Now the following problems are quantile problems which ask for values of x on the x-axis for which certain probabilities are true. Make sure you draw bell curves and shade in regions just like the procedure I showed you in class to solve the following problems. Suppose that Z ~.
Of all of the students that purchase a sports pass, only 75% attend one or more home basketball game using their pass. Of these, 10% will attend all the home games. If the coach were to walk around campus and talk to 25 students who have a sports pass, what.
Of 1000 randomly selected cases of lung cancer, 838 resulted in death within 10 years. Construct a 95% two-sided confidence interval on the death rate from lung cancer.
(a) Construct a 95% two-sided confidence interval on the death rate from lung cancer. Round your answers to 3.
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normal distribution
A certain bank in the country has a client charter that says among other things the waiting time for its customers before been attended to should not be more than 5 minutes. On a particular busy morning, the waiting times for its customers were recorded.
Of all Americans, 49% would choose democrats, 38% would choose republicans, and 13% would be undecided. Using the following line of random digits
3547655972394216585004266354354374211937
Simulate the results of a poll of 20 people at random, and state how many of the 20 chose democrats..
Numbers 5 through 8 deal with a five-card poker hand from a standard 52-card deck. How many royal flushes are possible? How many four-of-a-kinds? How many "full houses" of Kings and sevens? How many "full houses"?.
Outside a home, there is an 8-key keypad with letters A, B, C, D, E, F, G and H that can be used to open the garage if the correct eight-letter code is entered. Each key may be used only once. How many codes are possible? The number of possible.
Of the 15 players on a basketball team, six play guard, six play forward, and tree play center. How many starting lineups can be formed from 15 players? (as lineup has two guards, two forwards, and one center) P(A) = 0.61 P(B) = 0.39 P(AUB) = 0.75 P(A B) =.
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Need help to write this clinincal research !!
write the descrtiption of the study, variables in data set, data and research question and hypothesis, summary statistics and frequency table,
Case study : a study enrolling 24 patients diasnosed with keratitis sicca (KCS) was conducted.
Of 26,492 births, 869 male and 642 female infants were born with birth defects. What is the ratio of male to female infants with birth defects? ? What is the rate of babies born with birth defects?.
of cups of coffee that students drank per day in order to get through their We use our class as a sample from out to be 1.78 to 4.85. Which of the following is a correct interpretation of this confidence interval we are 95% confident that the true population mean.
Number of partners in six accounting firms A survey of six accounting firms in the capital Region Great Lakes mid-atlantic, and Northest regions included the number of partners in the firm This information is included in the data table below. Complete(a) and (b) below At the 0.05 level of significance.
Need help with this open ended-question:
Consider a 10,000 square-foot green house in Portland, OR to be used to produce cucumbers and tomatoes. Develop a preliminary, basic design for the required irrigation system. Consider the following:
The amount and the cost of water needed.
O H5 points scalc7 9.4.008 nva (a) use the fact that the population was 250 million in 1990 (t to formulate a logistic model for the us popula rate, and t is the time in years since 1990.) P(t) (b) Determine the value of k in your model by using.
Of 250 high school freshmen, 55 are in the marching band and 135 are female. Furthermore, 29 are in the marching band and female. If one of these freshmen is chosen at random, what is the probability that they are in the marching band or female? Leave your answer as.
PART 1 Given: x = 63, Sx = 12, n =100. Construct a confidence interval of x according to:
(a) C = .95
(b) C = .99
PART 2 Repeat parts (a) and (b) of PART 1, but with the condition.
Over a 2-year period, researchers retrospectively recruited 26 European women with previous gestational diabetes from West London antenatal databases. One of the measurements was the fasting nonesterified fatty acids concentration (NEFA) measured in mu mol/L. In the sample of 26 women, the mean NEFA level was 435 mu mol/L with.
o one of the following, as appropriate. (a) find the critical value za/2, (b) find the critical value ta/2 (c) state that neither the normal nor the t distribution applies. Confidence level 90%; n = 22; o is known; population appears to be very skewed. A. za/2 = 1.645 B.
O Here are measurements (in millimeters) of a critical dimension on a random sample of auto engine crankshafts 223,989 224,089 223,960 224.120 224,001 224.017 224.057 223 913 223,999 223 976 223.902 223.980 224.0980 223.987 The data come from a production process that is known to have a standard deviation o.
Of 75 convicted criminals, 22 were sentenced for burglary, 34 were sentenced for armed
robbery, and 19 were sentenced for theft.
What proportion of the criminals was sentenced for burglary?
What percentage of the criminals was not sentenced for armed robbery?
.
Over a period of 90 days the numbers of emergency admissions to a hospital can be summarized as shown below. Does this data fit a Poisson distribution?
Number of admissions in a day Number of days this number of emergency admissions occurred
0 .
Number of white blocks - 12 Number of gray blocks - 13 Total number of blocks - 25 Dimensions of outside square? Number of white blocks - 40 Number of gray blocks - 41 Total number of blocks - 81 Dimensions of outside square?
Number of white.
Over the past 5 years, the mean time for a warehouse to fill a buyer's order has been 25 minutes. Officials of the company believe that the length of time has increased recently, either due to a change in the workforce or due to a change in customer purchasing policies..
Of 248 adults who tried a new multi-grain cereal, "Wow!", 158 rated it excellent; of 97 children sampled, 89 rated it excellent. What is the pooled proportion?
.
Of 530 broiler chickens purchased from various kinds of food stores in different regions of a country and tested for types of bacteria that cause food-borne illnesses, 35% were infectedwith a particular bacterium.
a) Construct a 99% confidence interval..
Over three decades ago, four businesspeople who had experience in retailing natural foods through food stores believed that there was a demand for a supermarket for natural foods. As a result, in 1980 in Austin, Texas, they founded the first Whole Foods Market store in a building that had around.
O b. false. Andrew Lara sells new cars forLiberty Buick. Andrew usually sells the largest number of Buicks on Saturday He has the following probability distribution for the number of cars he expects to sell on a particular Saturday: oca probability of .1.1 cars probability of 2,2 cars probability of.
Of all the employees in a company, 69 percent are male, 37 percent hold managerial duties, and 29 percent are male and hold managerial duties. Suppose that you select one employee at random from this company. When asked for a number in these questions, enter an expression involving the data.
Of patients going to a primary care physicians (PCPs) office, 30% are referred to a specialist, 40% require lab work, and 35% require neither lab work nor a referral to a specialist.
(a) Determine the probability that a visit to a PCPs office results in both lab.
nozzles are often used for flow-metering device that you have to design a truncated nozzle, or a series nozzles, to measure the perform of an air compressor. The compressor is rated at 0.05 m^3/s (Standard conditions) at 830 kPa. A performance curve for the compressor would be a plot of.
Occasionally, warning flares of the type contained in most automobile emergency kits fail to ignite. A consumer advocacy group wants to investigate a claim against a manufacturer of flares brought by a person who claims that the proportion of defective flares is much higher than the value of .1 claimed.
OA Yes, data do The ages of a group of patients being treated at one hospital for osteoporosis are summarized in the frequency hitogra below Based onthe histogram, is a large samle necessary tocondud ah poten about te mean agente why Frequenry 600 not appear to be normally dictibuted bu.
Outline the step-by-step procedure you would use to select the following: a. A random sample of 275 students from your university b. A quota sample of fifty light users and fifty heavy users of a beer in a shopping mall intercept study c. A sample of regular Twitter users to.
Of 118 randomly selected adults, 34 were found to have high blood pressure. Construct a 95% confidence interval for the true percentage of all adults that have high blood pressure. Construct a confidence interval for the population proportion p..
Need help solving
Survey showed that on average, adults sleep 6.9 hours per night. suppose that the standard deviation is 1 hours.
Use Chebyshev’s theorem to calculate the percentage of individuals who sleep between 4.9 and 8.9 hours.
Use the Chebyshev’s.
o lir A medical researcher wants to test whether there is a connection between smoking and heart disease based on the at which heart disease is first detected. Some 75 smokers are matched with 75 non smokers according to age, lifestyle, medical history, sex, etc. After taking the sample the.
Of men aged 65 and over 20.5% are still in the U.S. labor force. A random sample of 120 retired male teachers indicated that 38 were still working. Use both a confidence interval and a hypothesis test. Test the claim that the proportion is greater than 20.5% at alpha equal.
Obtain the linear correlation coefficient for the data. Round your answer to three decimal places. SHOW ALL WORK
X: 33.1, 26.6, 46.2, 23.6, 35.3
Y: 3, 10, 2, 2, 4
A) -0.392
B) 0.349
C).
Outliers: We know many types of data fall into a normal distribution with most of the observations falling toward the middle. However, sometimes data are outliers or data that are very different -larger or smaller- from the rest of the members of the sample. Think of an example in the.
Of 75 people with cell phones, 42 take pictures with their cell phone and 36 use their cell phone to take pictures and send text messages. How many use their phones to send text messages?.
