Doctors suspect a strain of bacteria found in the hospital is becoming resistant to antibiotics. They put various concentrations of antibiotic in petri dishes and add some of the bacteria to allow it to grow. The bacteria grow into groups in the dish called colonies. After some time, the doctors return to the petri dishes and count the number of colonies for the different amounts of antibiotic. The data is plotted with a best fit line. The correlation coefficient was r = -0.83

1) What does the sign of correlation coefficient (r=-0.83) tell you about the relationship between the number of bacteria colonies and the concentration of antibiotic in the dish?
2) What does the numerical value of the correlation coefficient (r=-0.83) tell you about the relationship between the number of bacteria colonies and the concentration of antibiotic in the dish?
3) In a follow-up study, a group of scientists collect data that was fit by a linear model with a correlation coefficient of r=-0.94. Which study suggests a stronger relationship between the number of bacteria colonies and the concentration of antibioticthe doctors' study or the scientists' study?

What’s the range cuz i can’t find it?

Listed below are time intervals (min) between eruptions of a geyser. assume that the "recent" times are within the past few years, the "past" times are from around 20 years ago, and that the two samples are independent simple random samples selected from normally distributed populations. do not assume that the population standard deviations are equal. does it appear that the mean time interval has changed? is the conclusion affected by whether the significance level is 0.10 or 0.01? recent 78 90 90 79 57 101 62 87 71 87 81 84 57 80 74 103 62 past 88 89 93 94 65 85 85 92 87 91 89 91 follow the steps of hypothesis testing, including identifying the alternative and null hypothesis, calculating the test statistic, finding the p-value, and making a conclusions about the null hypothesis and a final conclusion that addresses the original claim. use a significance level of 0.10. is the conclusion affected by whether the significance level is 0.10 or 0.01? answer choices below: a) yes, the conclusion is affected by the significance level because h0 is rejected when the significance level is 0.01 but is not rejected when the significance level is 0.10. b) no, the conclusion is not affected by the significance level because h0 is not rejected regardless of whether a significance level of 0.10 or 0.01 is used. c) yes, the conclusion is affected by the significance level because h0 is rejected when the significance level is 0.10 but is not rejected when the significance level is 0.01. d) no, the conclusion is not affected by the significance level because h0 is rejected regardless of whether a significance level of 0.10 or 0.01 is used.

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read