a normal distribution has a mean of 100 with standard deviation of 20. If one score is randomly selected from this distribution, what is the probability that the score will have a value between x=90...

a normal distribution has a mean of 100 with standard deviation of 20. If one score is randomly selected from this distribution, what is the probability that the score will have a value between x=90...

If in a video game there is a 1/50 chance a monster will drop an item once killed, aren't the odds of it taking 171 kills greater than a smaller amount around like 50 kills? I understand there is...

The rowan (Sorbus aucuparia) is a tree that grows in a wide range of altitudes. To study how the tree adapts to its varying habitats, researchers collected twigs with attached buds from 12 trees...

TV ratings- A broadcast gets a 4.6 rating from markets comprising 65% of the population. The broadcast's final rating when 100% of the markets report in is 3.2. What rating did the broadcast get in...

A pizzeria has six meat toppings and nine vegetable toppings

billy has 15 min to get to his after-school job. Despite his best efforts, he is frequently late. His employer says that unless he arrives to work on time consistently, he will lose his job. He has...

There are nine raincoats in size 6-8 on sale in the girl's department at Bloomingdale's. Three have tulips, four have bunnies, and two have hearts. Mack is in a rush and randomly chooses two raincoats...

A spinner has three equal areas (colored yellow, pink, and green). Joe spins the spinner three times. What is the probability of getting 'green' on all three spins? a.1/81 b.1/27 c...

Its a golf question, par is 74 and standard deviation is 6. I already made the normal curve and showed the 68 - 95 - 99.7 rule. Need to know how many shots about 95% of golfers took.

A) Skewedness B) Outliers C) Symmetry D) Centerness

Person A has a z-score of -3 and is on her phone for 7 hours a day. Person B has a z-score of -4 and is on her phone for 3 hours a day. It is a normal distribution. What would be the mean of the data...

Which county had the highest median income between 2006 to 2010? The answer is Los Angeles. I have a real data, how do I turn this question to a hypothesis and which test do I use?

You are running a Major-League Baseball team. Your analyst tells you that based on her analysis, the number of games a team wins is related to the average salary the owner pays to the players. The...

How many ways can 6 balls be put into 4 boxes? What formula is used to solve?

I read that once a population reaches 25% of a certain trait or ideal (in human populations) that it will increase exponentially after that, is this true and is there a name for this increase?

A simple random sample of women aged 18-24 is selected, and the systolic blood pressure of each woman is measured. The results (in mmHg) are as follows: = 120.7, s = 14.7. The sample size is less...

The lengths of metal bolts produced by a machine are found to be normally distributed with a mean of 19.8 cm and a standard deviation of 0.3 cm. There are some concerns that there is a fault...

A random sample is selected of working adults living in CAlgary, Canada. They were asked how long, in minutes is their typical daily commute. The resulting sample mean was 28.5 minutes and the resulting...

On a(n) 25-problem test, how many ways can a person get 8 problems correct and 17 problems wrong?

It is estimated that 80% all twenty-year-old men have weights ranging from 140 to 150 lb. Assuming the weight distribution can be adequately modeled by a normal distribution with mean 145 lb and standard...