It is estimated that 15% of teens own iphone. In the MDM4U class there are 25 teens who own smartphones. How many of these 25 students do you expect to own an iphone
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It is estimated that 15% of teens own iphone. In the MDM4U class there are 25 teens who own smartphones. How many of these 25 students do you expect to own an iphone?
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- Antibiotic is claimed to be effective in 70% of the patients it is given to. If antibiotic is given to 10 patients, how many patients would be expected to get better?create a diagram of the situation 81% of college students take online classes, 36% online students have gained more than 5 pounds in last 6 months 15% students did not take online gained 5 pounds in the last 6 months.In a recent article published by Scientific American found that only 82% of Millennials are certain the world is round. That seems low to you, you believe that more than 82% of Millennials believe the world is round. You randomly sample 75 Millennials and find that 68 of them believe the earth is round. The others didn't necessarily believe it is flat they might just be unsure of the earth's shape. Use your choice of Excel or Ti Calculator to complete a one proportion Z-test at 0.01 significance level. If using Excel, copy and Paste the appropriate Excel calculator into the sheet labeled Proportions. Or if using Ti Calculator, type an explanation of the Ti Calculator features you used and include the Z test statistic, and the p-value.
- In 2020, there were 7.8 billion people in the world, and 5.16 billion had cell phones.¹ Approximately % of the people on Earth do not have cell phones in 2020.Please see picture. Need this asap please and thank you. Pictures go togetherA manufacturer inspects 400 personal video players and finds that 399 of them have no defects. The manufacturer sent a shipment of 1,600 personal video players to a distributor. Predict the number of players in the shipment that are likely to have no defects.
- One of the basketball coaches at Cypress College wanted to see if Cypress College's Strength & Exercise class was increasing the weight that a player could bench press. The basketball coach randomly selected some of his players and determined how much they could bench press before taking the class. Then after completing the class, he again determined the weight that they could now bench press. The data for these players is given in the table below. Test whether the Strength and Exercise class is increasing the amount of weight that the players can bench press at the a=0.05 level of significance. Player Player 1 Player 2 Player 3 Player 4 Pounds Lifted Before 205 241 338 368 [ Select] ANOVA 2-SampFTest 252 330 360 2-SampTTest X^2-Test 2-PropZTest T-Test [ Select ] P-Value [ Select] ConclusionAn epidemiologists is studying two populations that have recently had an outbreak of a disease with similar symptoms. In one population of 600 people, 450 of them became infected and 3 of them died. In the other population of 200 people, 20 were infected and 10 died. Did the two towns have an outbreak of the same disease? Defend your answer. Use prevalence and mortality rates to help you.Several years ago, two companies merged. One of the concerns after the merger was the increasing burden of retirement expenditures. An effort was made to encourage employees to participate in the 401(k) accounts. Nationwide, 63% of eligible workers participated in these accounts. The accompanying data table contains responses of 30 employees of the company when asked if they were currently participating in a 401(k) account. Complete parts a through d. Click the icon to view the data table. a. Determine the sample proportion of company workers who participate in 401(k) accounts. The sample proportion is. (Round to three decimal places as needed.) b. Determine the sampling error if in reality the company workers have the same proportion of participants in 401(k) accounts as does the rest of the nation. The error is (Round to three decimal places as needed.) c. Determine the probability that a sample proportion at least as large as that obtained in the sample would be obtained if the…
- Researchers have been studying the reliability of a new medical test. On their last study, they found that the test accurately identified those with the disease 92% of the time, and it accurately identified those without the disease only 74% of the time. There were 1,000 total people in this study, and 200 of them had the disease. Complete the table below using this information. Then, use your completed table to help you answer the questions. Disease Is Present Healthy (Disease Is Not Present) 184 Positive Test Result 16 Negative Test Result ९ Enter text [more.. 592 a) If an individual does not have the disease, what is the probability that the test suggests that the disease is present? Give your answer as a percent rounded to the nearest hundredth, if necessary. Be sure to include the % when inputting your answer. 0.26 X b) If the test result suggests that the disease is present, what is the probability that the patient does not have the disease? Give your answer as a percent rounded…According to the results of a survey, 38% of 271 people indicated that American football is their favorite sport. Assuming that the percentage remains the same, how many more people should be surveyed to have a margin of error of 4%? Round up to the nearest whole number, if necessary. In order to have a margin of error of 4%, you need to survey more people.Several studies showed that after drinking an energy drink, subjects had increased performance when running a marathon. A beverage company financed this research. Identify what is wrong.
