843 Answered Questions for the topic Statistics Question

which type of lottery ticket is purchased the most at a local gas station

is this question statistical

Can anyone answer this question

At a factory that produces pistons for cars, Machine 1 produced 606 satisfactory pistons and 404unsatisfactory pistons today. Machine 2 produced 880 satisfactory pistons and 220 unsatisfactory... more

find the probability

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 175.6-cm and a standard deviation of 1-cm.Find the probability that the length of a randomly... more

For the standard normal distribution, find the area within one standard deviation

For the standard normal distribution, find the area within one standard deviation of the mean that is, the area between μ − σ and μ + σ. Round to four decimal places.   Show complete steps.

Suppose 52 cars start at a car race. In how many ways can top 3 cars finish the race? The number of different top three finishes po

Suppose 52 cars start at a car race. In how many ways can top 3 cars finish the race? The number of different top three finishes possible for this race of 52 cars is

mean question of statistics.

the mass of a group of children are 9,11,13,13,15,15,15,a,18,20. given that the median mass is 0.4 greater than the mean mass, find the value of a and state the modal mass.

please help me !

An anatomy teacher hypothesizes that the final grades in her class are distributed as 10% A's, 23% B's, 45% C's, 14% D's, and 8% F's. If at the end of the semester she has the following grades was... more

A distribution of values is normal with a mean of 225.5 and a standard deviation of 3.2.

A distribution of values is normal with a mean of 225.5 and a standard deviation of 3.2.Find the probability that a randomly selected value is greater than 222.6. P(X > 222.6) = Enter your... more

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 142.7-cm and a standard deviation of 2.2-cm.

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 142.7-cm and a standard deviation of 2.2-cm.Find the probability that the length of a randomly... more

please help me its a statistic question

It has been reported that 60% of all internet users have been attacked by viruses. If 16 people are randomly surveyed, find the following probabilities: a. At least 6 have been attacked b. No... more

It has been reported that 25% of all cars on the highway are traveling at speeds in excess of 70 mph. If the speeds of eight random automobiles are measured v

It has been reported that 25% of all cars on the highway are traveling at speeds in excess of 70 mph. If the speeds of eight random automobiles are measured via radar: a. What is the probability... more

A psychology professor of a large class became curious as to whether the students who turned in tests first scored differently from the overall mean on the test

6. A psychology professor of a large class became curious as to whether the students who turned in tests first scored differently from the overall mean on the test. The overall mean score on the... more

Standard deviation of lifespan

Within a population of 70 flies, the average lifespan is two months. 60 of the flies live an average of 1.5 months. What is the average standard deviation, in months, of the lifespan of the... more

confidence level of a statistical test?

If α = 0.10, what is the confidence level of a statistical test? Based on the α level of the question to the left, whatcritical value is used to form the confidence interval?

Statistics Problem

1) A survey from the Department of Motor Vehicles was given to local residents in the city of Slothville. The results showed that 60% held a valid driver's license. Of the individuals who held a... more

Normal distribution table

What is the time spent waiting on a kidney transplant, using the standard normal distribution table.  THe mean is 1672 and standard deviation is 209.9.  what waiting time represents the 85%  

Statistics question?

A particular group of men have heights with a mean of 171 cm and a standard deviation of 8 cm. Carl had a height of 174cm.?.a. What is the positive difference between Carl's height and the mean? b.... more
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