What is the standard deviation  of the sampling distribution for the proportion of "e"s contained in the random samples of 196 letters? The answer should be expressed as a decimal and not as a percent. Round its value to the nearest thousandth (three decimal places).

Q: A marketing researcher for a phone company surveys 70 people and finds that the proportion of…

A: Solution: a. From the given information, the proportion of customers who are likely to switch…

Q: The ages (in years) of a random sample of shoppers at a gaming store are given below: 12 2 23 15 20…

A: Let us define X as the given observations. X: 12, 21, 23, 15, 20, 16, 19, 17, 14, 16. Consider,…

Q: Find the standard deviation of the given data rounded to the nearest hundredth. 3, 4, 5, 7, 10, 12,…

A: Given data is3,4,5,7,10,12,15sample size(n)=7

Q: In any symmetrical distribution, what percentile would be associated with the mean value? What…

A: For a symmetric distribution, often the mean, median, and mode all occur at the same point.…

Q: Given a uniform distribution with endpoints 4 and 22: What is the mean?        What is the…

A:

Q: What is the standard deviation on the graph ?

A:

Q: If you have 100 people in your sample, what would be the degrees of freedom you use to calculate the…

A: Given, n=100 Degree of freedom(df)=?

Q: Find the standard deviation of the sampling distribution of sample means using the given…

A: According to the given information in this question We need to find the value of standard deviation…

Q: In a symmetric distribution with HH = 48 and standard deviation o = 3 Approximately what percent of…

A:

Q: 95% of 80 freshman history students scored between 70% and 80% on a take home quiz. If this data is…

A: Given,  n=80 α= (1-0.95) =0.05 Let X denote the score of freshmen. As per t-distribution table, the…

Q: A coin is tossed 16 times, and the number of heads is counted. What is the standard deviation for…

A: Given that,Sample size (n) = 16

Q: A recent study shows that out of 5, 000 people who moved to Arizona, 2, 350 did so to take a new…

A: From the given information, sample size n = 1000. Total number of people moved n(S) = 5000. Number…

Q: The mean of a population (μ) is 120 and the standard deviation is 20.  What is the mean of the…

A: From the provided information, Mean (µ) = 120 Standard deviation (σ) = 20

Q: In a distribution exactly normal, 7% of the items are under 35 and 89% are under 63. What are the…

A:

Q: Find the standard deviation of the sampling distribution of sample means using the given…

A:

Q: What is the standard deviation for the following sample of scores? Scores: 3,2,4,6,6,3

A: The standard deviation is a measure of dispersion. It tells how much data are deviates from their…

Q: Given a distribution with a mean of 90 and a standard deviation of 10, what is the probability of…

A: Given Information: μ=90 σ=10 x1=85 x2=110

Q: Suppose that the average length of American songs is 245 seconds with a standard deviation of 28…

A: Solution: Let X be the length of American songs. From the given information, X has mean µ=245…

Q: What is the sum of the deviation scores for the data in the frequency distribution table below?

A: Sum of deviation  of scores from mean is always zero.

Q: In a symmetric bell-shaped distribution, about what percent of ? values lie between the first and…

A: According to the empirical rule, in a symmetric bell shaped distribution about 68.3% of the values…

Q: Find the standard deviation for the number of girls in groups of 14 births when p = 0.5

A: Binomial probability distribution is a type of discrete probability distribution.

Q: The mean and standard deviation of the sampling distribution of the mean is shown as?

A:

Q: What is the standard deviation of the number of heads given 100 coins flips? Round to two places.

A: Given: 100 coins are flipped So sample size, n=100

Q: The average number of acres burned by forest and range fires in a large New Mexico county is 4,300…

A: GivenMean(μ)=4300standard deviation(σ)=750

Q: 2. How is the sample size related to the deviation?

A: We have to define how sample size is related standard deviation

Q: The number of regular season wins for 10 college football teams in a given season are given below:…

A: x x2 2 4 10 100 15 225 5 25 13 169 10 100 15 225 9 81 7 49 4 16     ∑x=90…

Q: (a.) Find the point estimate for the mean and standard deviation of the salaries of all the…

A: NOTE-AS PER POLICY I HAVE CALCULATED FIRST MAIN QUESTION ONLY  Now  Here Given the salary of 12…

Q: 9) In a class of 30 students, how many students failed the test (below 64), if the mean grade on a…

A:

Q: For a random sample of 40 students, the average statistics midterm score is 73 points (out of a…

A: The sample size is 40, average statistics midterm score is 73 points, and standard deviation is 7.3.

Q: The mean height of Grade 11 students at a certain University is 150 cm and the standard deviation is…

A: Given that: Mean height: μ=150 cm Standard deviation: σ=12 cm Number of students: n=11 a. greater…

Q: Assume the sample standard deviation is s=10, what do you conclude?

A: here given, sample mean = 87 n = 25 sample standard deviation  = 10

Q: The wind speeds throughout the month of April were normally distributed with a mean of 17 mph and a…

A: We have given that  X~N(mu,sigma ^2) mu=17,sigma =4 Z-socre =(x-mu)/sigma

Q: he History test had a national mean of µ = 52 and a standard deviation of  σ= 9. How much sampling…

A: Given data, µ = 52  σ= 9 n=27 sampling error=?

Q: The percent fo Coloradans that own a Subaru is 56%. If you were to take a random sample of size 70,…

A: We have given that,  Let X be the random variable from binomial distribution with probability (p) =…

Q: In a normal distribution, 31% of the items are under 45 and 8% are over 64. Find the mean and the…

A: Given Data: Let X represent the variable P(x<45)=0.31 P(x>64)=0.08   X~ Normal μ, σ2   To…

Q: For a random sample of 10 men, the mean head circumference is x-bar= 57.3 cm and the sample standard…

A:

Q: In a certain distribution of numbers, the mean is 40 with a standard deviation of 5. Atleast what…

A: Given data: Mean = 40 standard deviation = 5. To find: Atleast what fraction of the numbers are…

Q: For a sample of 120 businesses, the average profit they generate in a month is $54,000 with a…

A:

Q: If you want to be 95​% confident of estimating the population mean to within a sampling error of ±20…

A: Given information- Population standard deviation, σ = 100 Confidence interval = 0.95 Significance…

Q: Given an approximately normal distribution with a mean of 175 and a standard deviation of 37,…

A: Given info: Here, mean is 175 and standard deviation is 37.

Q: In a normal distribution, if the mean is ten and the standard deviation is one, what would the…

A:

Q: What percent of the distribution is included within 1.75 standard deviation? *

A: here use chebyshev's theorem for given problem

Q: Compute the standard deviation of the sampled proportions if p=.8 and n=50. Round to three places.

A: Given,n=50p=0.8

Q: Find the mean, variance, and standard deviation for the number of heads when 20 coins are tossed.…

A: Let n be the number of coins tossed = 20 Let p be the probability of getting head = 0.5 Let X denote…

Q: Find the standard deviation of the sampling distribution of sample means using the given…

A: According to the given information in this question We need to find the value of standard deviation…

Q: Find the Mean and Standard Deviation for the prompts below: 5.)  A survey found that 86% of…

A: 5. Given: p=0.86n=121-p=0.14 The probability that 10 or more would have never been the victim of a…

Q: For a random sample of 10 men, the mean head circumferences are x-bar = 57.3 cm, and the sample…

A: Given data:   The given sample size is n=10. The given mean head circumference is x=57.3 cm. The…

Q: The ages of the employees at Solar Systems, Inc. is normally distributed with a mean of 32.7 years…

A: Let X=ages of the employees at Solar Systems, Inc. Given that X follows normal distribution with…

Q: In a distribution with a mean of 80 and a standard deviation of 8, what percentage of number would…

A: a. The mean is 80, and standard deviation is 8. The percentage of number would be less than 64 or…