hmacey85 hmacey85

14-04-2024
Mathematics

Answered

60 students were asked how long it took them to travel to school. Their travel times are normally distributed with a mean of 20 minutes and a standard deviation of 5 minutes.Find the expected number of students who took between 15 and 25 minutes to travel to school.

Answer :

Other Questions

The amount of time a certain brand of light bulb lasts is normally distributed with a mean of 1400 hours and a standard deviation of 70 hours. Using the empiric

The waiting times for an elevator are normally distributed with a mean of 1 minute and a standard deviation of 20 seconds. Find the probability that a person wa

The lengths of lumber a machine cuts are normally distributed with a mean of 9999 inches and a standard deviation of 0.40.4 inch. (a) What is the probability t

A student leaves home which is 2 km from the nearest point to the main road (very long driveway). She wants to walk to school which is 4km along the main road (

A population consist of five numbers 3,6,9,15,27 consider all possible Samples of size two which can be drawn with replacement from this population ind a) the m

7.3.4 In a study of parents' perceptions of their children's size, researchers Kaufman et al. (Current Biology, 2013) asked parents to estimate their youngest c

use the list of scores below to completee a freuency table and a histogram displaying the grade students received on their science fair project. 66, 89, 93, 81,

A researcher was interested in whether different proportions of students and professors wear vs. do not wear glasses. She collected a sample of 524 students and

Estimate to the nearest whole number, the number of vertical cross sections needed to equal the area of the base of the figure to the right. Explain how you mad

[Complex analysis] How to prove this: Let A subset of C and z0 in A. If z0 is an accumulation point of A, then a function f:A to C is continuous in z0 if, and o