Find the sample size required to estimate the percentage of statistics students who take their statistics course online.  Assume that we want 95% confidence that proportion from the sample is within two percentage points of the true population percentage.

Q: For a population that has a standard deviation of 10, figure the standard deviation of the…

A: Given that  Population standard deviation =10 Then we have to find the standard deviation of the…

Q: The odds ratio is best used as a measure of effect size for frequency or nominal data. True False

A: The objective is to state whether the following statement is true or false.

Q: The length of a rod was measured eight times. The measurements in centimeters, in the order they…

A: a) By observing the above sample we can say that the measurements are not random samples because the…

Q: b. determine the mode of the distribution.

A:

Q: The measure of skewness for a certain distribution is 0.8. If the lower and upper quartiles are 44.1…

A: Solution:

Q: O c. They are an attempt to represent the underlying population distribution

A: Statistical populations tend to trace the empirical distribution:   statistical distribution -…

Q: Let's assume that your sample mean and sample standard deviation are the true population mean and…

A: We have given that Mean= µx̅ = µ = 2560Standard deviations (σx̅ ) =  634.60

Q: Decide if the statement is True or False. A sampling distribution of sample means has a standard…

A: The standard deviation of the sampling distribution of sample means is given by:

Q: Find the range and standard deviation of the set of data. 11, 10, 5, 12, 12 O

A: The detailed solution is as follows below:

Q: Find the standard error of the mean for each sampling situation (assuming a normal population).…

A:

Q: The predicted high temperature for a day in late May for a random sample of US cities are listed…

A: Given that:Data points [60.0, 73.0, 103.0, 67.0, 89.0, 76.0, 88.0, 86.0, 79.0, 72.0, 88.0, 87.0]…

Q: Given that the mean of a set of data is 40 and the standard deviation is 2, what is the coefficient…

A: Given,standard deviation(σ)=2mean(μ)=40

Q: the mean and standard deviation of a population are 200 and 20 respectively. suppose the sample size…

A: Given data,μ=200σ=20If n=36the mean of the sampling distribution=?

Q: Find the range and standard deviation of the set of data. 12, 8, 7, 11, 22 O

A: Given sample data is  12,8,7,11,22.

Q: Draw a cumulative frequency curve for the distribution below and use it to estimate the median.

A: Given: Experience Frequency 5-10 5 10-15 6 15-20 15 20-25 10 25-30 5 30-35 4 35-40…

Q: If you have a 99% confidence that a population proportion is in the interval from a to b, what does…

A:

Q: Find the range and standard deviation of the set of data. 6, 9, 6, 9, 9, 11, 13 O

A: Given - The set of data : 6, 9, 6, 9, 9, 11, 13 To find - Find the range and standard deviation of…

Q: A score below which a specific percentage of a distribution falls is referred to as the a) Mode b)…

A: Solution: Here, it is to find which definition belongs to a statement “a score below which a…

Q: Find the mean and standard deviation for the individualized instruction scores.

A:

Q: Given the data below, find the standard deviation 2,4,4,5,6,9

A: We need to compute the standard deviation of the data given below: 2,4,4,5,6,9

Q: a) Find the population standard deviation o. b) What is the required sample size if one wants the…

A: Here use MARGIN OF ERROR formula

Q: The mean number of travel days per year for salespeople employed by three hardware distributors…

A: Sample size: Sample is the part of the population that will help us to draw the inference about the…

Q: According to Chebyshev's theorem, what is the maximum proportion of data values from a data set that…

A: We know that the Chebychev's inequality states that the P(|X-μ|>kσ) < 1/k2 It can be seen as…

Q: Find the range and standard deviation of the set of data. 3, 7, 3, 7, 7, 10, 12 O

A:

Q: Is the statement below true or false? The distribution of the sample mean, x, will be normally dist…

A: The distribution of the sample​ mean,  x̄, will be normally distributed if the sample is obtained…

Q: Using the descriptive statistics above, find the sample variance.

A: Measure of central tendency measures the central or average value of a dataset. Measures of…

Q: We are going to calculate the standard deviation for the following set of sample data. 1) First,…

A:

Q: For the distribution (-1,0,1), what is the sample variance?

A:

Q: Find the range and standard deviation of the set of data. 10, 8, 6, 13, 23 O

A: we first calculate the range of our data range = maximum-minimum=23-6=17range =17Mean=μ=sum of all…

Q: Using the following set of data (the same as in the previous problem), find the sample standard…

A: Given data, 8, 7, 11, 10, 10, 8 sample standard deviation=?

Q: Use the standand normal distribution table to determine the percent of data less than z = 0.59.

A: from the normal distribution table For zscore= 0.59

Q: given the data distribution is aproximately normal with the minimum value of 25 and the maximum…

A:

Q: A local university administers a comprehensive examination to the recipients of a B.S. degree in…

A: In question,  Given that A local university administers a comprehensive examination to the…

Q: 300 high school students were asked how many hours.of TV they watch per day. The mean was 2 hours,…

A: Given that: Mean=2 Standard deviation=SD=σ= 0.5 Confidence level= 90% n=sample size=n=300   So…

Q: Find the range and standard deviation of the set of data. 5, 7, 5, 7, 7, 8, 10 O

A: Solution: The objective is to find range and standard deviation of the given set of data

Q: Please define the following statistical procedures: -what is an independent samples t-test -what…

A: Solution Statistical procedures  define below

Q: A random sample of 12 students showed the following time (in hours) of sleep 4.5 5 5.5 6 6 7 7.5 7.5…

A:

Q: Suppose that 150 values in a data set are normally distributed. Match the following questions with…

A:

Q: Find the range and standard deviation of the set of data. 11, 9, 7, 11, 12 e

A: Given data, 11,9,7,11,12   Range=? Sd=?

Q: Find the minimum sample size needed to estimate the true mean with margin of error of 6 and at…

A:

Q: For a given data set, the mean = 20, median = 20 and variance = 16. Then the shape of the…

A: A normal distribution is a probability distribution with the mean as μ and standard deviation as σ.…

Q: For a population that has a standard deviation of 22​, figure the standard deviation of the…

A: Population standard deviation = 22 We know that standard deviation of the distribution of means = σn

Q: What is the t statistics and the p value

A: Given ,      ∝ = 0.10 The mean is the sum of all values divided by the number of values : n is…

Q: Find the Mean, Median and Standard Deviation for the data. Round to two decimal places.…

A: The following data has been given: 10,7,9,3,8,15,5,5,12

Q: Find the range and standard deviation of the set of data. 4, 7, 4, 7, 7, 9, 11 O

A: The detailed solution is as follows below:

Q: Compute for the mean, the variance and standard deviation of this frequency distribution. Score…

A:

Q: Suppose you have a distribution with a mean equal to 100, median equal to 75, and mode equal to 50.…

A: Given that  Mean =100 Median =75 And Mode=50

Q: Find the mean, standard deviation, and relative standard deviation for the set of measurements (7,…

A: Mean: The mean value is calculated as follows: The sum of the observations is divided by the number…

Q: Assume that a sample is used to estimate a population proportion p. Find the margin of errors E that…

A: Given that the confidence level= 90% So, the significance level=α=1-0.90 = 0.10 So, α/2=0.10/2=0.05…

Q: The sample mean is the point estimator of O A. µ O B. p O C. X O D. o

A: Point estimator is the estimate of the population parameter.