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 brain...

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 brain...

Statistics

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

selectio is replaced before The second is made

a. A highly selective school decides that it will consider only applicants with a score in the top 5%. What will be the minimum score (cutoff point) that you must have in order to be considered for...

In a clinical trial of a cholesterol drug, 352 subjects were given a placebo, and 17 % of them developed headaches. For such randomly selected groups of 352 subjects given...

find the 10th percentile

A university collected Some data of the amount of money That students spent On textbooks and a typical semester Here are the dollar amounts. N=42 Highest number, 447 lowest is 239 ...

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

300 seconds ( 5 minutes)

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?

A manager is about to oversee the mass production of a new tire model in her factory, and she would like to estimate what proportion of these tires will be rejected through quality control. The quality...

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?

According to a New York Times / CBS News poll in June 2012, only about 44% of the American public approves of the job the Supreme Court is doing. This poll included responses of 976 adults. Estimate...

Data was collected on the fat and protien content of burgers sold at a number of fast food restaurants and used to establish the following simple linear regression equation Fat = total fat in grams...

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...

Need to show work. An unknown distribution has a mean of 60 and a standard deviation of 7. A sample size of 85 is drawn randomly from the population. Find the probability that...

I need to know the area under the standard normal curve

Matt wants to determine a 99 percent confidence interval for the true proportion of times he rolls a 3 (using a fair, 6-sided die). How many rolls must Matt make to get a margin of error within .05...

is this a statistics question?