scores on a test are being normally distrubuted. mean 73.0 standard deviation 5.0. 100 students were tested. how many students scored between 68 and 78? how many students scored below 63?...
scores on a test are being normally distrubuted. mean 73.0 standard deviation 5.0. 100 students were tested. how many students scored between 68 and 78? how many students scored below 63?...
A new Rassmussen Report national telephone survey finds that just 32% of American adults favor "sin taxes" on soda and junk food. The survey was based on a sample of 1,000 Americans adults...
The length of time what a space rocket component functions is approximately normally distributed. A sample of 20 of these components showed a mean of 900hours with a standard deviation of 87 hours...
The production manager of a bottling plant has acquired new machines to fill beverage cans. The machines are used to fill 16 ounce cans. If the filling machine is working properly, the mean fill volume...
To estimate the mean score μ of those who took the Medical College Admission Test on your campus, you will obtain the scores of an SRS of students. From published information you know that the scores...
The mean weight of loads of rock is 43.0 tons with a standard deviation of 12.0 tons. If 16 loads are chosen at random for a weight check, we wish to compute the probability that the mean weight of...
The mean weight of loads of rock is 43.0 tons with a standard deviation of 12.0 tons. If 16 loads are chosen at random for a weight check, we wish to compute the probability that the mean weight of...
What is the IQ score of the person at the 79th percentile? I got 81 but I don't know if I'm doing it right
What percent of students scored greater than 410?
A production system with five production lines produces thousands of items per day. From past experience it is known that one out of every 10 products coming out of each production line is defective...
Question 1 The mean weight of loads of rock is 43.0 tons with a standard deviation of 12.0 tons. If 16 loads are chosen at random for a weight check, we wish to compute the probability that...
Question/Problem: Data Set 1 in Appendix B lists the white blood cell counts (1000 cells/µL) of 40 randomly selected women. The mean of those 40 values is 7.15 and the standard deviation...
Answer must be rounded to the nearest tenth. A. 2.3 B. 2.1 C. 2.9 D. -2
Suppose that replacement times for washing machines are normally distributed with a mean of 10 years and a standard deviation of 1.4 years. Find the replacement time that separates the top 18% from...
Suppose that the mean height of 10th grade boys is 69 inches with a standard deviation of 2 inches and that it follows a normal distribution. Using the empirical rule, determine the percentage of...
Suppose Company G produces packages of key rings that are normally distributed with a mean of 51.6 individual key rings and a standard deviation of 1.3 key rings. Company H produces packages of key...
a manufacturing company claims that the mean life of a battery is 3000 hrs and the standard deviation is 250hrs. what % of batteries will last for more than 2500 & 4000 hrs?
The following data, heartbeats per minute, was collected for a group of 10 men subjected to a stressful situation. 120, 122, 124, 127, 127, 133, 140, 141, 142, 144 1. What is the...
Two thousand students appeared in an examination. Distribution of marks is assumed to be normal with mean U=30 and standard deviation = 6.25. How many students are expected to get marks between 1...
In a particular city, 40% of high school graduates go to college upon graduation. Suppose that we take repeated random samples, each of 300 high school graduates from that city, and made a...