there are 300,000 people review for the movie pupulation mean is 7.2 stars and standard deviation is 1.1 stars how many viewers gave less than 5 star review to this movie
Q: What is the probability that a first grade classroom of 20 students who are chosen randomly from the…
A: Given Information: Mean μ=100 Standard deviation σ=15 Sample size n=20
Q: (d) Find the p-value. (Round to three or more decimal places.) (e) Can we conclude that the mean IQ…
A: Given that Sample size n =21 Sample mean =115 Standard deviation=11
Q: Suppose weights of the checked baggage of airline passengers follow a nearly normal distribution…
A: Let X be the random variable from normal distribution with mean (μ) = 45 pounds and standard…
Q: Women's heights are normally distributed with mean 63.8in and standard deviation 2.6in. The U.S.…
A: Given that the men heights are normally distributed with mean 69.5 in and standard deviation 2.4…
Q: A teacher wanted to know how well the gifted studentsin here class perform relative to her other…
A: Given Hypothesis Ho: mu=50 vs H1: mu> 50 n=31, Xbar=55, sigma= 10
Q: A sample obtained from a population with a standard deviation of 12 has a standard error of two…
A: Given information- Population standard deviation σ = 12 The standard error (SE) = 2 We have to find…
Q: The results of a common standardized test used in psychology research is designed so that the…
A: The Z-score can be calculated as: Where, x = raw value µ = mean σ = standard deviation
Q: Describe about the mean absolute deviation.
A:
Q: The class mean for the exam was 82 with a standard deviation of 6. There are 37 students in the…
A: We have given that, Mean = 82 , standard deviation σ = 6 sample size n = 37 Standard error of the…
Q: A professor want to estimate the mean weight of 1 specific cookie. How many people must he sample…
A: Given, Margin error (E) = 0.6 Standard deviation = 1 The objective is to find the sample.…
Q: The results of a common standardized test used in psychology research is designed so that the…
A:
Q: The results of a common standardized test used in psychology research is designed so that the…
A: Z-score = (X-mean)/Standard deviation Put given values in formula : Given information : Mean =…
Q: The results of a common standardized test used in psychology research is designed so that the…
A: Given that, Mean = 130 Standard deviation = 20 Raw score = 156
Q: Sketch a picture of this situation. Label and scale the horizontal axis and shade the region(s)…
A: n1 = 29n2 = 16 x1 = 4x2 =5 s1 = 0.7s2 = 1.1
Q: The results of a common standardized test used in psychology research is designed so that the…
A: It is given that the mean and standard deviation are 145 and 30.
Q: An IQ test has a mean of 97 and standard deviation of 10. Which is more unusual, an IQ of 87 or an…
A: Given data μ = 97σ = 10which score is more unusual? 87 or 110?
Q: The results of a common standardized test used in psychology research is designed so that the…
A:
Q: According to a medical journal, the distribution of weights of newborn babies is approximately…
A: The objective of this question is to find the percentage of newborn babies that weigh between 3100…
Q: The gestation period for human births can be taken as normally distributed with a mean of 256 days…
A: Given: The gestation period for human births can be taken as normally distributed with a mean of 256…
Q: When Noah goes bowling, his scores are normally distributed with a mean of 135 and a standard…
A: Let X be the Noah goes bowling, his scores are normally distributed mean μ=135, standard deviations…
Q: The results of a common standardized test used in psychology research is designed so that the…
A: Givenmean(μ)=135standard deviation(σ)=40
Q: is 80 a suspect outlier
A: Here given, One indicator of an outlier is that an observation is more than 2.5 standard deviations…
Q: The results of a common standardized test used in psychology research is designed so that the…
A: Given,mean(μ)=170standard deviation(σ)=10A raw score(X)=198
Q: The results of a common standardized test used in psychology research is designed so that the…
A: Consider X be a random variable which follows normal distribution indicating the score earned on a…
Q: What is the probability that you can cover a 540 square feet area using 20 cans of spray paint…
A:
Q: Pyramid Lake is en the Paiute andan Reservation in Nevada. The lake is famous for cuthreat trout.…
A: a) Assume that μ is the true mean length of trout caught in Lake P.
Q: If a set of numbers has a standard deviation of zero, what can you say about the numbers?
A: The standard deviation indicates that amount of deviation of data points from the mean.
Q: If the main effect of age is significant, describe the main effect of age. Include the overall means…
A: Main effect in the Analysis of Variance test is the effect of one the independent variable on…
Q: A set of math test scores has a mean of 70 and a standard deviation of 8. A set of English test…
A: Consider that the mean and standard deviation of a random variable x are µ and σ, respectively.…
Q: student a received a score of 91 on a test whose scores had a mean of 82 and a standard deviation of…
A: Given data,For Student AMean μ=82sd σ=6Score is x=91For Student BMean μ=80sd σ=4Score is…
Q: The cholesterol levels of a group of young women at a university are normally distributed, with a…
A: Given μ=190σ=37 Let X: Random variable for the cholesterol level of young women Then X~N(190,372)
Q: The results of a common standardized test used in psychology research is designed so that the…
A: Given Data; x¯=165σ=50x=145
Q: The results of a common standardized test used in psychology research is designed so that the…
A: Let us define a random variable x denoting test score used in psychology research which has;…
Q: Raul received a score of 75 on a history test for which the class mean was 70 with a standard…
A: The z value for score of 75 on a history test is,
Q: The results of a common standardized test used in psychology research is designed so that the…
A: Given: μ=105σ=20 The z-score for the raw score 99 is obtained as below: z=x-μσ=99-10520=-620=-0.3…
Q: The standard error of the mean serves as a special type of standard deviation. Describe about it.
A: Standard error: Standard error is a measure which explains how accurate are the sample means to…
Q: The length of the western rattlesnake is normally distributed with a mean of 42 inches and a…
A: Determine the length of the snakes that the 95% of western rattlesnakes that are longer than. The…
Q: The mean total serum cholesterol level in women free of cardiovascular disease is 205 with a…
A: The independent variable is total serum cholesterol level in women free of cardiovascular disease.…
Q: A particular fruit's weights are normally distributed, with a mean of 689 grams and a standard…
A: Solution: Let X be the particular fruit’s weight. From the given information, X follows normal…
Q: The results of a common standardized test used in psychology research is designed so that the…
A: Given Data: x¯=160σ=30 x=127
Q: The results of a common standardized test used in psychology research is designed so that the…
A: Formula for z-score is,
there are 300,000 people review for the movie
pupulation mean is 7.2 stars and standard deviation is 1.1 stars
how many viewers gave less than 5 star review to this movie
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- A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what percentage of students spend less than 12 hours in class?A researcher believes the mean weight of male turtles is more than 205 pounds, she samples 18 male turtles and finds their mean to be 216.2 pounds with a standard deviation of 13.5 pounds. Find the P valueThe results of a common standardized test used in psychology research is designed so that the population mean is 100 and the standard deviation is 20. A subject earns a score of 84. What is the z-score for this raw score?z-score =
- What percent of the students received a score below 64, if the mean grade on a test was 70 and the standard deviation was 6. For the same test results as prob 1), what percent of studen ts scored between 64 and 80 .If the number of degrees of freedom for a chi-square distribution is 32, Determine the population mean and standard deviation. Please explain how you derived the answerTwo thousand students took an exam. The scores on this exam are Normally distributed with mean =81 points and standard deviation =15 points. Then the middle 50% of the exam scores are between what two values?
- The results of a common standardized test used in psychology research is designed so that the population mean is 175 and the standard deviation is 20. A subject earns a score of 227. What is the z-score for this raw score? Do not round your answer.z-score = ?An incoming MBA student took placement exams in economics and mathematics. In economics, she scored 84 and in math 88. The overall results on the economics exam had a mean of 72 and a standard deviation of 10, while the mean math score was 65, with a standard deviation of 11. On which exam did she do better compared with the other students? Since she scored ? standard deviations above the mean in economics and ? standard deviations above the mean in mathematics, she did better on the mathematics exam. (Round to two decimal places as needed.)Raul received a score of 77 on a history test for which the class mean was 70 with a standard deviation of 9. He received a score of 75 on a biology test for which the class mean was 70 with standard deviation 4. On which test did he do better relative to the rest of the class
- The results of a common standardized test used in psychology research is designed so that the population mean is 155 and the standard deviation is 30. A subject earns a score of 194. What is the z-score for this raw score?z-score =Marjorie More Mileage is obsessed with getting the best gas mileage possible for her 2017 Toyota Prius. She learns from the official Toyota web site that the official average mileage for all 2017 Prius is = 58.2 mpg with a standard deviation of = 1.2 mpg. Marjorie purchased a set of “hyper mileage” tires on-line that are supposed to improve gas mileage. For the next 100 fill ups, Marjorie noticed an average gas mileage of = 58.5 mpg. Help Marjorie perform a hypothesis test at a 1% level of significance to determine if her new tires actually improved her gas mileage. What is the null hypothesis? What is the alternate hypothesis? Is this a left tail, right tail, or two tail test? Calculate the test statistic. State your conclusion.A placement test for the state university freshmen has a normal distribution with a mean of 700 and a standard deviation of 30 the bottom 4percent of students must take a summer session. What is the minimum score you would need to stay out of this group?
