In a study of 250 adults the average heart rate was 70 bpm assume the population of heart rate is known to be approximately normal with a standard deviation of 12 bpm what does a margin of error of two for the 98% confidence interval of the average beats per minute mean

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

Now, martin can reasonably guess that the standard deviation for the entire population of people at the mall during the time of the survey is $1.50. what is the 95% confidence interval about the sample mean? interpret what this means in the context of the situation where 95 people were surveyed and the sample mean is $8. use the information in this resource to construct the confidence interval.