Find the confidence interval. HELP! best answer 10 points!!?
In a certain manufacturing process, the diameter of holes drilled in a steel plate is a normally distributed random variable. The process standard deviation is known to be σ=0.005 cm.A sample of 15 plates shows a mean hole diameter of 2.475 cm. Find the 95 percent confidence interval for μ.
How is the NSE/BSE Stock open Price determined?
A couple of factors determine the opening price of a stock:1. Demand and supply for a stock (major factor)2. Previous day’s closing price (used as reference point in some cases)Before we move into how the opening price is computed, let’s understand the timeline of the pre-open session.Pre-open sessionPre-open session is a 15-minute long session (9:00 AM to 9:15 AM), which helps in the discovery of opening prices of stocks.It has three parts:Opening priceThe pre-open session begins with intake of orders from market participants. Then, the matching of buy and sell orders is carried out by the stock exchange in order to arrive at the opening price. The opening price, also known as equilibrium price, is computed such that a maximum number of shares get traded based on the buy and sell orders received. This method is known as call auction.I will try to explain the method using an example to make it easy for everyone to understand.So let’s use State Bank of India as an example. Let’s say that SBI closed at 274 in the previous session. In today’s session, the exchange has received multiple orders for the stock and we will consider the below as the order book for SBI at 9:08 AM, which marks the end of the pre-open session.Going by the above order book, we have a single price at which both buy and sell orders can be matched. The equilibrium price for SBI is 275, since this is the price at which maximum number of shares can be matched. Hence, the opening price of SBI will be 275.The above example is a simple scenario. In reality, we may have situations where there is:1. More than one price point with same matched quantity: The opening price will be the price at which the imbalance quantity is the minimum.2. More than one price point with same matched quantity and same imbalance quantity: The opening price will be the price which is nearer to the previous day’s closing price.3. No price discovery in pre-open session: In cases when there is no price discovery in the pre-open session, the price for the first trade in the normal market shall serve as the opening price. This could happen at times when there are no limit orders for a stock and hence opening price would not get discovered.I hope you found the answer useful.
Which test can determine the percentage of blockage in the heart?
Hello, thank you for the question. Echo test or echocardiography is a diagnostic procedure with which you can determine the systolic and dyastolic function of the heart (in layman words: What is the efficiency of the pump). In addition, we can also check the heart valves and can diagnose stenosis or insufficiency. Last but not least, with echo we can see if there is fluid around the heart. These are just few examples what kind of information can echo give us. It is non invasive procedure. This is how heart looks on echo ( LV: left ventricle, RV: right ventricle, RA: right atrium)Unfortunately, with echo we can not determine the degree of coronary artery stenosis. The gold standard for determining coronary artery disease is coronary angiography. This is invasive procedure in which doctor enters the arterial system via femoral artery (the most common way, alternative is radial artery approach). The site of femoral artery puncture. Then doctors inject contrast and proceed catheter to coronary artery. This is how coronary arteries are seen after contrast injection. However, coronary angiography is invasive procedure and if patient is asymptomatic patients treadmill stress test should be considered. Did your father experience some symptoms ? Cardiology Medicine and Healthcare
Is it a standard procedure for an autopsy to determine if a woman has given birth during her lifetime?
Why do stillbirths happen? If you have had a stillbirth or are supporting someone through this difficult experience, you probably are in desperate need of knowing why this happened. An autopsy is normally the best way to diagnose a cause for stillbirth, but this is not always a standard procedure. Inquire about your hospitals procedures when handling stillborn babies and the cause of death. If normal procedure is not to have an autopsy, seek to find out how you can request one, if that’s what you and your family desire http://www.who.int/whosis/mort/verbal_au... http://www.medicinenet.com/autopsy/page2...
How does Snapchat calculate best friends?
Snapchat changed the best friend features when began the launch this speciality. People always surprised about algorithm and so many of snapchat users did not like or understand they did in. But there is not a mind blow condition, that thought is the simple start to understand snapchat algorithm. It is not only enough to send so many snaps or receive. When your receives and sendings reached the optimum degree, the best friend determined for you.Here’s a simple short story to understand the system of snapchat.and the best describe for this topic in the link :How Does Snapchat Choose Your Best Friends List? We Investigated
STATISTICS: Find the minimum score for the top 5%? I got it wrong and want to know how to do it?
On a test of optimism, scores of people diagnosed with a particular disease are normally distributed with a mean of 20 and a standard deviation of 5. a) How high of a score does such a person with this disease need to be among the 5% most optimistic? b) Among the 20% most optimistic? How low of a score to be among the 10% least optimistic? I think I got this wrong because I'm not sure how to handle the deviation and am a bit foggy on the overall process. Please explain the process of solving these two with details (b especially confuses me) so I can make sure to learn, I'm really not sure on a lot and want to do well on the exam. Thanks :)
How do I Find the value of Z is this normal distribution?
***It is extremely difficult to do this by hand, and it is even more extremely rare that you would be expected to do so. Specify what tools you are expected to use (a calculator? a table with values? a computer with internet?) so that answerers can suggest the best/quickest way to get the answer.*** EDIT: new entry Well if you have a graphing calculator (preferably the TI-83 or TI-84), there is a way to use that for this purpose. Otherwise, use the table. let's do a: a.) Find the number z such that the proportion of observations that are less than z in a normal distribution is 0.8. for this problem, look at table 1b, since we're cutting the normal distribution somewhere that contains the majority (more that 0.5) of the distribution. Look at the entries of the table, and get as close as you can to 0.8 If you look at the entry for z = 0.84 (that is, the z= 0.8 row and the .04 column) you find that the proportion is 0.7995, which is pretty close to 0.8. In fact, if you look at the next entry, 0.85, you find that the proportion is now more than 0.8 (in fact, it's 0.8023). What you can conclude is that the value for z that gives you 0.8 is somewhere between 0.84 and 0.85. However, since 0.7995 is pretty close (and is closer to 0.8 than 0.8023), you can simply say that the answer is at z= 0.84 b.) Find the number z such that 35% of all observations from a standard Normal distribution are greater than z. We can use the same table by using the following logic: if 35% of all observations are greater than z, then 65% of all observations are less than z. So, we need to find the entry on table 1b that is as close as we can get to 0.65 Using the same logic as before, we find that the answer is somewhere between 0.38 and 0.39. Choosing the entry which is closer to 0.65, we have z = 0.39 as our answer. Let me know if you want the "graphing calculator" approach to the problem
Can you help me understand these Data Management Q's? (standard deviation, z score, z value)?
Here are 4 questions I am having problems with. The answers are at the back of the book, but I am more concerned with learning the process of how one would write out these answers. I always learned best that way, unfortunately my teacher does not teach that way in this class, so I have had to do much of my learning from the book. These questions are a little too hard for me to understand from the book, so I'd like someone to help me through the process of answering them. I also have one additional question of my own at the bottom of the page. if you don't have time to answer the written questions, the last one is short, about z-scores and z-values, and would be easier to answer than the rest. #1: Marnie is canvassing for the Canadian Institute for the Blind. Using your knowledge of normal distribution, what range of values should Marnie be prepared to accept this year, if the average donation is $75 with a standard deviation of $15. Explain. #2: Researchers have observed that regular smokers have an average lifespan that is normally distributed and is 68 years with a standard deviation of 10 years. What percent of smokers will live beyond age 76? #3: The lifespan of computers is normally distributed. If computer monitors have an average lifespan of 4.8 years with a standard deviation of 1.42 years, and your company bought 45 monitors (which includes 8 extra monitors), how long until you need to buy more? #4: An index for comparing professional hockey players uses the formula below. Rank the following players in order by evaluating their "Q-Value": Q = 2G + A + (PIM/5) Each of these players, I've listed 3 numbers. The values correspond (in this order) to: G, A, PIM. Jerome Iginla: 31, 40, 62 Joe Thornton: 37, 34, 107 Paul Kariya: 33, 34, 20 Joe Sakic: 54, 64, 30 Doug Weight: 25, 65, 91 (G = goals, A = assists, PIM = penalties in minutes) #Z-Score Question: How do you calculate Z-Score and Z-Value from a certain set of data? How do you translate a Z-Score into a Z-Value? Thank you too all those of you who can help!
How do you find the "center" of a histogram?
http://www.itl.nist.gov/div898/handbook/... * The center of a histogram is the location of the data. Literally, it is the "center of the data". "Middle" would not be the correct term to use. * Basically, the maker of the histogram compiles studied data that is placed on a graph in a way that best describes its purpose. See the section below listing some of the different types of histograms. For this reason, you are technically NOT finding the center of the histogram. You are instead "determining" your own center of the histogram in the way you deem fit to present your data. I guess the actual question would be "What type of histogram distribution is best for me to use?" ~~~~~~~~ * Note the words and phrases that are all caps for highlighting. http://www.skymark.com/resources/tools/h... Section titled "Center of a Distribution" "Processes have A TARGET VALUE, the value that the process should be producing, where most output of the process should fall. THE CENTER of the distribution in a histogram SHOULD, in most cases, FALL on or NEAR THIS target VALUE. If it does not, the process will often need to be adjusted so that the center will hit the target value." * Other types of distributions across a horizontal and vertical graph: 1. Standard normal distribution: this one has a very tall "center" amidst one "process". The process is the hill-like structuring of the bars in the histogram. 2. Skewed distribution 3. Double-peaked curve distribution: this center separated two "distinct" processes 3. Truncated distribution 4. Plateau-like curve distribution 5. Outlying distribution ~~~~~~~~ DETERMINING THE CENTER Section titled "Specification Limits and Batch Performance" * For a standard normal distribution (looking at the graph), there is a very noticeable center denoted by what is called a "target value". This value is separated by a lower and an upper "specification limit", which appears to be merely based on criteria you "specify". The very central bar of the distribution is called the "aim of the process". * Note that the target value is not on a bar but a line drawn, as are the specification limits, and can be located within a bar because they conform not to each bar of data, but the graph in which they are placed. ~~~~~~~~ Best of luck!