A large box of LED bulbs was supplied to an electrical shop. From experience, the proportion of defective LED bulbs supplied is 3%. If a sample of 50 LED bulbs were selected randomly, find the probability that from 1% to 4% of the LED bulbs are defective.
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- Lemons and Car Crashes Listed below are annual data for various years. The data are weights (metric tons) of lemons imported from Mexico and U.S. car crash fatality rates per 100,000 population [based on data from “The Trouble with QSAR (or How I Learned to Stop Worrying and Embrace Fallacy)” by Stephen Johnson, Journal of Chemical Information and Modeling, Vol. 48, No. 1]. Lemon Imports 230 265 358 480 530 Crash Fatality Rate 15.9 15.7 15.4 15.3 14.9 Question ---- > Find the critical values of r using α = 0.05 and write Ho and H1 Group of answer choices r = ± 0.878 Ho : ρ = 0 H1: ρ < 0 r = ± 0.811 Ho : ρ = 0 H1: ρ > 0 r = ± 0.878 Ho : ρ = 0 H1: ρ ≠ 0 r = 0.878 Ho : ρ > 0 H1: ρ ≠ 0Statistics Bootstrap Distributions Assignment Create and analyze two bootstrap distributions using the data in the table below. A recent study examined the effect of diet cola consumption on calcium levels in women. A sample of 16 healthy women aged 18 - 40 were randomly assigned to drink 24 ounces of either diet cola or water. Their urine was collected for three hours after ingestion of the beverage and calcium excretion (in mg) was measured. The researchers were investigating whether diet cola leaches calcium out of the system, which would increase the amount of calcium in the urine for diet cola drinkers. The data are given below and are stored in the ColaCalcium data set. Diet Cola Water 48 1 50 1 2 62 2 46 3 48 3 54 4 55 4 45 5 58 5 53 6 61 6 46 7 58 7 53 8 56 8 48 XD Xw 1. By hand, find 10 bootstrap samples for diet cola and for water and sketch a dotplot showing the means of the samples. Also indicate the mean of the original data and the samples. Diet Cola Bootstrap Samples.…Question Help A research center claims that 31% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 800 adults in that country, 34% say that they would travel into space on a commercial flight if they could afford it. At a = 0.10, is there enough evidence to reject the research center's claim? Complete parts (a) through (d) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) O A. At least % of adults in the country would travel into space on a commercial flight if they could afford it. OB. 31 % of adults in the country would travel into space on a commercial flight if they could afford it. %. O C. The percentage adults in the country who would travel into space on a commercial flight if they could afford it is not O D. No more than % of adults in the…
- Explain it properly When Ho is not rejected, the data supports-_____________________ . When Ho is rejected, the data supports _______________________________Content A Math 2250 Unit 4 Post Test Re X b My Questions | bartleby x + webassign.net/web/Student/Assignment-Responses/last?dep=24515412 The director of library services at a college did a survey of types of books (by subject) in the circulation library. Then she used library records to take a random sample of 888 books checked out last term and classified the books in the sample by subject. The results are shown below. Percent of Books on Subject in Circulation Library on This Subject Number of Books in Subject Area Sample on This Subject 256 Business 32% Humanities 25% 215 Natural Science 20% 222 Social Science 15% 111 All other subjects 8% 84 Using a 5% level of significance, test the claim that the subject distribution of books in the library fits the distribution of books checked out by students. (a) What is the level of significance? State the null and alternate hypotheses. O Ho: The distributions are the same. : The distributions are the same. O Ho: The distributions are…View Policies Current Attempt in Progress Better Traffic Flow The dataset TrafficFlow gives the delay time in seconds for 24 simulation runs in Dresden, Germany, comparing the current timed traffic light system on each run to a proposed flexible traffic light system in which lights communicate traffic flow information to neighboring lights. On average, public transportation was delayed 105 seconds under the timed system and 44 seconds under the flexible system. Since this is a matched pairs experiment, we are interested in the difference in times between the two methods for each of the 24 simulations. For the n = 24 differences D, we were given that xp = 61 seconds with sp = 15.19 seconds. We wish to estimate the average time savings for public transportation on this stretch of road if the city of Dresden moves to the new system. %3D %3D The standard error is 3.1 for one set of 10,000 bootstrap samples. Find a 95% confidence interval for the average time savings. Click here for the…
- Type of Medicine A medical researcher wishes to determine if the type of vitamin pills taken is related to the age of the person. The data are shown. At α=0.10, is the type of vitamin related to the age of the person taking the vitamin? Use the critical value method with tables. Type Age Liquid Tablet Gummy 20 - 39 5 16 7 40 - 59 10 24 15 60 -over 12 9 8 1) State the hypotheses and identify the claim. H0: The type of vitamin pill is (DEPENDANT ON or INDEPENDANT OF?) the age of the person taking the pill. (CLAIM OR NOT CLAIM?) H1: The type of vitamin pill is (DEPENDANT ON or INDEPENDANT OF?) the age of the person taking the pill. (CLAIM OR NOT CLAIM?) 2. Find the critical value 3. Compute the test value: X^2= 4. Reject or Do not reject the null hypothesis 5. Summarize: Is there or is there not enough evidence to reject the claim?Is there or is there not enough evidence to support the claim?Testing Hypothesis A medical researcher says that less than 25% of Filipino adults are smokers. In a random sample of 200 Filipino adults, 19.3% say that they are smokers. At a = 0.05, what is the decision on its hypothesis? O Reject null hypothesis O Fail to reject null hypothesisDiabetes Improving control of blood-glucose levels is an important motivation for the use of insulin pumps by diabe- tic patients. However, certain side effects have been reported with pump therapy. Table 2 provides data on the occurrence of diabetic ketoacidosis (DKA) in patients before and after start of pump therapy. Table 2: Occurrence of DKA in patients before and after start of insulin-pump therapy Before pump therapy After pump therapy No DKA DKA No DKA 145 72 DKA 65 28 10. What is the appropriate procedure to test whether the rate of DKA is different before and after start of the pump therapy? 11. Perform the significance test in Problem 10, and report a p-value.
- High School Band - In most US high schools, students can play an instrument in three types of bands. A random sample of high school band students was taken and the results are summarized in the table below. Instrument type Band Woodwind Brass Percussion type Concert 31 25 8 Jazz 10 16 10 Marching 65 65 27 To assess whether there is a relationship between band type and instrument type, we conduct an appropriate hypothesis test. Based on the p-value that you calculated in the previous learning check question, which of the following describes the evidence to say that there is a relationship between band type and instrument type? Little evidence Some evidence Strong evidenceCan you please check check my workWhile rejecting H0 on a hypothesis test means that _______, measures of effect size tell you ______. how big an effect the treatment has; that the treatment has some effect that the treatment has some effect; how big an effect the treatment has that the treatment caused an increase; that the treatment caused a decrease d. that the treatment caused a decrease; that the treatment caused an increase