1. A researcher would like to compare the acidity level of five brands of yogurt that being sold in the supermarket. This researcher have suspected that different batch also will effect the acidity level of the yogurt. Brand Batch A B E 1 8.04 6.61 11.99 5.78 6.4 2 9.58 6.58 10.66 5.34 7.92 3 7.98 7.98 11.98 4.94 5.32 4 9.74 6.46 9.14 4.12 6.32 Based on the given data, test the hypothesis (at significant level of 0.01) that the acidity level of the yogurt are significantly different between brands. Does the researcher's suspicion are true? с D
Q: 8.104 Gas mileage of the Honda Civic. According to the Environmental Protection Agency (EPA) Fuel…
A: Given Information: Hypothesized value of the population mean is 36. Sample size n=50 Sample mean…
Q: The correlation coefficient for number of energy drinks consumed and blood caffeine content is 0.67.…
A: The independent variable is number of energy drinks consumed. The dependent variable is blood…
Q: pany 2 = 355 3.24 = 0.52 on about these two co
A: The null and alternative hypothesis is as follows: Given: As the population standard deviation is…
Q: A researcher wanted to examine the effect of a new math study skills program on second graders.…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: 10. Let's say I have collected a sample of size 5. 11, 12, 13, 14, 15 be the sample. The cor-…
A: The z-scores for the sample observations of x1, x2, x3, x4, and x5 are z1=1.556, z2=−0.944,…
Q: How many customers should the company survey in order to be 95% confident that the estimated…
A: It is given that Level of confidence = 95% Margin of error E = 2 percentage points = 2% = 0.02
Q: 7.71 Comparison of dietary composition. Refer to Example 7.15 (page 443). That study also broke down…
A:
Q: A cigarette manufacturer claims that his cigarettes have nicotine content that does not exceed 2.0…
A:
Q: An experiment was designed with the intention of studying the treatment with urea and aqueous…
A: Blocking factor: The relative weight of the sheep was used as a blocking factor to separate them…
Q: To compare customer satisfaction levels of two competing products, 10 customers of company 1 and…
A: We have to compare the customer satisfaction level of two competing products. 10 customers are…
Q: (a) Construct an R chart for these data. Does the R chart indicate that the process is in a state of…
A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts. In case…
Q: One of the most feared predators is the great white shark, which can grow to a mean length of 21…
A: Given, population mean (µ) = 21 sample size (n) = 3
Q: a. What is the standard deviation of sampling distribution of the sample mean for Machine 1? b. Find…
A: Given Data : a) For Machine 1 : Count, N: 9 Sum, Σx : 144.1 Mean, x̄2 =Σx/N 16.0111…
Q: Solid fats are more likely to raise blood cholesterol levels than liquid fats. Suppose a…
A: Given: n1 = 6 n2 = 6 Formula Used: Test-statistic t = X1-X2sp1n1+1n2 sp = (n1-1)s12+(n2-1)s22n1+n2-2
Q: Suppose you wish to determine whether there are differences in the average prices among 3 major…
A:
Q: The British Department of Transportation studied to see if people avoid driving on Friday the 13th.…
A: μd=mean of difference calculated and we will test whether it s zero or notSo the null and…
Q: State the null and alternative hypotheses
A: Let Given a data of Carpeted rooms and uncarpeted rooms. sample size of first sample n1=8 sample…
Q: To test for any significant difference in the number of hours between breakdowns for four machines,…
A: a). i) C ii) 18.52 iii) 0.01346 iv) A b) i) 1.208539ii) 2.0iii) AExplanation:Step 1:Given, data set…
Q: Based on a suitable statistic, find out the counter with more consistent performance.
A: Determine the data points for the both the counter from stem and leaf plot: Counter A Counter B…
Q: 2. (10 pts) A car manufacturer wants to find out which car color they should select for the display…
A: ONE way anova
Q: 3. A group of researchers would like to find out if there is a significant difference in the content…
A: Given information: The data obtained from the nA=10 and nB=12 samples of both the products are:…
Q: A resercher inntnerested in evaluation environmetnally freindly behaviors evaluated how often people…
A: Introduction: Denote μ1, μ2 as the true population mean number of times people with a pessimistic…
Q: 1. A dog groomer is often asked if small dogs bark more than larger dogs. To test this, he logs the…
A: STEPS IN SPSS (For Parts A and B)SPSS Step 1: Encode the dataSPSS Step 2: Click Analyze > Compare…
Q: The table shows the lifetimes in hours of samples from three different types of plant species…
A: Sample 1 Sample 2 Sample 3 457 454 460 461 456 458 459 458 456 455 458 452
Q: 15 16 materials generated 17 materials combusted 18 matetials landfilled 19 20 source 21 22 tween…
A:
Q: 10. Journal Science and Technology published a study on the ammonia levels in the air near an exit…
A: Level of Significance: In testing of hypothesis, Level of Significance is the probability of…
Q: 9. The following table shows the number of bacteria colonies present in each of several petri…
A: a) The hypotheses are;
Q: 3. You collected 10 years of daily data. Based on that you find first trading day of each month…
A: Hi! Thank you for the question, As per the honour code, we are allowed to answer three sub-parts at…
Q: The manufacturer of an electrical vehicle, X, is interested in testing two different battery…
A: The given data is:Unit AUnit B23312328272929322734Given significance level = 0.01 (1%)Data is not…
Q: 3. Suppose that the inside diameter of bulb lamp manufactured by a company are normally distributed…
A: Reviewing information, X : Diameter of bulb lamp n=200 X~N(μ=0.502 , σ=0.005)
Q: 11. Three training methods are employed and then compared to determine if there are differences in…
A: One way ANOVA : A one-way street ANOVA is a statistical test that evaluates the variation in group…
Q: Suppose there is some overlap between the 95% CIs of two groups. Does this necessarily imply there…
A: Given that Suppose there is some overlap between the 95% CIs of two groups. Does this necessarily…
Q: Following are the weight gains in pounds of 2 randomly samples of young turkeys fed 2 different…
A: Null Hypothesis: H0: The average the second diet produces a equal gain in weight with first diet.…
Q: .Taggart Vanetten ran the Marathon in 151 minutes what is his percentile ?what does it mean in the…
A: Given, Data is provided in this table: Sum of minutes in data: 7196 Total no. of values : 40
Q: 2. Let Z be a supercritical branching process with Zo = 1 and family-size generating function G.…
A:
Q: 1.2. Consider the following ANOVA model of wages: WAGE, = B, + B2 GENDER, + 4, where GENDER, is a…
A: Given: WAGEi=β1+β2GENDERi + μiWhere GENDERi is a dummy variable
Q: The British Department of Transportation studied to see if people avoid driving on Friday the 13th.…
A: The British Department of Transportation studied to see if people avoid driving on Friday the 13th.
Q: . You collected 10 years of daily data. Based on that you find first trading day of each month…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: 1. In a research project on the influence of music on retail shopping expenditure, a researcher…
A: Hi! Thank you for the question As per the honour code, We’ll answer the first question since the…
Q: What is the linear correlation coefficient, r, for the following set of sample data? 0.8468 0.9747…
A: X values Y values (X-MX) (Y-MY) (X-MX)2 (Y-MY)2 (X-MX)(Y-MY) 3 -6 -3.000 -4.800 9.000 23.040…
Q: 8. The following data were collected in a clinical trial to compare a new drug to a placebo for its…
A: As per guidelines we will solve first question only, please repost other questions for more answers.…
Q: Consider the test for differences in age among the new drug compared to the placebo (two variables).…
A: Hi! Thank you for the question, As per the honour code, we are allowed to answer three sub-parts at…
Q: Suppose that the average salary of health systems professionals is normally distributed with µ=KES…
A: Step 1: Let, X be the random variable that represents the average salary of health systems…
Q: 1. Suppose that you have to decide if the mean of the light bulbs last longer than 150 hours. You…
A: Hypothesis testing is a tool for making statistical inferences about the population data. It is an…
Q: The regulation of electric and gas utilities is an important public policy question affecting…
A: Hi! Thank you for the question, As per the honor code, we are allowed to answer one question at a…
Q: Suppose that you have to decide if the mean of the light bulbs last longer than 150 hours. You…
A: From the provided information,Sample size (n) = 14Level of significance (α) = 0.05
Step by step
Solved in 6 steps
- What is the population and sample of this study?A county environmental agency suspects that the fish in a particular polluted lake have elevated mercury levels. To confirm that suspicion, five striped basses in that lake were caught and their tissues were tested for mercury. For the purpose of comparison, four striped basses in an unpolluted lake were also caught and tested. The fish tissue mercury levels in mg/kg are given below. Sample I(From Polluted Lake) 0.523 0.723 0.523 0.623 0.523 Sample II(From Unpolluted Lake) 0.323 0.223 0.523 0.323 0.000 (a) Construct the 95% confidence interval for the difference in the population means based on these data. (b) Test, at the 5% level of significance, whether the data provide sufficient evidence to conclude that fish in the polluted lake have elevated levels of mercury in their tissue.The automated data collection system for a manufacturing process will record data for 25,000 parts per day. Assume that, when stable, a certain process will operate with a nonconformance rate of 37.6 NCPPM (nonconforming parts per million). If the nonconformance rate per day is to be monitored using a control chart, what type of chart would be used? Choose a P, U, or X-Bar/S Charts, and explain in a few words.
- Data on the average size of a soda (in ounces) at all thirty major league baseball parks are as follows: 14, 18, 20, 16, 16, 12, 14, 16, 14, 16, 16, 16, 14, 32, 16, 20, 12, 16, 20, 12, 16, 16, 24, 16, 16, 14, 14, 12, 14, 20. Compute descriptive statistics for this variable. Comment on the results. Presuming the first fifteen are drink sizes in the American League and the last fifteen are drink sizes in the National League, test the hypotheses: Soft drink sizes are larger at American League Ball Parks than at National League Ball Parks. Do the data represent a sample or a census?7.2 A coffee manufacturer imports green coffee beans from several countries and suppliers. Beans are usually shipped by sea in large containers. Each freighter is met at the dock as it is unloaded, and before contain- ers of beans are accepted, samples from each con- tainer are drawn and tested. One of the quality characteristics monitored is moisture content. High moisture content can be evidence of water seepage into the container during shipment, which can result in beans that are contaminated, are fermented, or have unacceptable levels of mold. The target value for mois- ture is 11.5 percent, and the maximum acceptable value is 13.0 percent. Shipments with moisture read- ings above the maximum are rejected. The following data represent moisture content for four samples drawn from each of 35 containers from one supplier. SAMPLE Container 1 3 4. 10.7 10.4 10.2 10.3 1 10.9 10.9 10.9 10.3 10.6 10.8 10.3 10.5 10.7 11.1 10.9 10.2 10.7 10.8 10.3 9.7 4 5 10.6 10.7 10.7 10.7 10.9 10.9 6 7…(Case Study) A group of children who lived near a lead smelter in El Paso, Texas, were identified and their blood levels of lead were measured. An exposed group of 80 children were identified who had blood-lead levels 2 40 µg/mL in 1972-1973, and it was identified as group 2. A control group of 112 children were also identified who had blood-lead levels < 40 ug / mL in 1972-1973, and was identified as group-1. For both groups, the number of finger-wrist taps in the dominant hands (MAXFWT) for the both groups are displayed with a box plot as shown below: 80 70 55 49 49 40 Group-1 Group-2 How many the dominant hands between 49 and 70? children in the control group have the number of finger-wrist taps in MAKEWT
- Acid rain from the burning of fossil fuels has caused many of the lakes around the world to become acidic. The biology in these lakes often collapses because of the rapid and unfavorable changes in water chemistry. A lake is classified as nonacidic if it has a pH greater than 6. The following sample of pH levels obtained by the researchers for 15 lakes: 7.2, 7.3, 6.1, 6.9, 6.6, 7.3, 6.3, 5.5, 6.3, 6.5, 5.7, 6.9, 6.7, 7.9, 5.8. At the 5% significance level, do the data provide sufficient evidence to conclude that, on average, high mountain lakes in the Southern Alps are nonacidic? Set up the null and alternative hypothesis plus carry out the complete test using the critical value or P-value approachClothes dried outside smell better than those dried in a dryer because of a process called photolysis. Sunlight breaks down compounds that cause odor. A trained smeller is asked to smell a random sample of 20 towels. The smeller does not know it, but all of the 20 towels have been dried in the sun. The smeller is blindfolded and is not allowed to touch the towels but leans forward to smell the towel then rates the towel on a smell-scale of 1 to 10, where 1 is the an extremely unpleasant smell and 10 is a very good smell. A smell rating of 8 is typically attributed to a towel that is dried in the dryer. The mean smell rating for these 20 towels is approximately normal with a mean of 8.45 and the standard deviation is 0.887. A statistician performs a test of Ho: μ = 8 versus H₁ μ> 8 where is the true mean smell rating for all towels dried in the sun. This test yields a P-value of 0.0176. What conclusion would you make at the significance level a = 0.01? Because the P-value of 0.0176 > a…Clothes dried outside smell better than those dried in a dryer because of a process called photolysis. Sunlight breaks down compounds that cause odor. A trained smeller is asked to smell a random sample of 20 towels. The smeller does not know it, but all of the 20 towels have been dried in the sun. The smeller is blindfolded and is not allowed to touch the towels but leans forward to smell the towel then rates the towel on a smell-scale of 1 to 10, where 1 is the an extremely unpleasant smell and 10 is a very good smell. A smell rating of 8 is typically attributed to a towel that is dried in the dryer. The mean smell rating for these 20 towels is approximately normal with a mean of 8.45 and the standard deviation is 0.887. A statistician performs a test of Ho μ = 8 versus H₁ μ> 8 where is the true mean smell rating for all towels dried in the sun. This test yields a P-value of 0.0176. What conclusion would you make at the significance level a = 0.05? Because the P-value of 0.0176 < α =…
- Suppose the Land Transportation and Franchising Regulatory Board (LTFRB) wants to examine the safety of Public Utility Vehicles (PUVS)- Jeepneys, Van and Buses. It collects a sample of three for each of the PUVS for analysis. Using the hypothetical data provided below, test whether the mean pressure applied to the driver's head during a crash test is equal for each type of PUVS. Use a =5%. JEEPNEY VAN BUS 643 469 484 655 427 456 702 525 402 Using the data in the previous example, at a = 0.05 level of significance, test the claim that the two populations have equal means. STEP 1: State the hypotheses Ho: 41 = 42 Ha: H1 * 42 STEP 2: Level of Significance a=0.05 STEP 3: Determine the critical value Since a=0.05 and the test is right-tailed, dfNumerator %3D dfpenominator = The critical value isThe British Department of Transportation studied to see if people avoid driving on Friday the 13th. They did a traffic count on a Friday and then again on a Friday the 13th at the same two locations. The data for each location on the two different dates is in the table. Do the data show that on average fewer people drive on Friday the 13th? Test at the 5% level.Traffic Count Dates 6th 13th 1990, July 137669 135825 1990, July 129699 128891 1991, September 136898 138275 1991, September 138966 139940 1991, December 132021 129640 1991, December 119268 119214 1992, March 131938 131104 1992, March 123306 124760 1992, November 129499 129219 1992, November 138568 135934An experiment was designed with the intention of studying the treatment with urea and aqueous ammonia of the ear of wheat. The purpose was to improve the nutritional value for male ewes. The dietary treatments were: control, urea in the feed, spike treated with ammonia, spike treated with urea. In the experiment, 24 sheep were used and they were separated according to their relative weight into 6 groups. The digested dry matter measured in percentage was recorded and it is known: (image) Find Blocking factor, number of experimental runs, Experimental unit, Response variable and factor of interest