The lengths of pregnancies in a small rural village are normally distributed with a mean of 260 days and a standard deviation of 15 days. In what range would you expect to find the middle 95% of most pregnancies? Round each answer to the nearest day. If you were to draw samples of size 52 from this population, in what range would you expect to find the middle 95% of most averages for the lengths of pregnancies in the sample?

Q: Americans spend an average of 5 hours per day online. If the standard deviation is 33 minutes, find…

A: Given,Mean, μ = 5 hours = 5×60 = 300 minutes.Standard deviation, σ = 33 minutes.We need to find the…

Q: The time for degree completion was record below. Years 4 6 5 6 5 8 Calculate the standard…

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Q: Given a set of data that is skewed-left, there is at least _____ % of the data within 3 standard…

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Q: Find the standard deviation of the lengths of the wolves in the entire animal preserve.

A: The mean of the lengths of the wolves in the entire animal preserve is,…

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

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Q: The size of the sampling error is Select one: a.Inversely related to the sample size, i.e., the…

A: We have to find correct statement.

Q: Seventy-six percent of Americans favor spending government money to develop alternative sources of…

A: Given that  p = 75%    and.   n = 140 By using the Binomial distribution

Q: ssume that the readings on the thermometers are normally distributed with a mean of 0° and standard…

A: Given that  Assume the readings on the thermometer is normally distributed . Mean  = 0 degree…

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: It is given that mean amount of food is 12 oz and number of dogs is 16. The sum of squared…

Q: Pam is planning to take a SAT Prep course. She asks 7 of her older sister's friends who used a prep…

A:

Q: If the grades are normally distributed and 8 students received a B, how many students took the…

A: Let C denote the grades of students. Given that X follows N(mean = 82, SD = 5), then  Z = (X -…

Q: At the end of the semester a professor wants to organize student’s grades by how many students…

A: Given data, At the end of the semester a professor wants to organize student’s grades by how many…

Q: Calculate the sample standard deviation for this data set: 65, 48, 70. The formula for the sample…

A:

Q: Find the standard deviation for the population data set. You must clearly show your work with…

A: Given data 2, 5, 9, 11, 13 Mean,  x = ∑i xin= 2+5+9+11+135 = 8 xi (xi-x¯) (xi-x¯)2 2 -6 36 5…

Q: In my homework assignment, I have a concern about standard deviation do I have to round it to two…

A: Rounding-off must always be done as per the instruction in the  question. In the absence of an…

Q: The number of hours worked each week by a teacher over the past two months are: 49 53 38 49 16 43…

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Q: ould have the right to marry. (The 2014 data were collected before the 2015 US upreme Court decision…

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Q: You are curious about how the mean age of cars compared for students and faculty. You take a random…

A:

Q: This population has a mean of 50. If we took an infinite number of samples and got the mean of each…

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Q: Use either your graphing calculator or Table A.2. Round to 4 decimal places if necessary. The birth…

A: Given: Population mean μ=7.46 Population standard deviation σ=1.8 Consider X be the random variable…

Q: A data set has five values. The 45th and the 55th percentile are both 25. The largest value is 125,…

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Q: Test stat: p value: Construct a confidence interval suitable for testing the claim that the two…

A:

Q: Use the sample mean(78.5)and sample standard deviation (12.3671)in your calculations below. Use…

A: Given information:

Q: We are asked to find the values that separate the middle 60% of the population from the top and…

A: In a normal distribution, the z-score is a measure of how many standard deviations an element is…

Q: A medical lab tested a sample of 8 vials of blood for acidity on the pH scale.  Use this data to…

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Q: The manager of a department store wants to estimate the average amount of money a customer will…

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Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…

A: Given that, Mean = 72 Standard deviation = 7

Q: A student takes a multiple-choice test that has 6 questions. Each question has four choices. student…

A: It is given that,  A student takes a multiple-choice test that has 6 questions i.e. n=6 Each…

Q: Twenty-six car salespeople were sampled to see how many cars they sold in a month; the following…

A: 19, 27, 27, 14, 23, 17, 32, 11, 27, 31, 22, 33, 28, 26, 31, 25, 23, 31, 26, 36, 24, 28, 12, 28, 25,…

Q: Place the following in order to show how you find the standard deviation. Take the square root of…

A:

Q: Given the spot speed of 20 vehicles on a certain traffic section. Use 8 classes. Determine: a. The…

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Q: 3. Listed below are the number of major injuries each year. The number listed are from year…

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Q: C2. GSS 2014 and GSS 2018 respondents were asked their opinion on whether homosexuals should have…

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Q: What would a histogram look like if the mean is 50 the median is 50 and the standard deviation is…

A: Mean is 50.Median is 50.Standard deviation is 1.6.

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A:

Q: A statistics professor surveys all 100 of the students in an introductory statistics lecture. The…

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Q: in 2020, a sample of 12 monarchs had an average wingspan of 6.3 cm. this year a new sample of 12 had…

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Q: Mark went around the neighborhood collecting spare change for charity. The 7 families gave: $5.00 ,…

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Q: If the mean of a data set is 22 and the SD is 5, what % of the values fall between 12 and 27? Give a…

A: given that  mean of a data set is 22

Q: Four of your classmates measured the diagonal length of the blackboard. Classmate A measured it as…

A:

Q: A student studying statistics wants to look at data for his favorite sport, American football. He…

A: It is given that that a student collect data on the lengths of 100 field goals from various games…

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.