n order to write an exam, a student needs an alarm clock to wake up, which has proven to successfully wake him 80% of the time. If he hears the alarm in the morning the probability of writing the test is 0.9 and if he doesn't hear the alarm the probab

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A: Mean()=2000standard deviation()=100sample size(n)=20

Q: The probability distribution of x, the number of defective tires on a randomly selected automobile…

A: We have given the following probability distribution table.x01234P(x)0.560.160.070.040.17

Q: A flooring company sells carpet by the metre off of a standard sized roll. The mean amount of carpet…

A: As per our guidelines we are supposed to answer only one question kindly post the remaining question…

Q: Determine the margin of error for the confidence interval for the proportion: 0.545 <p<0.878 The…

A: The given data is as follows:The confidence interval of proportion is The objective is to compute…

Q: She obtains the accompanying data Complete parts (a) through (d) below (a) Venty that the data are…

A: The given data is 11.94, 11.74, 12.25, 11.32, 11.85, 11.86, 11.59, 12.15, 11.76, 11.55, 12.31, 12.59

Q: Suppose we are interested in studying a population to estimate its mean. The population is normal…

A:

Q: A survey of 2282 adults in a certain large country aged 18 and older conducted by a reputable…

A: The question is about confidence interval.Given :No. of adults in a survey ( n ) = 2282No. of adults…

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A: It is given that the 60% of all Americans live in cities with more than 100,000 populations.The…

Q: Imagine you have a bag containing 5 red, 3 blue and 2 orange chips. If drawing without replacement,…

A: Total balls = 10Red balls = 5 Blue balls = 3Orange balls = 2Yellow balls = 0

Q: The average THC content of marijuana sold on the street is 10%. Suppose the THC content is normally…

A: The distribution of THC content is normal. The mean is 10% and the standard deviation is 2%.

Q: Assume that a sample is used to estimate a population proportion p. Find the 99.5% confidence…

A: sample size n=101number of successes= 70

Q: Section 1. Suppose that you are a wildlife biologist studying morphological characteristics of sea…

A: The mean of the distribution is cm. The standard deviation of the distribution is  cmThe sample…

Q: d) Use Excel to find the total number of recorded offences between 2013/14 and 2022/23. Write the…

A: The data on the number of shoplifting offences in England and Wales by category is given in the…

Q: A researcher wanted to test the hypothesis that, "There is a significant difference between the mean…

A: This is a problem of hypothesis as one sample t - test ( as population standard deviation σ is…

Q: fied couples who have two or more personality preferences in common. Let, proportion of all married…

A: Given information:Sample 1:- Sample size (): 388- Couples with two or more personality preferences…

Q: Assume that private preschool costs in the city are normally distributed. The average amount that…

A: We are given that,

Q: An article in the Washington Post on March 16, 1993 stated that nearly 45 percent of all Americans…

A: The null and alternative hypothesisH0:p=0.45Ha:p0.45sample size(n)=80x=30sample proportion()=

Q: True or False? “Fatalities from car accidents in Bowe County will decrease among children aged 1 and…

A: Given Information:Statement: "Fatalities from car accidents in Bowe County will decrease among…

Q: . Circle all of the comments that describe the Central Limit Theorem a) If the parent population is…

A: Let's go through each of the comments and provide explanations:(a) If the parent population is…

Q: Private nonprofit four-year colleges charge, on average, $27,915 per year in tuition and fees. The…

A: For the normally distributed college charge, it is given that:The mean charge (in $), μ=27915.The…

Q: Determine the cardinality of each of the following sets, including an explanation of the process for…

A: A denote the subset group 1 and Ac denote the subset not in group 1 and B denote the subset group 2…

Q: For any probability density function, what value is always the total area under the curve? Choose…

A: For any probability density function , total area under curve = ?

Q: The data represent the​ time, in​ minutes, spent reading a political blog in a day. Construct a…

A: The data set is 38, 15, 6, 25, 44, 49, 1, 45, 47, 47, 42, 28, 19, 43, 38, 10, 1, 24, 0, 44.The…

Q: 2. Here are data from an experiment studying the effect of relaxation training on stress. Stress is…

A: It is required to compute Fobt, create a bar graph showing group means, and test for any significant…

Q: The number of hours that students studied for final exams was normally distributed. Of the 200…

A: It is given that Mean = 12Std. deviation = 3Note: According to Bartleby expert guidelines, we can…

Q: Find the critical values X1-α/2 and x for a 90% confidence level and a sample size of n = 15. x/2…

A: The confidence level is 90% and the sample size is 15.

Q: A doctor wants to estimate the mean HDL cholesterol of all 20- to 29-year-old females. How many…

A: The question is about sample size estimation.Given :Standard deviation found from earlier studies (…

Q: Consider the following table containing the betting spreads and actual spreads from 15 randomly…

A: The given data is as follows: Betting vs Actual…

Q: A roulette wheel has 38 slots, of which 18 are red, 18 are black, and 2 are green. In each round of…

A: Given the roulette wheel has 38 slots, of which 18 are red, 18 are black and 2 are green.p=P(rounds…

Q: he manager of a computer retail store is concerned that his suppliers have been giving him laptop…

A: Let denotes the mean replacement time which follows normal distribution. The mean is 3.6 years,…

Q: Obesity Obesity is defined as a body mass index (BMI) of 30 kg/m" or more. A 99% confidence interval…

A: The given confidence interval is 19.5% to 21.7%.We have to construct 99% confidence interval.This is…

Q: Suppose that Use the ALEKS calculator to answer the following. follows a chi-square distribution…

A: Given thatdegrees of freedom=18

Q: Question 4 Nintendo collected data on the heights of a sample of Animal Crossing: New Horizons…

A: The histogram depicts the heights of a sample of Animal crossing.

Q: Assume that people spend 30 percent of their income on food, 45 percent on housing, and 25 percent…

A: We have given the 30 percent of their income on food, 45 percent on housing, and 25 percent on…

Q: A statistic center compiles data on the length of stay by patients in​ short-term hospitals. A…

A: Let X denote the length of stay by patients in​ short-term hospitals.Given the…

Q: Does support for assisted suicide (“death with dignity”) vary by social class? Is this relationship…

A: Given the data asMexicoLower ClassWorking ClassMiddle ClassUpper…

Q: Out of 67,410 surgeries tracked in a study in the U.K., 2832 were followed by surgical site…

A: Given informationWe have given that out of 67,410 surgeries tracked in a study in the U.K., 2832…

Q: The following data represent the pH of rain for a random sample of 12 rain dates. A normal…

A: Let the variable X indicates the pH value of rain on 12 different dates.The given values of X are,…

Q: A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

A: Mean()=148.4standard deviation()=2.3sample size(n)=16

Q: a. Determine the shape of the distribution pictured below and the measure of center that should be…

A: The histogram of the data is given below.To identify the shape of the distribution and best measure…

Q: Assume that private preschool costs in the city are normally distributed. The average amount that…

A: The given data is as follows:Population mean, Population standard deviation, Sample size,

Q: Suppose a sample of size 20 is pulled from a population of 1,000,000. Further, suppose that the…

A: The question is about central limit theorem.Given :No. of sample that are pulled from the population…

Q: A normal distribution has a mean of 35 and a standard deviation of 4. Find the probability that a…

A:

Q: Suppose six pet food stores in the area were surveyed, and the following data shows how many types…

A: The given data is 7, 7, 9, 9, 11, 11.

Q: which alternative hypothesis is appropriate for this test. Ο HA: μι # μ2,t*= -2.021 Ο HA: μι <…

A: The sample size for left-handed is 41 and the sample size for right-handed is 41.

Q: A sociologist is studying the prevalence of crime in one major city. In a sample of 200 randomly…

A: Sample size n=200Favorable cases x=58Sample proportion p^=x/n=58/200=0.29

Q: The population of healthy female adults, the mean red blood cell count (RBC) is 4.8 (millions of…

A: It is needed to find whether the given scenario is an example of Type 1 Error, Type 2 Error, No…

Q: 2. Iron bars produced by a machine can either be classified as "Good" with probability p, or "Bad"…

A: Given that the iron bars produced by a machine can either be classified as "Good" with probability,…

Q: In a city a meteorologist finds that the under certain atmospheric conditions, rain resulted 81…

A: Given,In a city a meteorologist finds that the under certain atmospheric conditions, rain resulted…

Q: Why do I (your professor) not use the pooled proportions when testing for zero difference?   A)…

A: We are asked to explain why we do not use the pooled proportion when testing for zero difference.We…