# 25. A verage Wind Speeds A sample of 40 large cities was selected, and the average of the wind speeds was com- puted for each city over one year. Construct a frequency distribution, using 7 classes. 12.2 10.5 9.5 10.2 6.2 8.9 8.7 10.5 10.2 10.7 9.0 8.9 12.2 7.1 11.0 8.7 8.4 8.8 7.1 10.1 11.2 9.1 8.2 7.9 8.7 10.4 7.7 12.3 10.7 7.7 7.8 11.8 10.5 7.9 8.3 8.7 9.6 9.6 8.6 10.3

Q: Find the minimum sample size n needed to estimate muμ for the given values of c, sigmaσ, and E. c=...

A: The formula for the minimum sample size is as follows:

Q: Please answer the whole question (2) Let x be the age of a licensed driver in years. Let y be the p...

A: (a) Scatter diagram of the data:The scatter diagram for the given data that is obtained using EXCEL ...

Q: Conduct a test at the alphaα=0.10 level of significance by determining (a) the null and alternative...

A: a.Hypotheses:Here p1 and p2 be the two proportions. The aim is to check whether p1>p2. The null a...

Q: Let x be a random variable that represents hemoglobin count (HC) in grams per 100 milliliters of who...

A: (A)The sample mean and standard deviation is calculated below:

Q: a. Which of the six correlations above are statistically significant (i) if you test each correlatio...

A: We have been given alpha = 0.05 which implies that the probability of inferring that there is a cor...

Q: Why should researchers be very cautious about comparison or correlatios that involve different vaiab...

A: In general correlation does not imply causation. If there is strong correlation between two variable...

Q: a survey found that 21% of Americans watch fireworks on television on July 4. Find the mean, varian...

A: According to the given question, a survey found that 21% of Americans watch fireworks on television ...

Q: Listed below are the number of cricket chirps in 1 min and the corresponding temperatures in degrees...

A: In this question we have given the data about no. of chirps in 1 min and the corresponding temperatu...

Q: Use one of the following key terms to answer each of the following questions. KEY TERM BANK (separa...

A: Solution:Definition of Univariate data:When the data contains only one variable, it is called univar...

Q: If the probability for an event E is P(E)=0.4, then what are the odds against E?

A: Odds against an event:The odds against an event is given by the ratio of the probability of the even...

Q: Use software or a calculator to find the range, variance, and standard deviation of the following b...

A: As data of temperature is not provided here. Here i can show you how to find the range, standard dev...

Q: Find the mean, the median, the mode, and the midrange, the range, variance, standard deviation, 65th...

A: Hello there! According to our policies can answer one question . As there are multiple questions in ...

Q: Do larger universities tend to have more property crime? University crime statistics are affected by...

A: Part (a):The scatter diagram, along with the best fitted line (least-squares regression line) for th...

Q: Listed below are paired data consisting of amounts spent on advertising (in millions of dollars) and...

A: Let r denote the linear correlation between advertising cost (x) and profit (y). The hypotheses are ...

Q: Oxygen demand is a term biologists use to describe the oxygen needed by fish and other aquatic organ...

A: Let X be the random variable, defined as the oxygen demand.Here, X follows normal distribution with ...

Q: The claim is that the proportion of peas with yellow pods is equal to 0.25 (or 25%). The sample sta...

A: Sample proportion:It is given that out of 420 peas, 116 of them having yellow pods.The claim states ...

Q: If 25% of U.S. federal prison inmates are not U.S. citizens, find the probablity that 2 randomly sel...

A: Hello there! There are more than one question in the file shared. According to our policies cannot a...

Q: It is thought that basketball teams that make too many fouls in a game tend to lose the game even if...

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you. ...

Q: A politician recently made the claim that 47% of taxpayers from a certain region do not pay any inco...

A: The aim is to identify the null and alternative hypotheses for testing the claim.

Q: 2. Previously, you studied linear combinations of independent random variables. What happens if the ...

A: Consider the provided information:μx ≈ 7.34, σx ≈ 6.55, μy ≈ 13.19, σy ≈ 18.57, ...

Q: Cathy is planning to take the Certified Public Accountant Examination (CPA exam). Records kept by th...

A: Let X be the random variable defined as the number of times a person takes the CPA exam until the fi...

Q: Reasons for means and medians being good and misleading.

A: Solution:Definition of mean and median:Mean and median are the measures of central tendency.Arithmet...

Q: D, E

A: d.The null and alternative hypotheses are:

Q: Is the magnitude of an earthquake related to the depth below the surface at which the quake occurs? ...

A: Part (a):The scatter diagram, along with the best fitted line (least-squares regression line) for th...

Q: A raffle is being held to benefit the local animal shelter. They sell 832 tickets that do not win an...

A: Total number of tickets sold = 832+9+1 = 842Price of each ticket = $5Total income from 842 tickets =...

Q: Let x be the age in years of a licensed automobile driver. Let y be the percentage of all fatal acci...

A: Solution:(a) Draw a scatter diagram displaying the data.

Q: Directions: Draw the normal curve and shade the specific region show formulas A random same of 2...

A: Confidence interval:The (1-α) % confidence interval for proportion p is given by,

Q: In the EAI sampling problem, the population mean is $51,400 and the population standard deviation is...

A: It is provided that the population mean is $51400 and the population standard deviation is $4000.The...

Q: How do I solve this question with this table? obtain this sample using the portion of the random num...

A: By using random number table we can determine the random sampling with equal chance of occurrences o...

Q: A machine produces metal rods used in an automobile suspension system. A random sample of 15 rods is...

A: In this question We have the diameter of 15 metal rod, we have to find the 95% confidence interval f...

Q: Deborah wants to estimate the percentage of people who eat fast food at least once per week. She wan...

A: Margin of error is usually computed using the formula below. In this question, Margin of error is k...

Q: 10) Two cards are drawn from a standard deck of 52 cards and the first is not replaced before the se...

A: In this question, we have to draw two cards from a deck of 52 cards without replacement. Then we hav...

Q: See attachment for question.

A: Introduction to binomial distribution:Consider a random experiment involving n independent trials, s...

Q: Do most researchers still insist on at least interval level of measurement as a condition for the us...

A: Solution:In Interval scale, the difference between two values are standardized and equal. Most stati...

Q: A test consists of 940 true or false questions. If the student guesses on each question, what is th...

A: Given number of true or false questions = n = 940.Probability of correct answer p = 1/2Here we can s...

Q: Assume that we have two normal distributions both with means 0 and standard deviations σ1 and σ2. If...

A: We are given two normal distributions with mean = 0 and standard deviations σ1 and σ2.

Q: You are the foreman of the Bar-S cattle ranch in Colorado. A neighboring ranch has calves for sale, ...

A: According to the given question, x be the age of the calf (in weeks), and let y be the weight of the...

Q: Which statement regarding skewed distributions is FALSE? The "68-95-99" rule does not apply to skew...

A: The 68-95-99 rule is applicable only in normal distributions. So it is not applicable to skewed dist...

Q: A group of students decide to participate in a national strength test. Assume a normal distribution ...

A: Given mean number of students participated in national strength test = 580Standard deviation = 72.5T...

Q: you gave me this answer in last question, (copied below) but I see why I wasn't finding the correct ...

A: Note:Thank you for letting us know your doubt. We shall try our best to help you understand clearly ...

Q: In a standard normal distribution, what is the area under the graph for z>0? Explain.

A: Normal distribution:A random variable X is said to follow a normal distribution if the probability d...

Q: I asked this question before, and got an answer, but I have a question about the response that was g...

A: The formula that you shared from the text book is used for time-value-of-money calculations. Such a ...

Q: An economist is studying the job market in Denver area neighborhoods. Let x represent the total numb...

A: Scatter PlotIt is a Graph between two variables. It is plotted to check the relationship between the...

Q: please answer the whole question (3) Let x be per capita income in thousands of dollars. Let y be t...

A: Hi, since the problem posted by you contains multiple sub-parts, we are answering the first three su...

Q: Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as ...

A: Hello there! there are moe than three subparts in the question. According to our policies cannot ans...

Q: Suppose x has a normal distribution with mean μ = 28 and standard deviation σ = 7.Describe the distr...

A: Note:Hi there! Thank you for posting the question. Your question asks about the “distribution of x v...

Q: Suppose that you want to do statitical significance tests for fourcorrelations and you want your EWa...

A: According to the provided information, it is required to conduct statistical tests for four correlat...

Q: Hospitals typically require backup generators to provide electricity in the event of a power outage ...

A: Independent events:If A and B are two independent events, the probability of the event A and B can b...

Q: Determine whether or not sigma1 square is equal to sigma 2 square using a 5% significance level if w...

A: According to the given question, to test the hypothesis of H0: sigma 1 square is equal to sigma 2 s...

Q: A simple random sample of n=23 professors at a local community college have a mean course evaluation...

A: Solution:Null and alternative hypotheses:Null hypothesis: µ = 4Alternative hypothesis: µ ≠ 4Test sta...

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 2 images