Samuel F.B. Morse (1791 – 1872), the creator of Morse Code, claimed that 12% of all letters used in the English language were “e”s.  Suppose random samples of 196 letters are selected from a book. Use this information to answer questions  What is the probability that a random sample of 196 letters will contain at least 10% "e"s? Type your calculated z-score here. Express its value to the nearest hundredth (two decimal places)______ Type your probability here. Express its value to four decimal places._________

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Q: A geneticist conducts an experiment with beans, one sample of offspring consisted of 457 green beans…

A: Given,no.of green beans=457no.of yellow beans=164Total no.of beans=621

Q: he distribution of heights of adult males has a mean of 69 inches and a standard deviation of 4…

A: Solution-: Let, X= The distribution of heights of adult males Given: (inches) We find, P[ he…

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Q: If you lived in a typical U.S. city of 500,000, how many people would you expect to die of a stroke…

A: Introduction: The total number of deaths due to the causes listed in Table 7.5 is calculated below:…

Q: A data set is formed by recording the sums in 400 rolls of a pair of a dice. A second data set is…

A: Standard deviation:The standard deviation indicates by how much each observation differs from a…

Q: 9% of all cars fail the emissions inspection, find the probability that in a sample of 125 cars, 16…

A: Given n=125 P=0.09

Q: 95% of 80 freshman history students scored between 70% and 80% on a take home quiz. If this data is…

A: Given,  n=80 α= (1-0.95) =0.05 Let X denote the score of freshmen. As per t-distribution table, the…

Q: Find the mean, variance, and standard deviation for the number of heads when 13 coins are tossed.…

A: Given :  This is a binomial experiment n = 13 p is the probability of success that means getting…

Q: A geneticist conducts an experiment with beans, one sample of offspring consisted of 449 green beans…

A:

Q: A recent study investigated tractor skidding distances along a road in a forest. The skidding…

A: In the given case the null hypothesis is claiming the mean value to be more than or equal to 425.

Q: The weights of 1,000 children average 50kg and the standard deviation is 5kg. How many children…

A: Given  mu=50, sigma=sd=5, n=1000 We want to find How many children weigh between 40kg and 55 kg?

Q: A baseball team has 31 players, 8 of whom bat left-handed. Suppose that the manager of this team is…

A: A baseball team has 31 players, 8 of whom bat left-handed. Suppose that the manager of this team is…

Q: the data set has a size 50, how many observations lie within 2 standard deviations of the mean

A: From the provided information, Sample size (n) = 50 The observations lie within 2 standard…

Q: A geneticist conducts an experiment with beans, one sample of offspring consisted of 455 green beans…

A: Solution-; Given: Number of green beans =455           Number of yellow beans =141           Total…

Q: If a probability or 2 place decimal like area is found to be 077 or - 1.09 0.4377, what is the z…

A:

Q: If the probability of defective bolt is 0.1, find the mean and the standard deviation for the number…

A: Given the probability of a defective bolt is, 0.1 That is, p=0.1 The total number of bolts is, n=400…

Q: A population has a stand. dev. of 24. on average, how much difference should there be between the…

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Q: If you change the a level from .05 to .01, does the probability of making a Type I error increase,…

A: According to the given information in this questionWe need to identify the correct option

Q: Suppose a probability and statistics class took an exam that had a mean of 60 and a standard…

A: Given, E(X)=60 SD(X)=12   After 10 Point curve Let Y be new variable.

Q: The length of human pregnancies is approximately normal with mean u = 266 days and standard…

A: (d) The sample distribution of sample mean is,

Q: Schnitzler syndrome has an incidence rate of 9%. It is found that 92% of people suffering from…

A: Given problem Given that

Q: What is the probability that the sample mean tax is between 7600 8000

A:

Q: Dandelions are studied for their effects on crop production and lawn growth. In one region, the mean…

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Q: What is the most frequent number of over-the-limit items for this data set? ans = What is the…

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Q: At their​ inauguration, the ages of the first six​ (out of a current number of​ 45) presidents of a…

A: Given : The ages of first six presidents : 65 , 57 , 63 , 50 , 57 , 55 The mean of the most recent…

Q: The IQ score that separates the bottom 15% from the top 85% is P,5 =. (Round to the nearest…

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Q: A sample of ?=25 observations is drawn from a normal population with ?=1080 and ?=210. Find each of…

A: Solution-: Given: We find, (A) (B) (C)

Q: About 7% of the population has a particular genetic mutation. 200 people are randomly selected. Find…

A: Sample size (n) = 200P(genetic mutation) = p = 0.07X = Number of people with genetic mutationMean of…

Q: A sample of 38 people are taken who who owns a red pair of shows. The std is 23 with an unlnown mean…

A: To determine the probability of making a type II error and the power, we need to know the level of…

Q: In company XYZ, the success of an email to land into a spam folder is 4%. If an account received 20…

A: Solution To find the probability we will use Excel  Given data is  n= 20

Q: 92% of the largest colleges and universities (more than 15,000 total enrollments) have some online…

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Q: The mean of childhood asthma prevalence in 43 cities is 2.32%. A random sample of 32 of these cities…

A: Given : mean = μ = 2.32% S.D = σ =1.30% Sample size = n = 32 PX¯>2.8 =1-PX¯≤2.8 PX¯ >2.8…

Q: Five hundred children participated in a field demonstration. Their heights averaged 110cm with a…

A:

Q: The probability that a patient recovers from a delicate heart operation is 60%. There are 20…

A: Given data: Probability  = p = 0.60 Sample size (n) = 20 To find: What is the mean and standard…

Q: The Powerball lottery jackpot has a winning probability of 1/189,000,000.  If you only consider the…

A: From the given information, Consider, X is the random variable that shows the net gain.  Pr(winning…

Q: The events are approximately independent because 0.700 = 0.700.  The events are not independent…

A: Two events, A and B, are independent ifP(A and B) = P(A) x P(B)We can then rearrange this…

Q: A researcher believes there is a difference in the mean number of days before visible results begin…

A: let's set up the null hypothesis and alternative hypothesis null hypothesis: there is no difference…