According to CDC, among men aged 20-39 obesity is 40.5%--? = 0.405. You take repeated samples of size ? = 650 from the population of men in this age group. 16 The fraction of proportion of men in these samples who are obese which fall between 0.37 and 0.44 is, a 0.8236 b 0.8579 c 0.8937 d 0.9309
Q: 112 3. How does freedom to organize your work depend on level of education? 6.28 Animal testing. "It...
A: Chi-square analysis is a non-parametric statistical test that compares the differences between the o...
Q: 1. Calculate the expected value of the consumption prize in each lottery. 2. Calculate the variance ...
A: HERE prepare table for each lottery Consider two lotteries. Lottery A is such that an individual rec...
Q: A recent survey shows that 60% of families regularly schedule family vacations for the month of Apri...
A: Given, 60% of families regularly schedule family vacations for the month of April. Let X = number of...
Q: A box of chocolates contains seven milk chocolates and eight dark chocolates. You randomly pick a ch...
A: It is given that Number of milk chocolates = 7 Number of dark chocolates = 8 Total chocolates = 15 N...
Q: The following set of data is from a sample of sample n=6 7 4 9 7 3 12 a. Compu...
A: Given data is 7,4,9,7,3,12
Q: Table 5. Resolution 3545's Effects on Rural Credit Concessions. (1) (2) (3) (4) -0.346 Resolution 35...
A: In the given output, the dependent variable is a normalized number of rural credit concessions at th...
Q: Question: A, B and C are bidding for a contract. It is believed that A has exactly half the chance t...
A: Given: A has exactly half the chance that B has to win B has chance 4/5 of C
Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you be...
A: We have given that, Population proportion (p)= 29% = 0.29 and margin of error (E) = 2.5 = 0.025 and...
Q: Let u; be the residuals in the lease square fit of Y; against X;, (i = 1,2, ... ,n) and a constant. ...
A:
Q: For the data given below, calculate the index number by taking (i) 1980 as the base year (ii) 1987 a...
A:
Q: For the questions below, answer "cannot do" if the distribution is not normal. a) The distribution ...
A: a. i) Define a random variable X, that is the temperature of January.
Q: Are the sample distributions symmetrical? Explain Some statistics books define an outlier in a data ...
A: Given:
Q: In a local archery contest, the probability that Samuel will be successful on each shot is 82.5% If ...
A: Let X be the random variable from binomial distribution with probability of success (p) = 82.5% = 0....
Q: Calculate the variance of an ordinary Brownian Motion.
A:
Q: 3Nlustration 56. Calculate the median from the following data, if the mean value is 45. Marks No. of...
A:
Q: In a certain examination, the average grade of all students in class A is 68.4 and that of all stude...
A:
Q: The file contains the amount that a sample of nine customers spent for lunch ($) at a fast-food rest...
A: Observation: XX X^2X2 1 4.20 17.64 2 5.03 25.3009 3 5.86 34.3396 4 6.45 41.6025 5 7.38 54....
Q: Newborn Weights (One-Week Sample) Baby No. Weight (pounds) 1 8.04 2 6.86 3 7.96 4 6.59 5 10.65 6 5.5...
A: The histogram is used to examine the distribution of quantitative variables via graphical representa...
Q: From the data given below, find: (a) the two regression equations. (b) the coefficient of correlatio...
A:
Q: P(A) = 0.6 P(B) = 0.5 P(A|B) = 0.42 P(A) = 0.3 P(B) = 0.5 P(A|B) = 0.3 P(A) = 0.45 P(B) = 0.75 P(A a...
A: Determine if events A and B are independent for given problems
Q: The file contains the amount that a sample of nine customers spent for lunch ($) at a fast-food rest...
A:
Q: Generalisation. The mathematical expectation of the product of a number of independent random variab...
A:
Q: Given the following probability distribution, calculate the variance x P(x) 1 0.123 2 0.238 3 0.542...
A:
Q: 1. Three Hundred digits were chosen at random from a set of tables. The frequencies of the digits we...
A: Hypothesis, H0: The digits were distributed in equal number in the table. H1: The digits were not d...
Q: The following histogram shows the distribution of 1000 sample observations from a population with a ...
A: Given μ=4σ2=8
Q: An aptitude test for selecting officers in a bank was conducted on 1,000 candidates, the average sco...
A:
Q: was the mean for the original sample? (SHOW YOUR WORK)
A:
Q: A. The reaction times of a subject to a stimulus are strongly skewed to the right because of a few s...
A:
Q: BIrth weights of babies born to full-term pregnancies follow roughly a normal distribution. At Meado...
A: From the provided information, Mean (µ) = 7 pounds Standard deviation (σ) = 14 ounces Since 1 ounce ...
Q: P(x) 0.2 1 0.3 2 0.05 3 0.45 Find the mean of this probability distribution. Round your answer to on...
A: Given data is x P(x) 0 0.2 1 0.3 2 0.05 3 0.45
Q: . Calculate (a) R, 23, (b) R, 12 and (c) R,1, for the following data: X, = 6.8 S, = 1.0 "12 3.12 2.1...
A:
Q: Data X Data Y Data Z 25 25 25 Time left 0:4- 20 20 20 15 15 10 10 10 5 5 5 1 2 3 4 5 6 7 8 9 10 1 2 ...
A: The standard deviations and median are to be inferred from the plotted graphs, through visual inspec...
Q: An urban geographer is interested in determining whether a statistically significant relationship ex...
A: Given information: Given data represents the values of the variables PSE(%) and Av Income($000).
Q: A fish biologist hypothesizes that the proportion of fish in Lake Ontario that are Black Carp has in...
A:
Q: Determine the amount to be paid in full settlement of each of two invoices, (a) and (b), assuming th...
A: Solution a: Amount to be paid = Merchandise price - Returns an allowances - discount + Freight In = ...
Q: Dice Rolls: If you roll a pair of fair dice, what is the probability of each of the following? (roun...
A:
Q: If it costs a dollar to draw one number of a sample, how much would it cost in sampling from a unive...
A:
Q: If the events A and B are independent, the events A and B (and similarly A and B) are also independe...
A:
Q: A bag contains 6 white and 4 black balls and a second one 4 white and 8 black balls. Onc of the bags...
A:
Q: Standardized measures seem to indicate that the aver- age level of anxiety has increased gradually o...
A: Given that - µ = 15.1 M = 23.3 n = 16 SS = 240
Q: Suppose that the rate of return for a particular stock during the past two years was 20% and 30%. a...
A:
Q: In a frequency distribution, the co-efficient of skewness based on quartiles is 0.5. If the sum of t...
A: In a frequency distribution, the co-efficient of skewness based on quartiles is 0.5. If the sum of t...
Q: Obtain the median for the following frequency distribu- tion : 1 2 3 4 5 6 7 8 9 x: f: 8 10 11 16 20...
A: X Frequency 1 8 2 10 3 11 4 16 5 20 6 25 7 15 8 9 9 6
Q: Compute the standard deviation
A: The file contains the amount that a sample of nine customers spent for lunch ($) at a fast-food rest...
Q: In a frequency distribution, the co-efficient of skewness based on quartiles is 0.5. If the sum of t...
A:
Q: Average weight of males in the age bracket of 20-39 is 198.5 pounds. Assume population standard dev...
A:
Q: The histogram below gives the length of service of members of the Department of Mathematics and Stat...
A:
Q: If (X. Y) is a two-dimensional RV uniformly distributed over the triangular region R bounded by y = ...
A:
Q: (a) How many committees can be formed? (b) How many committees can be formed with at least 2 men? (c...
A: here total 8 men and 7 women that is 15 employees in office committee of 4 member has to be formed i...
Q: Expand the following summation notation and vice versa. X12+ X13+ X4+ x;5 1. 2 2. Σ(Χ-Y) |
A:
According to CDC, among men aged 20-39 obesity is 40.5%--? = 0.405. | |
You take repeated samples of size ? = 650 from the population of men in this age group. |
16 | The fraction of proportion of men in these samples who are obese which fall between 0.37 and 0.44 is, |
a | 0.8236 |
b | 0.8579 |
c | 0.8937 |
d | 0.9309 |
Step by step
Solved in 2 steps
- An article was published concerning the incidence of cardiac death attributable to earthquake in Los Angeles County on January 17, 1994. In the week before the earthquake there were an average of 15.6 cardiac deaths per day in Los Angeles County. On the day of the earthquake, there were 51 cardiac deaths. Among days with more than 10 admissions, what proportion fall on weekends?In 2007, the CDC reported that approximately 6.6 per 1000 (0.66%) children were affected with autism spectrum disorder. A sample of 900 children from Boston are tested, and 7 are diagnosed with autism spectrum disorder. Is the proportion of children affected with autism spectrum disorder higher in Boston as compared to the national estimate? Run the appropriate test at a 5% level of significance.A 2016 Pew Research poll found that 18% of cell phone owners use their phone for conducting transactions with their bank. Let’s assume that 0.18 is the true proportion (in 2016) of all cell phone owners who use their cell phone for banking. (a) You take a random sample of 150 current cell phone owners and find that 38 of them use their cell phone for banking. Is this convincing evidence that since 2016 there has been an increase from 0.18 in the proportion of cell phone owners who use their cell phone for banking? Use = 0.05. (b) Suppose the question you asked the people in your sample was, “People on the go use their cell phone for everything. Do you ever use yours to conduct your banking business?” Comment on the potential bias arising from the way this question was asked and its’ impact on your conclusion.
- After reading an article using research done by the Organization for Economic Co-operation and Development (OECD) based in France, a statistics student decided to conduct his own study to see if the figures in the article were accurate. This article stated that 37% of email users said spam has increased in their personal email accounts and 29% said it has increased in their work email accounts. To test the first figure, let p be the proportion of email users who feel that spam has increased in their personal email. The first set of hypotheses that the student wants to test is then: Ho: p = 0.37 Ha: p ≠ 0.37 Based upon the data collected by this student, a 95% confidence interval for p was found to be: (0.25, 0.32). At the 0.05 level of significance, which conclusion can be made? a. The student cannot reject Ho, since 0.37 does not fall within the limits of the interval. b. The student can reject Ho, since 0.37 falls within the limits of the interval.…A Chinese cell-phone manufacturer exclusively uses robots in one of its factories. A random test run results in 23 defective assemblies out of 500. Does this data suggest that the true percentage of defectives is less than 5%? Use NATDRC.Each year, over 2 million people in the United States become infected with bacteria that are resistant to antibiotics. In particular, the Centers of Disease Control and Prevention has launched studies of drug-resistant gonorrhea (CDC.gov website). Of 142 cases tested in Alabama, 9 were found to be drug-resistant. Of 268 cases tested in Texas, 5 were found to be drug-resistant. Do these data suggest a statistically significant difference between the proportions of drug-resistant cases in the two states? Use a 0.02 level of significance. What is the p-value, and what is your conclusion?
- According to shopper data, 97% of households purchase toilet paper. An analyst believes this is too low. To investigate, the analyst selects a random sample of 500 households and finds that 98% of them purchase toilet paper. Do these data provide convincing statistical evidence at the α = 0.05 level to conclude that the true proportion of all households that purchase toilet paper differs from 0.97?. It has been found that 85.6% of all enrolled college and university students in the United States are undergraduates. A random sample of 500 enrolled college students in a particular state revealed that 420 of them were undergraduates. Is there sufficient evidence to conclude that the proportion differs from the national percentage? Use a = 0.05.Suppose 4 percent of the children in the US are thought to be near the juvenile diabetes threshold. A school district sample 70 students for such attribute at random. If the population of the school district is 11000 students, Does a normal model seem appropriate to model the sample proportion in this context?
- In random samples of 900 men and 400 women it is found that 99 men and 36 women suffer from kidney stones. Is there statistical evidence that the proportion of male kidney stone sufferers is greater than the proportion of female kidney stone sufferers? Use 5% significant level.A marketing manager for a cell phone company claims that more than 35% of children aged 10-11 have cell phones. In a 2009 survey of 5000 children aged 10-11 by Medimark Research and Intelligence, 1805 of them had cell phones. Do the sample data provide sufficient evidence to conclude that the proportion of children aged 10-11 that have cell phones is greater than .35? Use alph=.05A researcher wants to calculate the prevalence of Alzheimer’s among members of a specific community who are 65 years of age and older. The researcher needs to know how many individuals who are 65 years of age or older need to be recruited for the study to ensure the estimated prevalence will be within 1.0% of the true proportion. Calculate the sample size needed by the researcher if a national study has shown 10.73% of individuals 65 years of age have Alzheimer’s based on a 95% CI of the true proportion.