mean,…

Q: the scores are normally distributed with a mean of 75 and a standard deviation of 9. What…

A: Note: As per the guidelines, only first three sub-parts (1., 2. and 3.) are solved here. Given data:…

Q: Need the answer to question 6.

A: (6)The provided information are:

Q: If a set of data has a mean of 12 and a standard deviation of 3, what is the z-score for a value of…

A:

Q: Which of the following is the value of x if in a normal distribution the z – score is -1.25, the…

A: According to the given information, we have Z score = -1.25 Mean = 60 Standard deviation = 9

Q: Suppose weights of newborn babies in one community are normally distributed with a mean of 7.5…

A: Given weights of newborn babies in one community are normally distributed with a mean             =…

Q: Part of a test given to young children consists of putting together a simple jigsaw puzzle. Suppose…

A: GivenGivenMean(μ)=120standard deviation(σ)=18No.of children=4000

Q: Given the figure above is a normal curve, with a mean score of 100 and a standard deviation of 15, a…

A: Given that ; Mean (μ) = 100 ? = 15  The given curve follows standard normal distribution by using…

Q: The graphs below represent two distinct Standard Deviations from two separate samples.A) Which of…

A: Solution: A. From the graph on the left, it can be observed that the frequencies for all the scores…

Q: Given the figure above is a normal curve, The greatest proportion of the scores would be between…

A: Given the figure above is a normal curve, The greatest proportion of the scores would be between…

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: Which of the following values for the population standard deviation would cause a score located…

A: Given different values of standard deviation and we need to select the one which makes value of x to…

Q: A student learns that on his most recent exam in psychology, the sample mean was 72.19 with a…

A:

Q: Which of the below data sets has the lowest standard deviation? You do not need to calculate the…

A: The standard deviation is used to calculate the variability of the data set. It tells us that how to…

Q: The price-earnings (PE) ratios of a sample of stocks have a mean value of 10.75 and a standard…

A: Empirical Relationship: The empirical rule states that if a distribution is unimodal and symmetric…

Q: In one town, the number of pounds of leafy greens consumed per person per year has a mean of 10…

A: (1) Standardized z-score:   The standardized z-score represents the number of standard deviations…

Q: If a distribution of test scores is normal, with a mean of 78 and a standard deviation of 11, what…

A: Given Information: If a distribution of test scores is normal, with a mean of 78 and a standard…

Q: With the new mean and standard deviation, how many standard deviations away from the mean is the…

A: The standard deviation can be considered as the average difference between an observation and the…

Q: Suppose that the price of an item is normally distributed with a mean of 50 and a standard deviation…

A:

Q: 2. In a departmental examination on statistics, the mean grade was 64 and the standard deviation was…

A: Determine the number of students took the examinations.   The number of students took the…

Q: The average grade for an exam is 74, and the standard deviation is 7. If 12% of the class is given…

A: Let the random variable X denote grade score. Then, X~Nμ, σ2 with μ=74 and σ=7. Let α be the lowest…

Q: Activity 3: Answer the following. 1. Suppose the mean is 75 and the standard deviation is 5, sketch…

A:

Q: If a distribution of test scores is normal, with a mean of 78 and a standard deviation of 11, what…

A: If a distribution of test scores is normal, Mean = 78 Standard deviation = 11

Q: QUESTION 3 Consider the price has a normal distribution. The price Mean is 99, and the price…

A:

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard…

A: Solution: Let X be the random variable. From the given information, X follows normal distribution…

Q: Suppose IQ scores are approximately normally distributed with a mean  of 100 and a standard…

A:

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: The empirical rule says that for normal distribution, 68%, 95%, and 99.7% of the values lie within…

Q: The heights of children in a second grade section are normally distributed with mean 52 inches and…

A:

Q: The scores on an economics examination are normally distributed with a mean of 72 and a standard…

A: From the provided information, Mean (µ) = 72 Standard deviation (σ) = 16 Let X be a random variable…

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: Solution: Let X be the e normally distributed with a mean, μ=116 and a standard deviation, σ = 14.…

Q: A distribution of numbers is approximately bell shaped. If the mean of the numbers is 129 and the…

A: a. The two numbers that would fall approximately between 68% of the given values are, Thus, the two…

Q: Question Eight: The length of a machined part is known to have a normal distribution with a mean of…

A: Given :  The length of a machined part is known to have a normal distribution with mean of 100 mm…

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 144 and a standard…

A: From the provided information, Mean (µ) = 144 Standard deviation (σ) = 27 X~N (144, 27)

Q: . If X is a normally distributed random variable with a mean of 235 Find the standard deviation…

A:

Q: Suppose the people living in a city have a mean score of 35 and a standard deviation of 10 on a…

A: Note: Hey, since there are multiple subparts posted, we will answer first three subparts. If you…

Q: a measure of 29 inches "far away" from a mean of 19 inches? Suppose the data come from a sample…

A: We have given that  Mean=19 , standard deviation=2  X=29

Q: A data set is normally distributed with a mean of 6363 and a standard deviation of 10.4.10.4. What…

A: Let X be the data value which follows normal distribution with mean 63 and standard deviation 10.4.…

Q: As shown in the previous question, the average number of siblings (sibs) is about 3.5, with a…

A: A continuous random variable X follows Normal distribution with parameters μ and σ2 if its…

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

A:

Q: 1. In Statistics and Probability examination, the average grade was 74 and the standard deviation…

A: Given that, In Statistics and Probability examination, the average grade was 74 and the standard…

Q: If scores are normally distributed with a mean of 35 and a standard deviation of 10, what percent of…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: In a test, the average of the grades is 80 and the standard deviation is 5. John's grade is 70, so…

A:

Q: B. Solve each problem and construct a normal curve. 1. Your monthly electric bill has a mean of…

A:

Q: 3. The annual per capita consumption of ice cream (in pounds) in the Philippines can be approximated…

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Q: 1) The speed of 100 cars was measured on a road with a speed limit of 90 km/h. The data was found to…

A: We have to find probabiities..

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A:

Q: Exhibit 6-4 The starting salaries of individuals with an MBA degree are normally distributed with a…

A: Let X be the starting salaries of individuals with an MBA degree X~N(μ=40000, σ=5000)

Q: Suppose a population is known to be normally distributed with a mean, μ, equal to 116 and a standard…

A: Given: μ=116σ=14x=102,144 The formula of z-score is:z=x-μσ First we calculate the z-score for x=102.…

Q: 2. The table below shows the recorded speeds of several cars on a busy street: Recorded Speeds (mph)…

A:

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.