find the number of applicants with scores less than 100.
Q: The average percent of correct responses on the midterm last semester was 78% with a standard…
A: Given that Mean = M = 78 , Standard deviation = SD = 6 Z-score = 1
Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…
A: The Z-score of is given by, Z-score = Actual Value - MeanStandard Deviation
Q: If a set of data is normally distributed with a mean of 50 and a standard deviation of 5, a z-score…
A:
Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…
A:
Q: The time it takes for a grade 11 students to complete a physical test is normally distributed with a…
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A: From the provided information, Population mean (µ) = 40 hours Sample size (n) = 19 Sample mean (x̅)…
Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 79 beatsminute…
A: Given that population mean = 79 beats/minute population standard deviation = 10 beats/minute
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Q: The mean age of sales ladies in a department store is 30, with a standard deviation of 6. Between…
A: Given that the mean age of sales ladies in a department store is 30, with a standard deviation of…
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: According to a company's website, the top 10% of the candidates who take the entrance test just been…
A: 10% of candidates take entrance test The reported mean and standard deviation is 69 and 8 μ=69σ=8
Q: The average length of time required to complete a college achievement test is approximately normal…
A: Given that Mean =65 Minutes Standard Deviation=11 Minutes
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 mean IQ of 320 college students of a certain university is 100 with a standard deviation of 15.…
A:
Q: The length of a particular animal's pregnancies are approximately normally distributed with mean of…
A: The length of a particular animal's pregnancies are approximately normally distributed with mean of…
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: Suppose the scores of students on an exam are normally distributed with a mean of 337 and a standard…
A: Let X be the random variable from normal distribution with mean (μ) = 337 and standard deviation (σ)…
Q: A review of all records in a large vetinary clinic show that indoor domestic cats at the clinic have…
A: Mean () =15standard deviation () =4sample size (n)= 37
Q: The lengths of a particular animal's pregnancies are approximately normally distributed with mean of…
A:
Q: An original population of scores with a mean = 50 and SD = 6 is standardized to create a new…
A: given data 1 represents original population 2 reperesents new distributionμ1 = 50μ2 = 80σ1 = 6σ2 =…
Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 80…
A: Here we are given that X: healthy adults have pulse rate /minute = population mean =80 beats/minute…
Q: The length of human pregnancies from conception to birth approximates a normal distribution with a…
A: From the provided information, Mean (µ) = 268 Standard deviation (σ) = 17
Q: The scores on a standardized test are normally distributed with a mean of 90 and standard deviation…
A: The test score is 0.6 standard deviations above the mean is obtained below: From the given…
Q: It seems these days that college graduates who are employed full-time work more than 40-hour weeks.…
A: Given data is appropriate for testing of hypothesis to test t-test for single mean. because it is a…
Q: The scores in an intelligent test (IQ test) are known to be normally distributed with a mean of 100…
A: Let X be the score of an IQ test.Given that, X is known to be normally distributed with a mean of…
Q: The time it takes for a grade 11 students to complete a physical test is normally distributed with a…
A: X=the time for Grade 11 students to complete a physical fitness test Given that X follows a normal…
Q: The lifespan of a certain light bulb in (hours) is a Normal model of (400,10) What do the standard…
A: From the provided information, The lifespan of a certain light bulb follows Normal model (400, 10).
Q: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…
A: Assume that adults have IQ scores that are normally distributed with a mean of 100.3 and a standard…
Q: It seems these days that college graduates who are employed full-time work more than 40-hour weeks.…
A: We have to test claim.
Q: A set of final examination grades in an introductory statistics course is normally distributed,…
A: First we will have to calculate the value of Z for both the students, larger the value of z , better…
Q: hs of a particular animal's pregnancies are approximately normally distributed, with mean = 251 days…
A: Consider X be the random variable representing the time span of pregnancies. X follows normal…
Q: Suppose you found out that two job applicants (namely Saif and Sofia) scored 130 and 75 respectively…
A: z score: Consider X as a normally distributed random variable, with mean μ and standard deviation σ.…
Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…
A:
Q: For a population with = 150, a raw score of X = 125 corresponds to z = -2.00. What is the standard…
A: Consider that the mean and standard deviation of a random variable x are µ and σ, respectively.…
Q: Two thousand students took an exam. The scores on this exam are Normally distributed with mean =81…
A:
Q: a sample of 1963 scores was drawn from a normal distribution with a mean of 19.84 and a standard…
A: Given that, μ=19.84,σ=1.918n=1963 Consider that exactly 2.3512% of the distribution of means falls…
Q: Assume that an intelligence test scores are distributed normallt with a mean of 100 and a standard…
A: Standard normal distribution: The standard normal distribution is a special case of normal…
Q: Suppose that pulse rates among healthy adults are normally distributed with a mean of 81…
A:
Q: adult women in the US, the diastolic blood pressure is normally distributed with mean 76 mm Hg and…
A: The z score can be calculated as: z=X-μσn The required z score that is associated with the top 10%…
Q: The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a bell-…
A: Given The number of potholes in any gives 1 mile stretch of freeway pavement in Pennsylvania has a…
Q: A manufacturer of bolts has a quality-control policy that requires it to destroy any bolts that are…
A: Given :Population mean length ( ) = 10 cm.Population standard deviation of length ( ) = 0.05 cm.
Q: An advertising agency that serves a job radio station wants to estimate the mean amount of time that…
A: Here, σ=45, confidence level=90%, E=5.
Q: A food safety guideline is that the mercury in fish should be below 1 part per million (ppm). Listed…
A: The degrees of freedom is, df=n-1=7-1=6 The degrees of freedom is 6. Computation of critical value:…
Q: Suppose that the distance of fly balls hit to the outfield is normally distributed with a mean of…
A: Let X denote the distance of fly balls hit to the outfield is normally distributed with a mean of…
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- The lengths of a particular animal's pregnancies are approximately normally distributed, with mean = 251 days and standard deviation = 12 days. What proportion of pregnancies lasts between 248 and 257 days?Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed with a mean of 260 feet and a standard deviation of 50 feet. We randomly sample 49 fly balls. -Find the 70th percentile of the distribution of the average of 49 fly ballsA recent study found that pregnancy length for single-baby child births is approximately normally distributed with a mean of 266 days and a standard deviation of 16 days. Find the percentage of single-birth babies that will be born at less than 250 days gestation.
- Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the height of a man with a z-score of -2.9 (to 2 decimal places)Suppose the total weight of passengers on a particular flight has a mean of 1499 with standard deviation 128 what is the score of a flight with a total weight of 1639.8In a job fair, 3000 applicants applied for a job. Their mean age was formed to be 28 with a standard deviation of 4 years. Draw a normal curve distribution showing the z scores and the raw scores.
- to qualify for membership in a certain high-IQ society a person must score in the upper 2% of the population on an IQ test. the minimum IQ score to be in the upper 2% is a 140.5 if Iq scores are normanlly distributed with a standrd deviation of 10, what is the mean IQ score?A manufacturer of bolts has a quality control policy that requires it to destroy any bolts that are more than 2 standard deviations from the mean. The quality control engineer knows that the bolts coming off the assembly line have a mean length of 8cm with a standard deviation of 0.05 cm. For what length will a bolt be destroyed?It seems these days that college graduates who are employed full time work more than 40 hour weeks. Data are available that can help us decide if this is true. A survey was recently sent to a group of adults selected at random. There were 22 respondents who were college graduates employed full time. The mean number of hours worked per week by these 22 respondents was 43 hours, with a standard deviation of 8 hours. Assume that the population of hours worked per week by college graduates employed full time is normally distributed with mean. Can we conclude that mean is greater than 40 hours? Use the 0.1 level of significance. Perform a one tailed test, and complete the parts below.
- To qualify for a medical study, an applicant must have systolic blood pressure in the 60% of the middle range. If the systolic blood pressure is normally distributed with a mean of 120 and a standard deviation of 4, find the upper and lower limits of blood pressure a person must have to qualify for the study.Suppose that you are designing an instrument panel for a large industrial machine. The machine requires the person using it to reach 2 feet from a particular position. The reach from this position for adult women is known to have a mean of 2.7 feet with a standard deviation of 0.5. The reach for adult men is known to have a mean of 3.1 feet with a standard deviation of 0.7. Both women's and men's reach from this position is normally distributed. If this design is implemented, (a) what percentage of women will not be able to work on this instrument panel? (b) What percentage of men will not be able to work on this instrument panel? (c) Explain your answers to a person who has never had a course in statistics. Click here to view page 1 of the table. Click here to view page 2 of the table. Click here to view page 3 of the table. Click here to view page 4 of the table.Data from a government agency showed that the mean performance rating of employees is 87% with a standard deviation of 10%. Samples of 50 employees’ record were found to have a mean performance of 83. Based on this data, can we say that the mean performance of those employees were below the average at 0.05 level of significance?
