If it is known that the percentage of successful students is 75%, and you take a sample of 15 students, calculate 1. The probability of having 10 successful bears 2. The probability of success of more than 13 students 3. variance

Q: Two groups of students reported mean weights of 162 kgs and 148 kgs respectively. When would the…

A:

Q: The mean weight of an adult is 62 kilograms with a variance of 144. If 195 adults are randomly…

A: Population mean=M=62 Population variance=S2=144 Population standard deviation=√S2=√144=12 Sample…

Q: A racing car is one of the many toys manufactured by Mack Corporation. The assembly times for this…

A: Mean()=55standard deviation()=4The company closes at 5 P.M every day

Q: We would like to compare samples from two different populations A and B. The means of these two…

A: Given that, MuA= 200 MuB= 200 Var(A) = 72 Var(B) = 200 Sample size, nA = 36  nb= 100 We've to find…

Q: 80% of a patient with a certain disease will be successfully treated with a new medical treatment.…

A: According to the given information, We have Probability = 80%=0.80Sample size = 40

Q: r = .393, n = 48, p < .05, two-tails Interpret this finding in a short sentence as you would find…

A: It is given that the value of r is 0.393.

Q: If the Mean of a data set is 700 and the Variance is 49; Calculate the intervals used for the…

A: Given information, Mean of a data set = 700 Variance = 49 We have to calculate intervals using…

Q: A student takes a multiple choice exam with 10 questions, each with four possible selections for the…

A: Given that, A student takes a multiple choice exam with 10 questions, each with four possible…

Q: need answer for expected value

A: It is an important part of statistics. It is widely used.

Q: Suppose when a data set with 32 values is treated as a "population", the value of the (population)…

A: Given that  Population Variance = 145.2  n = 32

Q: find the mean, variance, and standard deviation   Twenty-one percent of U.S. employees who are late…

A: The value of mean is 0.84, which is obtained as follows:

Q: Suppose that you draw a random sample from a population where you know the population mean is 36 and…

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Q: L What measure should you use to determine what most likely be the probability of an event to…

A: 1. For determining the most likely be the probability of an event to happen is the variance of…

Q: When you have a certain blood test done, the phlebotomist takes 3 vials of blood that hold 10 mL…

A: (a) Given five selected data are,9.61, 9.65, 9.68, 9.81, 9.93(b) Given five selected data are,454,…

Q: Give conditional variance.

A:

Q: If 50 and 70 are the two elements of a population data set and their z-scores are -2 and 3,…

A: For  X=50, Y=70  Z score= -2 and 3 for point X and Y

Q: Jessica hypothesizes that giraffes will look longer at human infants than at adults. In her zoo, she…

A: It is given that Jessica hypothesizes that giraffes will look longer at human infants than at adults…

Q: If it is known that the percentage of successful students is 75%, and you take a sample of 15…

A: Givenp=0.75n=15Let "x" be the no.of successful bears x~Binomial(n=15,p=0.75)P(X=x)=(nx)(p)x(1-p)n-x…

Q: The average time it takes a music producer to complete a recording of a pop song is 53.4 minutes.…

A: Let X be the random variable from normal distribution with mean (μ) = 53.4, variance (σ2) = 49 the…

Q: One sample has n = 5 scores and M = 10. A second sample has n = 20 scores and M = 5. If the two…

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Q: One sample with n=4 scores has a mean of 12, and a second sample with n=6 scores has a mean of 8.…

A: Given information Sample 1 n1 = 4, µ1= 12 Sample 2 n2 = 6, µ2= 8

Q: A researcher calculates the variance of her sample to be s = -6. , what would you tell the…

A: Here's the explanation for this as follows; The sample variance, s², is used to calculate how varied…

Q: Marcos took the EnggMath3 exam decided to guess on a 10-item multiple choice. Each problem has 5…

A: # x be the no of answers correct follow binomial distribution (n=10, p=1/5)  1): then to find…

Q: r-.393, n 48, p <.05, two-tails Interpret this finding in a short sentence as you would find it in a…

A: Given  r=0.393 n=48 p&lt;0.05 two tails

Q: In a random sample of 1000 B.Com students, 125 said that they wanted to become Statisticians. Assume…

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Q: The scores in a high school are normally distributed with a variance of 225. Suppose that 27.43% of…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: ls. Find the mean, variance and

A: To find: 1).Mean 2).Variance 3).Standard deviation

Q: A researcher is trying to determine if racial background affects income. In a sample of 100 people,…

A: From the above data What proportion of the variance in income can be explained by racial background…

Q: Assume you did an experiment with 3 groups and 16 subjects per group. The sample variances in the…

A: It is given that, an experiment with 3 groups and 16 subjects in per group. Thus,

Q: Suppose that you have obtained data by taking a random sample from a population. Before performing a…

A: For a random sample that is selected from a population, the following steps have to be done in order…

Q: 3. Suppose that you randomly picked 100 iPhones and calculated the average battery life for these…

A: The objective is to guess the average battery life of 100 iPhones.

Q: find the mean, variance, and standard deviation  36% of likely U.S. voters think that the federal…

A: The value of mean is 2.16, which is obtained as follows:

Q: Solve the problem. 15) The probability that a person has immunity to a particular disease is 0.7.…

A: The mean number of people who have immunity in samples of size 22 can be calculated using the…

Q: If 2% of the components produced by a machine are defective. What is the variance of the number of…

A: According to the question, Number of components, n=300 Probability to be defective p =0.02

Q: Suppose it is known that 37% of Camp Crystal Lake campers return the next summer. A random sample of…

A: Given: 37% of the campers return next summer. p=0.37 n=15

Q: You play a game of chance that you can either win or lose (there are no other possibilities) until…

A: Probability of losing (p) the game is 0.61 Probability of winning the game = 1- p = 1- 0.61=0.39

Q: Two samples are randomly selected from a population. One sample has n = 5 and the second has n = 30.…

A: In this case, there are two samples. One sample has size of n = 5 and another has size of n = 30.

Q: A surgery has a success rate of 90%. Suppose that the surgery is performed on three patients. Graph…

A: p=probability=0.9, n=3 =sample size

Q: If it is known that the percentage of successful students is 75%, and you take a sample of 15…

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Q: A sample has a minimum value of 7 and a maximum value of 58 .Estimate its variance.

A: We have to find variance...