The data set has size 90. Approximately how many observations lie within two standard deviations to either side of the​ mean?

Q: For a set of data that cannot be assumed to be distributed in a bell shape, approximately what…

A: Our aim is to find the percentage of values will be between the mean and two standard deviation.

Q: The data set has size 60. Approximately how many observations lie within three standard deviations…

A: From the empirical rule

Q: A quantitative data set of size 70 has mean 25 and standard deviation 4. at least how many…

A: It is given that the mean is 25 and standard deviation is 4.

Q: A quantitative data set of size 150 has mean 35 and standard deviation 4. At least how many…

A:

Q: A quantitative data set of size 80 has mean 30 and standard deviation 5. At least how many…

A: Given information- Sample size, n = 80 Mean, μ = 30 Standard deviation, σ = 5 We have to find the…

Q: According to Chebyshev's rule, within 10 standard deviations from the mean, lies at least of any…

A: Given Information: According to Chebyshev's rule, within 10 standard deviations from the mean, lies…

Q: A quantitative data set of size 60 has mean 45 in standard deviation six. Approximately how many…

A: Given observation Sample size = 60 Mean = 45 Standard deviation = 6 finding the value of z

Q: The distribution of heights of men is approximately Normal with mean 69.269.2 inches and standard…

A:

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: A quantitative data set has size 40. At least how many observations lie within two standard…

A: Introduction: Suppose X is a random variable with expectation, μ and standard deviation, σ. Then,…

Q: the data set has a size 50, how many observations lie within 2 standard deviations of the mean

A: From the provided information, Sample size (n) = 50 The observations lie within 2 standard…

Q: The data set has size 50. Approximately how many observations lie within one standard deviation to…

A:

Q: A quantitative data set has size 80. At least how many observations lie within two standard…

A: It is given that a quantitative data set size is 80.

Q: A quantitative data set of size 87 has mean 80 and standard deviation 10. At least how many…

A: To obtain standard deviation distance from mean to 100,

Q: Given the data 18, 23, 26, 29, find the standard deviation to two decimal places answer rounded to…

A:

Q: The diameters of watermelons at a local supermarket are normally distributed with a mean of 10…

A: Let X denote diameters of watermelons at a local supermarket. Given that X follows Normal(mean = 10,…

Q: Write the steps of calculating the population standard deviation.

A: Standard deviation: The standard deviation is based on how much each observation deviates from a…

Q: Given that the variance for a data set 1.20, what is the standard deviation?

A: The standard deviation is calculated by taking the square root of variance. Variance is given as…

Q: A normal distribution has a mean of 60 and a standard deviation of 20. Barbara's score is 40. What…

A: It is given that the Normal distribution has a mean 60 and a standard deviation of 20.  Suppose X be…

Q: About 68% of the data lie within. standard deviation of the mean One Two Three Four

A: Let X be a random variable follows normal distribution with mean µ and standard deviation σ. X~N (µ,…

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: Find the range and standard deviation for the data items in the histogram below. 5 4 Frequency

A: From the histogram, The frequency table is, Data Frequency 10-20 2 20-30 5 30-40 5 40-50…

Q: Both sets of values have an average of 13 is set a standard deviation smaller larger or about the…

A: Given Information: Both sets of values have an average of 13. To check if set A's standard deviation…

Q: A quantitative data set of size 80 has mean 30 and standard deviation 6. Approximately how many…

A: From the provided information, Population size (N) = 80 Mean (µ) = 30 Standard deviation (σ) = 6 X~N…

Q: For data with a bell shaped about of the data lie within three standard deviation of the mean 68%…

A:

Q: A quantitative data set of size 70 has mean 35 and standard deviation 5. At least how many…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: The data set has 80 observations and has mean 30 and standard deviation 5. Approximately how many…

A:

Q: The distance traveled by a commuter in the city, has a mean of 28 miles and a standard deviation of…

A: Given,mean(μ)=28standard deviation(σ)=6sample size(n)=500

Q: A quantitative data set has a size of 50. At least how many observations lie within seven standard…

A: Suppose X is a random variable with expectation, μ and standard deviation, σ. Then, for any positive…

Q: The data set has 150 observations and has mean 35 and standard deviation 4. Approximately how many…

A:

Q: en the name-brand drug (control group). In the control group, the deviation of 11.5 mmHG. In the t a…

A:

Q: A quantitative data set has size 50. At least how many observations lie within three standard…

A: The size of the data set is 50.

Q: The data set has 200 observations and has mean 20 and standard deviation 4. Approximately how many…

A: It is given that the mean is 20 and the standard deviation is 4.

Q: The data set has size 40. Approximately how many observations lie within two standard deviations to…

A: 68-95-99.7-rule: Let X be an observation from a normal distribution, having mean µ and standard…

Q: The percentage of observations that are contained within 3 standard deviations of the mean is O a.…

A: As per the empirical rule for normal distribution, 68%, 95%, and 99.7% of the values lie within one,…

Q: A quantitative data set has mean 15 and standard deviation 2. At least what percentage of the…

A: It is given that the mean is 15 and standard deviation is 2.

Q: In a study where scientists wanted to compare two different techniques for measuring the amount of k…

A: From the given information, the claim of the problem is the true average difference between the…

Q: Both sets of values have an average of 13.  Is Set A's standard deviation smaller, larger, or about…

A: deviations from mean are more for set A 1-13, 2-13, 3-13, 23-13, 24-13, 25-13, -12, -11, -10, 11, 12…

Q: The data set of size 40 has mean 15 and standard deviation 2. Approximately how many observations…

A: Given Information Mean (µ) = 15 Standard deviation (σ) = 2 Finding the probability for scores that…

Q: The following data give the speeds (in kilometer) as measured by radar of 5 selected cars traveled…

A: The data shows the speeds (in kilometer) as measured by radar of 5 selected cars traveled at NLEX.

Q: A quantitative data set has size 60. At least how many observations lie within three standard…

A:

Q: A normally distributed data set has a mean of O and a standard deviation of 2. What is the percent…

A:

Q: The mean IQ score for 1800 students is 90, with a standard deviation of 10. Assuming the scores have…

A:

Q: Given this data determine a) the mean customer rating and b) the standard deviation for the customer…

A: We have to calculate the mean and SD for the given frequency distribution of customer ratings.

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: Assume that a person in the U.S. eats of M&M's per year follow normal distribution. μ=25σ=3 Let…

Q: The data set has mean 15 and standard deviation 2. Approximately what percentage of the observations…

A:

Q: A nurse at a local hospital is interested in estimating the birth weight of infants. How large a…

A:

Q: The data set has size 80. Approximately how many observations lie within two standard deviations to…

A: Empirical rule: On a normal distribution about 68% of data will be within one standard deviation of…

Q: The variance in a data set is 427. Find the standard deviation. Round to two decimals.

A: The random variable is X. It is given that the variance is 427. We have to find the 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.