How is normal distribution can be misused in a airline company?
Q: Fifty five percent of the students in a class of 135 of planning to go to graduate school, Find…
A: Answer: From the given data, Fifty five percent of the students are planning to go to graduate…
Q: In simple regression, the percentage of variance in Y that can be explained by X is identified by
A: We know that, in any regression model, we need to measure the model accuracy i.e. we need to check…
Q: Battery life is an important issue for many smartphone owners. Public health studies have examined…
A: From the provided information, The data values are as follow: Primary use: Talking 35.8 22.2 24.0…
Q: All malls start limiting the number of visitors and visiting time. One of the marketing directors of…
A: Provided data is, one of the marketing directors of a large department store wanted estimates the…
Q: A researcher believes that among the type A blood, 10% have type B blood a residents and finds that…
A: Given, A researcher believes that among the residents of a remote community, 30% have type O blood,…
Q: Deep Water Financial of Duluth, Minnesota, has asked you to evaluate the stock price growth for a…
A: Deep Water Financial of Duluth, Minnesota, has asked you to evaluate the stock price growth for a…
Q: What is the impact of independent variables (income, types of degrees, quality of education) on…
A: Consider the independent variable Income: There exists a positive relation between income and…
Q: How would I identify the patterns described in the article, Is Cyber-Terrorism the New Normal?
A: …
Q: Why is it not enough to compare averages to judge whether Treatment 1 and Treatment 2 produced…
A: The objective is to find the all options that are true.
Q: To obtain a maximum amount of variance, an item ought to have a degree of difficulty of what?
A: To obtain a maximum amount of variance an item ought to have a degree of difficulty is the number of…
Q: 2) If all of the values in a set of data were doubled, what would happen to the variance?
A: We need to use the concept of variance.
Q: Is there evidence of a difference in the variability of the computer anxiety experienced by males…
A:
Q: A researcher believes that among the residents of a remote community, 10% have type O blood, 10%…
A:
Q: The owner of Cruz Wedding Photography believes that the average number of wedding bookings per year…
A: When the intervention of random variables is present, Monte Carlo simulation is a model used to…
Q: Explain the term variability (this is not asking for a definition).
A: Here we want to explain Variability.
Q: Suppose that 39% of all patrons at Goldy's gym spend more than 10 hours a week at the gym. Goldy's…
A: Given that n=60 , p=39%=0.39 , q=1-p=1-0.39=0.61 X~Binomial(n=60 , p=0.39) P=Probability Goldy's…
Q: You are doing a one way analysis of variance on the fuel consumption of different makes of cars. You…
A: Suppose we are doing one-way analysis on the fuel consumption of different makes of cars. The total…
Q: Could you please teel me why should a firm, for profit, care not only about the expected profit, but…
A: Given that Could you please teel me why should a firm, for profit, care not only about the…
Q: A researcher wishes to test if the variance of scores on a particular exam is the same for college…
A: The given hypothesis is H0:σA2σB2=1 Versus Ha:σA2σB2≠1
Q: The weight of 2 month old babies is normally distributed with a mean of 12 pounds and a variance of…
A: From the given information, μ=12σ=9 a. The required percentage of weight more than Tina's weight…
Q: he issue/scenario: A bio-tech firm has provided you with 1 years’ worth of sales for a sample of 45…
A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…
Q: The issue/scenario: A bio-tech firm has provided you with 1 years’ worth of sales for a sample of 45…
A: From the given information, there are two groups in Engineer category, 'No' and 'Yes'. The…
Q: Identify the distribution of the standardized version of a normally distributed variable.
A: The distribution of the standardized version of a normally distributed variable have the mean 0 and…
Q: The owner of a chain of mini-markets has two stores, Store 1 and Store 2, in one city. She recently…
A: a)Consider is the population mean value of the differences of the sales of stores 1 and 2.That is,…
Q: The systolic blood pressure of individuals is thought to be related to both age and weight. Let the…
A: Given:
Q: A researcher believes that among the residents of a remote community, 30% have type O blood, 50%…
A: Given Sample size, n=80 Type O blood = 30% Type A blood = 50% Type B blood = 10% Type AB blood = 10%…
Q: A particular moth can infest avocado trees and potentially damage the avocado fruit. A farmer plans…
A: Given, mean μ= 59 standard deviation = 24.
Q: There are two groups of policyholders for an insurance company: Group A and Group B. For Group A,…
A: Given data group A : group B : μA = 140σ2A = 400…
Q: The Golden Comet is a hybrid chicken that is prized for its high egg production rate and g…
A: The sample size of old hens is The sample mean rate of egg production is eggs/day. The population…
Q: An analysis is performed on vacant land parcels in the city of Thunder Bay to find out whether or…
A: “Since you have asked multiple question, we will solve the first question for you. If you want any…
How is
Introduction
The normal distribution is a continuous prob. dist.
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- Salaries for administrative assistants range from $32,000 per year to $67,000 per year. Salaries for executive chefs range from $58,000 per year to $110,000 per year. Which of these two professions has the largest amount of variation? If the variability is high, what does this mean in terms of getting a salary on the higher end of the range?Miss America winners from the 1920's and 1930's had a average BMI of 19.4. A sample of recent winners had reported BMIs of 18.7, 18.7, 18.5, 19.2, 19.3, 18.7, 18.6, 19.8, 19, 19.6, and 19 . Do recent winners appear to be significantly different from those in the 1920s and 1930s? (assume normality). Show all the steps of a hypothesis.The mean age of children at the X College daycare center is 6. The ages are skewed in a negative direction by a large number of 3 and 4 year old students. The variance of ages is 5.1. At least 66% of the children will be between what two ages?
- A counseling psychologist sets out to look at the role of having children in relationship longevity. She decides to measure marital satisfaction in a group of couples with children and a group of childless couples. She chooses the Marital Satisfaction Inventory, because it refers to "partner" and "relationship" rather than "spouse" and "marriage," which makes it useful for research with both traditional and nontraditional couples. Higher scores on the Marital Satisfaction Inventory indicate greater satisfaction. Assume that these scores are normally distributed. A sample of 39 couples with children scored an average of 51.1 with a sample standard deviation of 9.2 on the Marital Satisfaction Inventory. A sample of 31 childless couples scored an average of 45.2 with a sample standard deviation of 12.1. Suppose you intend to conduct a hypothesis test on the difference in population means. In preparation, you call the sample of couples with children sample 1 and the sample of childless…The Federal Bureau of Investigation (FBI) compiles data on crimes and crime rates and publishes the information in Crime in the United States. A violent crime is classified by the FBI as murder, forcible rape, robbery, or aggravated assault. The first two columns of Data set 1 give a relative-frequency distribution for (reported) violent crimes in the year 2010. A random sample of 500 violent-crime reports from last year yielded the frequency distribution shown in the first and third columns of Data set 1. At the 5% significance level, do the data provide sufficient evidence to conclude that last year's violent-crime distribution is different from the 2010 distribution? Use this information to answer the question. Click here to view the StatCrunch report. The value of the p-value is . Since the p-value distribution. (Round to four decimal places as needed.) α, we and determine that there sufficient evidence to conclude that last year's violent-crime distribution is different from the…he Princeton Review, a company that tracks information about various colleges, reports that 30% of CofC students are out-of-state students. If we took many samples of CofC students, and for each sample calculate the proportion $\hat{p}$ of out-of-state students in that sample, what would be the center of this distribution?
- Dr. Watts is a pediatrician. His group did some research on the sleep habits of children less than 24 months old. They found a weak negative correlation between a child’s age and the number of hours per day he or she slept. What does this mean? As a child’s age increases, the hours of sleep decreases in a nearly perfect pattern. As a child’s age increases, the hours of sleep increases in a nearly perfect pattern. As a child’s age increases, the hours of sleep decreases but the relationship is not perfect. As a child’s age increases, the hours of sleep increases but the relationship is not perfect.Suppose researchers at an abdominal transplant clinic are concerned about the rate of graft loss due to diabetes status prior to receiving a donor kidney. Research has shown that gender discordance, or receiving a gender from a donor of an opposite gender may increase the risk of both exposure and outcome after transplant. Assume the following tables represent the stratified analysis of the potential confounding variable. (9 points) Gender Discordance Graft Failure No Graft Failure Total Diabetes II 23 10 33 No Diabetes II 4 44 48 Total 27 54 81 Gender Concordance Graft Failure No Graft Failure Total Diabetes II 9 34 43 No Diabetes II 12 87 99 Total 21 121 142 A) Calculate the stratum specific estimates for the odds ratios in each strata. B) Observe the difference in the odds ratios. Based on observation alone, what are we likely to conclude regarding the relationship between outcome and exposure…Your state is going to vote on becoming a "right to work" state in the next, and you wonder if there is there a relationship between salary levels and unionization. You find data on salary from the U.S. Census, which is split into three groups: Low; Moderate/About Average, and; High. To see if salary, measured in this way, is associated with unionization you find a variable in the same dataset called "UNION", which has two categories: the respondent has a unionized job and the respondent does not have a unionized job. Because you want to know if you should favor or oppose becoming a "right to work" state, you test these two variables to see if there is an association between salary level and unionized labor. What type of hypothesis test is most appropriate?
- A researcher believes that among the residents of a remote community, 30% have type O blood, 50% have type A blood, 10% have type B blood and 10% have type AB blood. She takes a random sample of 80 residents and finds that 20 had type O blood, 40 had type A blood, 12 had type B blood and 8 had type AB blood. Do the data follow the hypothesized distribution of blood type for this community? Test at a = .05. Round your answers to three decimal places, if necessary. Null hypothesis: Ho: Po = 0.3, PA = 0.5, PB = 0.1, PAB = 0.1 20 40 12 8 80 80 80 80 1 1 1 20 40 8 Ho: Po = Ho: Po = Alternative hypothesis: Ho: Po = PA = PB = PAB = Ha: po # Type O 1 Ha: Po PA PB = PAB = 4 20 › PA = PA = Type 0 20 24 40 80 80 Ha: Po 0.3, PA # 0.5, PB At least one of the proportions is different. Complete the table of observed counts: Type O , PA # 0.667 Type A PB = PB = 40 Type A 40 What is the test statistic? 2.667 1 ,PB # 0 , PAB = 1 12¹ PAB Complete the table of expected counts under the null hypothesis: 12…It is possible to have a variance of 625,000625,000 for some data set. true or falseA researcher collected data from a sample of correctional officers and found that, on average, they made 47,173 dollars a year with S=6,364. Assuming that their salaries were normally distributed what proportion of correctional officers make less than 40,000 dollars a year?
