Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 71 miles per​ hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whose speeds are between 61 miles per hour and 81 miles per hour.​ (Assume the data set has a​ bell-shaped distribution.)   Approximately ________ ​% of vehicles travel between 61 miles per hour and 81 miles per hour.

Q: Find the mean of the data summarized in the given frequency distribution. Compare the computed mean…

A: Given that  The following table :  Low Temperature frequency  40-44 3 45-49 5 50-54 11…

Q: Find the standard score and the percentile for a data value 2.5 standard deviations above the mean.…

A: The standard z - score tells you that how many standard deviations, a data value (x) above or below…

Q: A random sample of boarding school students was asked how many 8-ounce servings of soda they had…

A: a) In regression theory, dependent variable is the response variable, which is predicted using the…

Q: Assume that a randomly selected subject is given a bone density test. Those test scores are normally…

A: It is given that the scores follows a normal distribution with mean 0 and standard deviation 1.

Q: b) Rachel received the following scores on the midterm and final examinations in his introductory…

A: The normal distribution is the bell shaped distribution which is centred at the mean. This is also…

Q: If a one-person household spends an average of $76 per week on groceries, find the maximum and…

A: Let the random variable X is the amount of money spent by one - person household. The random…

Q: Find the mean of the data summarized in the given frequency distribution. Compare the computed mean…

A:

Q: Find the standard deviation (rounded to the nearest unit) for the data indicated

A: We have to find the standard deviation based on the given frequency distribution.

Q: 1. The following are the test results for a grade 12 math class of 20 students: 82 85 94 96 72 79 81…

A: Given,  The test result for grade 12  class for 20 students. We have to find the solutions by using…

Q: Find the mean of the data summarized in the given frequency distribution. Compare the computed mean…

A:

Q: Provide an appropriate response. Find the area of the shaded region. The graph depicts IQ scores of…

A:

Q: Part a through b please. Thank you!

A: a. Question 1Let us first determine the confidence interval (the range of values that contain the…

Q: A food safety guideline is that the mercury in fish should be below 1 part per million (ppm). Listed…

A:

Q: Find the mean of the data summarized in the given frequency distribution. Compare the computed mean…

A: Mean is a measure of central tendency. It is the average value of a set of observations. For a set…

Q: Determine the Coefficient of Variation of a data set given the x̅= 2.54 and s = .74. Round to the…

A: GivenMean(x)=2.54standard deviation(s)=0.74

Q: The graph shows the distribution of the number of text messages young adults send per day. The…

A: Given,mean(μ)=128standard deviation(σ)=30

Q: le plot for the data. Choose the correct graph below. 400 500 5 OB. 3.00 2.00 1.00- 0.00- -1.00…

A: Given: The data given is as below 350 100 300 50 0 400 200 100 200 450 50…

Q: Jessica is working on some statistics for her employer.  She finds that the variance of the data she…

A: The variance of the data Person J is analysing is 81.

Q: nd the mean of the data summarized in the given frequency distribution. Compare the computed mean to…

A: The midpoint is, Speed Frequency midpoint fx 42-45 21 42+45/2=43.5 913.5 46-49 13 47.5 617.5…

Q: Scores range from 0 to 200. The mean for Canadian college students is about 115, and the standard…

A: The given data is as follows:Population mean, Population standard deviation, Sample size, Sample…

Q: The graph shows the distribution of the number of text What percentage of young adults send between…

A: GivenMean(μ)=28standard deviation(σ)=30

Q: To find an 88% confidence interval for mean body temperature of healthy US adult women using the…

A: Sample mean, x¯ = 98.382 sample standard deviation = s = 0.712 sample size, n = 50 Here the sample…

Q: Find the critical value. The critical value is zo =. %3D

A: Given α=0.10

Q: Test Score Frequency 90 80 4 70 60 6 50 3

A:

Q: Determine whether each statement below is true or false. About 68% of the data lies within one…

A: To determine whether the given statement is true or false.

Q: Refer to the figure at the right. At a= 0.10, can you reject the claim that the proportion of 18 to…

A: Denote p1, p2 as the true population proportions of 18-24-year-olds men and women, who living in…

Q: Match the description of the sample with the correct plot. Time (in minutes) it takes a sample of…

A: The objective is to match the description of the sample with the correct plot.

Q: Approximately​ 95% of the observations fall within the interval

A: We have given that Mean(x̅) = 79.6 and Standard deviation (s) = 13.9

Q: Before the furniture store began its ad campaign, it averaged 213 customers per day. The manager is…

A: D.   Consider that μ defines the population mean number of customers.   Here, it is needed to check…

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: GivenMean(μ)=0standard deviation(σ)=1

Q: Percentage of 18-to 24-year olds living in parents' homes Refer to the figure at the right. At a =…

A: For the given data perform z test for two proportion test

Q: Find the mean of the data summarized in the given frequency distribution. Compare the computed mean…

A: We know that  Mean = sum of all observations/total number of observations .

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.