long it takes, on average, to complete a coronary artery bypass surgery. She samples 25 surgeries and logs the time it takes to complete each one, in hours: 6.2, 5.8, 6.1, 6.2, 5.6, 6, 5.6, 5.9, 5.7, 5.9, 5.8, 5.5, 6.1, 6.3, 6.4, 5.9, 6.2, 5.7, 6.2, 5.4, 5.8, 5.6, 5.4, 6.1, 5.7 Assuming the population standard deviation is σ=0.25, construct a 89% confidence interval for the average time it takes to complete a coronary artery bypass surgery. xˉ=x̄= α2= zα2= Margin of Error: E= We are 89% confident that the mean amount of time it takes to complete a coronary bypass sugery is between ___hours and___

A researcher wants to know how long it takes, on average, for a certain species of bacteria to divide. She watches 16 cells through a microscope and times how long it takes them to divide. She obtains the following data, in hours: 8, 6.6, 9, 7.4, 6.1, 8.9, 10, 8.1, 8.4, 8.3, 8.3, 8.4, 4.9, 7.8, 7.4, 6.3 Assuming the population standard deviation is o = average time it takes this species of bacteria to divide. 1.1, construct a 97% confidence interval for the Margin of Error: E We are 97% confident that this species of bacteria takes, on average, between hours and hours to divide.

The owner of a book shop surveyed people who bought fantasy novels to see if the store should expand its hours.  What is the population?

A researcher hypothesized that cytokinins and auxins supplied by tumor-inducing insects lead to the production of tumors in plants. She performed experiments in which she hypodermically injected green pepper plants to determine if she could induce tumors. In one experiment she varied the concentration of cytokinin and the ratio of auxin concentration to cytokinin concentration. She used 3 concentrations of cytokinin and 6 ratios of auxin/cytokinin. The concentrations are indexed (1-3) with 3 indicating the highest concentration of cytokinin. The 6 ratios of auxin/cytokinin varied from 0.125 to 5.0 with values greater than 1 indicating that auxin was in greater concentration than cytokinin. The resulting data are in the date file "auxcyt.csv". The measured sizes of the tumors induced (relative to controls) are given in the 3rd column ('sumdiffd'). Analyze these data testing the appropriate hypotheses and interpret the results. (Note the unequal sample sizes.) auxcyt data…

Suppose the prevalence of "dance fever" at a college is 40% among women and 10% among men. If there are half as many men as women, what is the overall prevalence of dance fever at the college? What proportion of people without dance fever at that college are women?

A strain of Staphylococcus aureus doubles every 8 hours. A colony of 20000 was cultured in a petri dish for 8 hours. What is the population of the strain after a day?

A dataset has an average of 4/3. There are 50 elements in the dataset. What is the total of the dataset?

The table shows the leading causes of death in a certain country in a recent year. The population of the country was 311311 million. If you lived in a typical city of​ 500,000, how many people would you expect to die of cancercancer each​ year?             Cause Deaths   Cause Deaths   Heart disease 596 comma 700596,700   ​ Alzheimer's disease 84 comma 90084,900   Cancer 575 comma 300575,300   Diabetes 73 comma 40073,400   Chronic respiratory diseases 143 comma 100143,100   ​ Pneumonia/Influenza 53 comma 40053,400   Stroke 128 comma 600128,600   Kidney disease 45 comma 30045,300   Accidents 122 comma 500122,500   Suicide 38 comma 60038,600   About people would be expected to die of cancer each year. ​(Type a whole number. Round to the nearest person as​ needed.)

A small-town mechanic says that 8% his customers come in for an oil change. When 1000 samples were drawn from his records, it was found that 6.5% of these came in for an oil change.i. find the target population?

According to a report published by the center for Disease Control (CDC) in 2011, approximately one in two people with asthma had an asthma attack in2008.