863 Answered Questions for the topic Statistics Question

Statistics Question

03/11/18

is it possible for eight employees to earn between $300 and $350 while the ninth earns $1250 per week, and the mean be $430?

need help with this ... math really isn't my thing but I have to have it for masters in nursing 
Statistics Question

03/11/18

What is the cost to rent a trailer for 3.6 ​hours?

The charge to rent a trailer is $2020 for up to 2 hours plus $6 per additional hour or portion of an hour. Find the cost to rent a trailer for 3.6 hours, 4 hours, and 7.2 hours. 
Statistics Question

03/09/18

There are 136 passengers on a plane. 78 of them are women. 21 of them are men who purchased non-refundable tickets.

There are 136 passengers on a plane. 78 of them are women. 21 of them are men who purchased non-refundable tickets. 1) If you put the names of all the passengers in hat and then drew two names... more
Statistics Question Standard Deviation

03/08/18

The weight of a sperm whale’s brain is normally distributed with a mean of 15.5 pounds and a standard deviation of 3.6 pounds.

The weight of a sperm whale’s brain is normally distributed with a mean of 15.5 pounds and a standard deviation of 3.6 pounds. What is the probability a randomly selected sperm whale will have a... more
Statistics Question

03/07/18

Please Help with Statistics

A recent estimate of Congress’ approval rating was 17%. What sample size does this estimate suggest we should use for a margin of error of 0.04 with 95% confidence?
Statistics Question

03/06/18

Think of a simple random sample X1,...,X5 following the distribution N(mu,sigma^2). Show that the statistic W=(X1+4X4-2X5)/3 is an unbiased estimator of mu.

Also: What distribution does W follow? Specify the mean and variance.
Statistics Question

03/03/18

Assume the random variable X is normally​ distributed, with mean equals 60 and standard deviation equals 9. Find the 10 th percentile.

find the 10th percentile  
Statistics Question

02/28/18

When Joe plays a board game with his four sisters, any one of the five players is equally likely to win.

They decide to play the game repeatedly until Joe wins a game, and then they will stop. Assuming that the outcomes are independent, what is the probability that they play at least three games?
Statistics Question

02/23/18

what is the area under the standard normal curve between z=−2.9 and z=0.28?

 I need to know the area under the standard normal curve 
Statistics Question

02/20/18

How much did your classmates typically spend on game downloads last year

is this a statistics question?
Statistics Question

02/20/18

How many 3-digit number with no repeated digits using 4, 5, 6, 7, 8 can be a) less than 520; b) greater than 600; greater than 5000?

Solve the following problems. Write the formula, give, solution and final answer. 
Statistics Question Math Statistics

02/18/18

Give your answers as decimals, to two places

You measure 37 textbooks' weights, and find they have a mean weight of 64 ounces. Assume the population standard deviation is 5.8 ounces. Based on this, construct a 90% confidence interval for the... more
Statistics Question Statistics Normal Distribution

02/18/18

read the description . I need work and an explanation

Tom and Jan are planning on applying to attend KSU. Tom takes the ACT while Jan decides to take the SAT. The mean score on the ACT is a 17 with a standard deviation of 5, and the SAT mean score is... more
Statistics Question Statistics

02/18/18

How many different ways can the officers be appointed?

A corporation must appoint a president, cheif exectuive officer (CEO), cheif operating officer (COO), and cheif financial officer (CFO). It must also appoint a planning committee with five... more
Statistics Question

02/17/18

please help solve, confused

Assume that a procedure yields a binomial distribution with 2 trials and a probability of success of 0.50. Use a binomial probability table to find the probability that the number of successes is... more
Statistics Question

02/07/18

If the bookstore stocks 86 copies of the magazine, for what percentage of weeks will there be an insufficient number of copies to meet demand?

i need help on this problem. It's for statistics
Statistics Question

02/05/18

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

is this question statistical
Statistics Question

02/04/18

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
Statistics Question

02/02/18

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
Statistics Question Statistics Stats

02/01/18

Stats Hw Question

The authors of the paper "Fudging the Numbers: Distributing Chocolate Influences Student Evaluations of an Undergraduate Course"† carried out a study to see if events unrelated to an undergraduate... more
Statistics Question

01/26/18

Is this biased or not biased and why....What is your favorite soft drink? Sample is chosen by picking names out of a telephone book.

I say unbiased but my cousin says biased so I am lost

01/23/18

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.
Statistics Question

01/21/18

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

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