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Q1. The signs on an elevator states "Maximum Capacity 1,140 Kilogram" or 16 persons". If the mean weight is 75 kilos and the standard deviation of the weight is 10 kilos, What is the probability that a sample of 16 persons would weigh more than 1140 kilos.
Q2. A factory's worker productivity is normally distributed. One worker (worker 1) pro- duces an average of 75 units per day with a standard deviation of 20. Another worker (worker 2) produces at an average rate of 65 per day with a standard deviation of 21. What is the probability that during one week (5 working days) worker 1 will produce more than worker 2?
Q3. The long-distance calls made by the employees ofa company are normally distributed with a mean of6.3 minutes and a standard deviation of 2.2 minutes. How long do the longest 10% of calls last
Q4. A certain type of tomato seed germinates 90% of the time. A backyard farmer planted 25 seeds.
a. What is the probability that exactly 20 germinate?b. What is the probability that 20 or more germinate?
Suppose that the null hypothesis is rejected and alternate hypothesis is accepted. Discuss the conclusion as a Type I error, a Type II error, or a correct decision, if in fact the defendant is innocent.
A clinical study was performed to determine if a product was effective in alleviating side effects caused by a mode of treatment. In the treated group (100 subjects) it was found that 10% had side effect A, 15% had side effect B and 65% had side eff..
MATH1550H: Assignment: Question: A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..
the following data represent the costs in dollars of a sample of 30 postal mailings by a
You and 100 of your 200 respondents concerned about nutrition. Is this reason to believe that the percent in your area is higher than the national 40%?
A researcher conducts an experiment comparing two treatment conditions and obtains data with 10 scores for each treatment condition.
Test claim that mean responses are same for all populations of patients receiving either treatment and of either gender.
Find the probability taht exactly 6 are satisifed with the airlines. Find the probability that fewer than 4 are satisfied with the airlines. Find the probability that 5 or more are satisfied with the airlines. Find the probability that between 3 a..
Suppose 1.5 percent of the antennas on new Nokia cell phones are defective. For a random sample of 200 antennas, find the probability that:
A manager of a supermarket estimated that 87% of customers use coupons in their grocery purchases. How large a sample is required to estimate the true proportion to within 0.01 with 98% confidence?
This question has to do with power. Suppose in a clinical study you have two groups with 10 subjcects in each group. No significance at the .05 level is found but there is a medium effect size, which is judged to be of practical significance. What sh..
Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed, but they want the average to be 10 or below.
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