Statistics - math word problems - page 27 of 46
Number of problems found: 920
- Middle number puzzle
In the middle between the unknown number and the number 166 is the number a) 164, b) 200, c) 500 d) 1356 What are the unknown numbers? - IQ Intelligence quotient
Intelligence quotient (IQ) is a standardized score used as the output of standardized intelligence psychological tests to quantify a person's intelligence with the rest of the population (respectively, to a given group). Intelligence has an approximately - Aircraft 14
An aircraft is to arrive according to the flight schedule at 10:15 a.m. Statistics state that out of 100 aircraft on average 10 land between 10:00 and 10:15, 40 between 10:15 and 10:30, 30 land between 10:30 and 11:00, 10 between 11:00 and 12:00, and 10 a - Coordinates of a centroind
Let A = [3, 2, 0], B = [1, -2, 4], and C = [1, 1, 1] be 3 points in space. Calculate the coordinates of the centroid of △ABC (the intersection of the medians). - Doctor 2
A doctor noted the Diastolic Blood Pressure (DBP) of a large number of patients. Later, he scrambled the data to keep the privacy of his patients. Based on the scrambled dataset, he finds that the lower inner fence is equal to 50 and the upper inner fence - House numbering
The residential house has three entrances, numbered even numbers, successively immediately behind. The sum of the two numbers on the outside entrances is 68. Calculate the middle of these three numbers. - Report card
Ivor received grade 5 a total of 4 times at the beginning of the school year. How many times must he now receive grade 1 to achieve grade 2 on the report card? - Company car
Ms. Vankova has a company car equipped with a multifunction indicator to monitor the average petrol consumption during individual rides. During the first ride, mostly in city traffic, it traveled 20.5 km, with an average consumption of 7.8 L/100 km. In th - Rescuing people
Ultron from the Avengers film trapped on a ship 1 000 miles from the mainland 3 600 innocent people. Iron Man would rescue them one by one in an hour and 25 minutes, Ant-Man would manage it in 43 minutes and 20 seconds. Both heroes, however, joined forces - Dice six probability
We were tasked with throwing the dice until we hit the "six." a) Find the average number of throws we will have to make to complete the task. b) How many times do we have to roll the dice so that the probability of falling at least one "six" is at least 9 - Kamal
Kamal walks to his school, which is 3 km from his home, in 30 minutes. On reaching, he finds that the school is closed and comes back by bicycle with his friend and reaches home in 20 minutes. His average speed in km/h is - Twenty
Twenty swallows sit on a 10 m long telephone cable. Assume that swallows are completely randomly distributed along the line. (a) What is the probability that more than three swallows sit on a randomly selected section of cable 1 m long? (b) What is the pr - Hyperbola
Find the equation of hyperbola that passes through the point M [30; 24] and has focal points at F1 [0; 4 sqrt 6], F2 [0; -4 sqrt 6]. - From peanuts
From peanuts priced at 160 CZK/kg and almonds priced at 200 CZK/kg, 20 kg of a nut mixture priced at 190 CZK/kg is to be prepared. The price of the mixture is determined by the ratio in which the nuts are mixed. a) Determine how many kilograms of each typ - Positive integers
Several positive integers are written on the paper. Michaella only remembered that each number was half the sum of all the other numbers. How many numbers could be written on paper? - Timetable 2
A train runs on a regular schedule from city A to city B, 270 km away, in 3 hours. On Monday, the train left city A 18 minutes late, but arrived in city B on schedule. By how many km/h was the average speed of the train on Monday higher than the scheduled - Number arithmetic mean
The number 20 is the arithmetic mean of the eight numbers. Determine their sum. - Chocolate candy mixture
Three different types of chocolate candies at the price of 18 CZK, 24 CZK, and 20 CZK per 10 dag (formerly mass unit - dkg). How much will CZK cost for 1 kg of mixture mixed in a ratio of 1:5:4? - Car speeds
The distance from Nitra to Ostrava is 257 km. From both places, two cars drove towards each other at the same time. The car from Nitra drove 800 m/h slower than the car from Ostrava. What was the average speed of each car if they met after 150 minutes of - Ball bearings
One bearing is selected from the shipment of ball bearings. It is known from previous deliveries that the inner bearing radius can be considered a normal N distribution (µ = 0.400, σ2 = 25.10^−6). Calculate the probability that the selected radius will ex
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