) Compute the predictive value positive and predictive
Q: A coin is tossed eight times. what is the probability that exactly 5 heads will occur?(Hint: Use Bin...
A: Let X be the number of heads from binomial distribution with probability of getting head (p) = 1/2 =...
Q: Recent data suggest that nationally, scores on the Critical Reading section of the SAT follow a norm...
A:
Q: a) Suppose that Luke flies with Spirit Airlines, which posts a flight time of 2 hours and 5 minutes ...
A:
Q: Illustration 54. From the following data relating to the average quarterly prices of a commodity obt...
A:
Q: he following results are from data where the dependent variable is the selling price of used cars, t...
A: Given:
Q: 1. Step - and - leaf display
A: Here We will use 7/4 for 74. 7 is stem and 4 is leaf.
Q: A market research firm supplies manufacturers with estimates of the retail sales of their products f...
A: 1. a) Denote μ1, μ2 as the population mean sales for this year and last year, respectively.
Q: The sugar content of the syrup in canned peaches is normally distributed, and the variance is though...
A:
Q: Assume that a randomly selected subject is given a bone density test. Those test scores are normally...
A: Let Z be the random variable from standard normal distribution with mean = 0 and standard deviation ...
Q: Use the data set for the Registered Voters ** Please answer D -F *** A. Find the probability that a ...
A: Binomial Distribution: The binomial distribution estimates the chances of seeing a certain number of...
Q: Consider testing the hypotheses Ho: 0 =0 versus H1: 0 = 1 based on a random sample of size n = from ...
A:
Q: Determine if the statements below are true or false. For each false statement, suggest an alternativ...
A: here use chi square distribution basic
Q: You have a bag of marbles. There are 3 red marbles, 2 green marbles, 7 yellow marbles, and 3 blue ma...
A:
Q: rite the complete solution in your paper. But pick the decision here. O Fail to reject Ho.
A: Given 10.2, 9.7, 10.1,10.3, 10.1,9.8, 9.9, 10.4, 10.3, and 9.8 liters. Use a 0.01 level of significa...
Q: Use technology and a t-test to test the claim about the population mean μ at the given level of sig...
A:
Q: From the data given below compute the index number of the food group and ie retail price index numbe...
A:
Q: The bookstore at IRSC would like to estimate the proportion of students who prefer electronic textbo...
A: For the given data Find 96% Confidence interval
Q: An automobile manufacturer needs to estimate the average highway fuel economy (miles per gallon) for...
A: We have given that, Sample mean (x̄) = 33.5, standard deviation (s) = 2.2 and sample size (n) = 101...
Q: Find the mean, variance, and standard deviation for the number of sixes that appear when rolling 40 ...
A:
Q: For the following data set {58, 32, 22, 39, 47, 77}, the width of each class in the frequency table ...
A:
Q: What is the probability of drawing 2 red balls and then 3 blue balls from an urn containing 6 red ba...
A:
Q: Find the probability that the time it takes a passenger to travel from the main terminal to the conc...
A: Passenger congestion is a service problem in airports. Trains are installed within the airport to re...
Q: Which of the following pairs are independent events
A: HERE USE , basic of independent events
Q: at your cereal: Boxes of cereal are labeled as containing 14 ounces. Following are the weights, in o...
A: We have given that, Sample size (n)= 16 Then, We will find the 99.5% confidence interval for popu...
Q: Determine the seasonal indices by the link relative method for the following time series Sales (in '...
A:
Q: Premature-birth Risk Found Higher for Teens (reported in the Sacramento Bee, April 27, 1995, p. A7) ...
A: Given Relative risk=1.9 Find Absolute risk for women in their 20's which is used as baseline
Q: (3) (without pole compensation) with the above magnitude and phase plots, suppose we enforce B = 0.0...
A: The phase margin is the amount of phase shift when the (VFB) gain of the amplifier passes through 0d...
Q: 1. What is the difference between the t-statistic you calculate from your sample and teritical that ...
A: We have given that the statement about t-statistic calculated from the sample and t-critical value f...
Q: What would the degrees of freedom be for the Chi-Square test with a contingency table with 5 rows an...
A: Given that Contingency table with 5 rows and 4 columns Find degree of freedom df=(rows-1)*(column...
Q: A soccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.18 inch...
A: From the provided information, Standard deviation (σ) = 0.6 Confidence level = 99% Margin of error (...
Q: Create a problem statement about computing the length of confidence interval and determining the sam...
A: In an automaticity experiment community college students were given two opportunities to go to the c...
Q: In a national survey of 2013 adults, 1283 indicated that they believe rudeness is a more serious pro...
A: Given that
Q: For the following population, calculate the mean, median, mode, variance, standard deviation, coeffi...
A: Use EXCEL Procedure for finding the given values. Follow the instruction to obtain the values: ...
Q: Statement 1: Shapiro-Wilk test and Kolmogorov-Smirnov test are used to check the heteroscedasticity ...
A: Statement 1 Shapiro-Wilk test used for normality and Kolmogorov-Smirnov test are nonparametric test...
Q: In a sample of 50 business trips taken by employees in the HR department, a company finds that the a...
A: Given that ; n1 = 50 Mean1 = $1450 S1 = $450. n2 = 90 Mean2 = $1650 S2 = $550 Level of significan...
Q: The principal randomly selected six students to take an aptitude test. Their scores were 79 88 83 80...
A: " Since you have posted a question with multiple sub-parts, we will solve the first three subparts f...
Q: Consumption of alcoholic beverages by young women of drinking age has been increas- ing in the Unite...
A: The random variable annual consumption of alcoholic beverages follows normal distribution. We have t...
Q: Using a 98% confidence level, determine a confidence interval for the mean lifespan of all Florida M...
A:
Q: The probability of getting exactly x success is n trails is denoted by, P(X=x)=?
A:
Q: 7. The mean number of arrivals per minute is 4. Find the probability that (a) no customers are waiti...
A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts fo...
Q: Consider independent trials, each of which results in outcome i, i = 0, 1, .,k, with probability Pi,...
A:
Q: Three investors are dividing a piece of land worth $1,200,000. Each investor's value in thousands fo...
A: Land worth = 1200,000 We have to use long divider method to know every one share. Here Chooser 1 ...
Q: The following table contains observed frequencies for a sample of 200. Column Variable Row Variable ...
A: For the given data, we need to test for independence of the row and column variables using 0.05 leve...
Q: Given in the table are the BMI statistics for random samples of men and women. Assume that the two s...
A:
Q: 4. A professor gives a multiple choice question on an exam for which there are only two answers: "ye...
A: Note: As per our policy we can answer only 1st question. kindly repost the remaining question. 4) Gi...
Q: box contains 5 ide_ntical batter_ies. Among, 2 of th_em are “new” and work _properly, whe_reas the o...
A: Let the random variable X denotes the number of batteries needed to be tested. There are 5 batteries...
Q: Joe, a DOH COVID-19 tracker, found out that the number of infected persons of COVID-19 in seven low-...
A: 1. We have population values 1,2,7,8,9,10,121,2,7,8,9,10,12 population size N=7N=7 and sample size n...
Q: Construct the confidence interval for the population mean u. c = 0.98, x= 4.2, o = 0.6, and n= 57 A ...
A:
Q: Is the following considered a probability distribution? -1 1 P(x) 0.50 0.30 0.20 Ο Νο. Σp (π) 41 O Y...
A:
Q: Let X, Y be independent random variables with exponential distribution of parameter θ > 0. Are the r...
A: Solution
!.) Compute the predictive value positive and predictive value negative.
Step by step
Solved in 2 steps
- People often wait till middle age to worry about having a healthy heart. However, recent studies have shown that earlier monitoring of risk factors such as blood pressure can be very beneficial (The Wall Street Journal, January 10, 2012). Having higher than normal blood pressure, a condition known as hypertension, is a major risk factor for heart disease. Suppose a large sample of individuals of various ages and gender was selected and that each individual’s blood pressure was measured to determine if they have hypertension. For the sample data, the following table shows the percentage of individuals with hypertension. Develop a side-by-side bar chart with age on the horizontal axis, the percentage of individuals with hypertension on the vertical axis, and side-by-side bars based on gender. What does the display you developed in part (a), indicate about hypertension and age? Comment on differences in gender. Age Male Female 20 - 34 11.0% 9.0% 35 – 44…Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining the effects of radiation on organisms, an expert claimed that the amount of gamma radiation needed to sterilize a colony of tardigrades no longer has a mean of 1350 Gy (grays). (For comparison, humans cannot withstand more than 10 Gy .) A study was conducted on a sample of 18 randomly selected tardigrade colonies, finding that the amount of gamma radiation needed to sterilize a colony had a sample mean of 1375 Gy , with a sample standard deviation of 75 Gy . Assume that the population of amounts of gamma radiation needed to sterilize a colony of tardigrades is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to support the claim that μ , the mean amount of gamma radiation needed to sterilize a colony of tardigrades, is not equal to 1350 Gy .Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining the effects of radiation on organisms, an expert claimed that the amount of gamma radiation needed to sterilize a colony of tardigrades no longer has a mean of 900 Gy (grays). (For comparison, humans cannot withstand more than 10 Gy .) A study was conducted on a sample of 27 randomly selected tardigrade colonies, finding that the amount of gamma radiation needed to sterilize a colony had a sample mean of 907 Gy , with a sample standard deviation of 17 Gy . Assume that the population of amounts of gamma radiation needed to sterilize a colony of tardigrades is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to support the claim that μ , the mean amount of gamma radiation needed to sterilize a colony of tardigrades, is not equal to 900…
- Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining the effects of radiation on organisms, an expert claimed that the amount of gamma radiation needed to sterilize a colony of tardigrades no longer has a mean of 900 Gy (grays). (For comparison, humans cannot withstand more than 10 Gy .) A study was conducted on a sample of 27 randomly selected tardigrade colonies, finding that the amount of gamma radiation needed to sterilize a colony had a sample mean of 907 Gy , with a sample standard deviation of 17 Gy . Assume that the population of amounts of gamma radiation needed to sterilize a colony of tardigrades is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to support the claim that μ , the mean amount of gamma radiation needed to sterilize a colony of tardigrades, is not equal to 900…The 5-year incidence of cardiovascular disease (CVD) in relation to smoking status was determined in a population sample of 1000 men, 18 years and older. At baseline, 30% of the men were classified as being current smokers and 70% as being non-smokers. At the end of the follow-up, 60 CVD events had occurred among the smokers and 70 events among the non-smokers. Construct a 2 x 2 table based on the data providedA case−control study was performed among 145 subjects with macular degeneration and 34 controls, all of whom were 70- to 79-year-old women. A genetic risk score was developed to help differentiate the cases from the controls. The risk score was categorized into six groups (1, 2, 3, 4, 5, 6), with 6 being the highest risk and 1 being the lowest risk.The data in Table 10.48 were obtained relating the risk score to case/control status. taBlE 10.48 risk score cases controls 1 3 11 2 7 3 3 6 6 4 10 8 5 11 2 6 108 4 total 145 34 10.139 What test can be performed to study the asso- ciation between case/control status and risk score? Spe- cifically, we are interested in testing whether cases tend to have consistently higher risk scores or consistently lower risk scores than controls.
- One study on the effects of cannabis used rats as test organisms; data in the table below describe theweight (g) of livers harvested from some of the test rats.13.47, 12.19, 6.35, 12.62, 6.8, 6.78, 6.62, 10.3, 10.21, 8.47, 5.56, 9.837.62, 4, 9.82, 5.2, 8.61, 11.7, 9.76, 12.16, 7.87, 7.16, 12.31, 16.9, 6.72Use these data to answer the following questions.a) Fill in the missing sample statistics in the table; enter values to three decimal places. Statistic Value Statistic ValueSample size Estimated standard deviationMinimum Estimated varianceMaximum Estimated skewnessMean Estimated kurtosisb) Create a boxplot of the data, and include that figure as part of your solution. How many outliers do you think there are in this dataset? c) Create a histogram of the data, and include that figure as part of your solution. What parametric distribution do you think is appropriate for the data? d) Create a quantile‐quantile…A study is performed to examine the relationship between the concentration of plasma antioxidant vitamins and cancer risk. Table 7-66, shows data for plasma vitamin-A concentration in stomach cancer patients and in controls (participants similar to the cancer patients but free of disease). Is there a significant vitamins between patients with stomach cancer and controls? Run the appropriate test at a 5% level of significance.Rosner analyzed data from children who lived near a lead smelter (which is a facility that uses extreme heat to extract the metal lead from lead ore) in El Paso, Texas, and reported that out of 124 children studied, 23 developed colic (which is a pattern of fussiness and crying for no apparent reason). Suppose that in the state of Taxes in general at the time (early 1980s), the rate of colic in children was 16.0%. Follow the steps for testing whether the proportion of children developing clico was significantly different for the 124 children living near the lead smelter than for Taxes children in general (16%). Use alpha level of 0.03 a. Identify the null hypothesis for this statistical test. b. Identify the alternative hypotheses for this statistical test. c. Explain: Why should this be a two-tailed test, the way I have described it? d. calculate the sample proportion p̂, rounded to three decimal places. e. Calculate the appropriate test statistic, show all work. f. Based on…
- Twenty adult males between the ages of 30 and 40 participated in a study to evaluate the effect of a specific health regimen involving diet and exercise on the blood cholesterol. Ten were randomly selected to be a control group, and ten others were assigned to take part in the regimen as the treatment group for a period of 6 months. The following data show the reduction in cholesterol experienced for the time period for the 20 subjects: Control group: 7, 3, −4, 14, 2, 5, 22, −7, 95Treatment group: −6, 5, 9, 44, 12, 37, 5, 3, 3 (a) Do a dot plot of the data for both groups on thesame graph.(b) Compute the mean, median, and 10% trimmedmean for both groups.(c) Explain why the difference in means suggests oneconclusion about the effect of the regimen, whilethe difference in medians or trimmed means suggests a different conclusion.Efforts by airlines to improve on-time arrival rates are showing results. Boston.com reports that in the first 10 months of 2012 on-time arrival rates at U.S. airports were the highest they have been since 2003. During this period 82% of flights landed within 15 minutes of their scheduled time. Are there differences among the major airlines? The data in Sheet 35 show the number of on-time arrivals for samples of flight taken from seven major U.S. airlines in 2012. Using a 0.05 level of significance, what is the p-value and what is your conclusion? Sheet 35 Arrivals American Airlines Continental Airlines Delta Airlines JetBlue Airlines Southwest Airlines United Airlines US Airways On-time 83 54 96 60 69 66 68 Late 16 18 21 22 23 15 12 99 72 117 82 92 81 80 Select one: a) Chi-square statistic = 4.32, p-value = 0.034, reject the null hypothesis, there is a statistically significant differences in the proportion of on-time arrivals b) Chi-square statistic = 7.370,…Cadmium, a heavy metal, is toxic to animals. Mushrooms, however, are able to absorb and accumulate cadmium at high concentrations. The Czech and Slovak governments have set a safety limit for cadmium in dry vegetables at 0.5 part per million (ppm). M. Melgar et al. measured the cadmium levels in a random sample of the edible mushroom Boletus pinicola and published the results in the paper “Influence of Some Factors in Toxicity and Accumulation of Cd from Edible Wild Macrofungi in NW Spain” (Journal of Environmental Science and Health, Vol. B33(4), pp. 439–455). A hypothesis test is to be performed to decide whether the mean cadmium level in Boletus pinicola mushrooms is greater than the government’s recommended limit. Hypothesis tests are proposed. For each hypothesis test,a. determine the null hypothesis.b. determine the alternative hypothesis.c. classify the hypothesis test as two tailed, left tailed, or right tailed.