In a Random sample of 80 adults, the average number of messages received in a day was 50 with a standard deviation of 20. What is the 95% confidence interval for the average number of messages received by all adults daily?

The american academy of pediatrics wants to conduct a survey of recently graduated family practitioners to assess why they did not choose pediatrics for their specialization. provide a definition of the population, suggest a sampling frame, and indicate the appropriate sampling unit.

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.