Y3/ In chemistry experiment seven students oblained the followng percentage of dhloride in asample of pure Sodium chloride : 60.65 , 60. 68 , 60.70 60.6o , 60.64 60.65 and 6o.67 . Find Hhe Average deviation of Hhe percentage of chloride:
Q: 7. (10 pts) The average salary of women in America is $41,000, with a stan- dard deviation of…
A: Given that The average salary of women in America is $41,000 with standard deviation of $8000 Mean…
Q: After hundreds of samples, you have determined that the mean and standard deviation of the iron…
A: The question is about continuous probability distribution.Given :Mean of the iron content in a…
Q: A normal distribution has a mean of u = 18 with o= 4. Find score (X) needed to be in the bottom 29%…
A:
Q: A student made three measurements of the mass of an object using a balance (± 0.01 g) and obtained…
A: Given Data: Measure # 1 4.39 ± 0.01 g Measure # 2 4.42 ± 0.01 g Measure # 3 4.41 ± 0.01 g
Q: As a group, the Dutch are among the tallest people in the world. The average Dutch man is 184 cm…
A: Empirical rule of probability:- Approx. 99.7% of the data lies between ± 3 SD limit of mean μ ±3…
Q: A survey collected data from a random sample of 121 people living in Jade city. The sample average…
A: It is given that the sample mean is 23.28.Using the given information, the standard error of the…
Q: The mean yearly rainfall in Sydney, Australia, is about 137 mm and the standard deviation is about…
A: The mean is 137 and the standard deviation is 69.
Q: For a set of 400 urine protein measurements, the mean was found to be 61.6 mg/day with a standard…
A:
Q: The following figure is a normal curve that represents the approximate weights, in pounds, of adult…
A:
Q: The main temperature in Dallas in July for Dallas Texas is 85° assuming a normal distribution what…
A: Let us denote X=the temperature in Dallas in July X follows a normal distribution with mean= 85 and…
Q: Suppose 4, and 42 are true mean stopping distances at 50 mph for cars of a certain type equipped…
A: From the given information, the pooled variance…
Q: H0:μ=58.455 H1:μ>58.455 Your sample consists of 46 subjects, with a mean of 58.8 and standard…
A: The random variable X is normally distributed. The sign of alternative hypothesis is greater than,…
Q: systolic blood pressure (given in millimeters) of males has an approximately normal distribution…
A: Given: Population mean μ=125 Population standard deviation σ=14 Let X be normal distribution. X ~…
Q: 40 residents on their floor, she determines the values of x and y (in minutes). It obtains the…
A:
Q: Airlines for America (A4A) report that a family of four planning to travel over the holiday break…
A: Solution:- From given information Mean μ=3500 Standard deviation σ=750 Assume that the amount spent…
Q: On your first exam, the average score was a 76% and the standard deviation was 4%. Assume that the…
A: Solution: Let X be the score. From the given information, X follows normal distribution with mean…
Q: I researched the winning time for the 1/4 mile race in the Fayette County Fair. Let's assume that…
A: Given The winning times are normally distributed for both men and women. Let X be the winning times…
Q: The diameters of red delicious apples of an orchard have a normal distribution with a mean of 3…
A: Let x be the continuous random variable and it said to follows normal distribution with mean μ and…
Q: A normal distribution has u = 30 and o = 5. (a) Find the z score corresponding to x = 25. (b) Find…
A:
Q: The mean value of the weight of product X is normally distributed with average (0.297 kg) and…
A: Given,The mean value of the weight of product X is normally distributed with average (μ) = 0.297 kg…
Q: Assuming that the samples come from normal distrib of error E given the following: п3D 10, X. 28, s=…
A: Given, a.) n=10 q21 s=4.0 c=90% b.) n=16 s=4.2 c=95%
Q: Pv. Don't provide handwriting solution
A: Given:mean µ=70standard deviation σ=5number of students who took an intermediate level Statistic…
Q: A normal distribution has mean μ = 60 and standard deviation σ = 20. Find and interpret the z-score…
A: Step 1: State the given data: raw score, x = 75population mean, µ = 60population standard deviation,…
Q: Q3) Following are the observation showing output in tons per week of 8 manufacturing industries.…
A: In the given information the observation showing outputs in tone per week of 8 manufacturing…
Q: On an exam with a mean of M=39, you obtain a score of X=35. Would you prefer a standard deviation…
A: Given that, Mean M =39 X=35, prefer a standard deviation of s= 2 or s=8:
Q: In a test of Ho: µ = 30 against Ha: µ> 30, the sample data yielded the test statistic z = 1.85. Find…
A: Given : Population mean = 30 z - value = 1.85
Q: The probability a student has blue eyes is p. Five students are selected at random. Write down, in…
A: It was stated that the probability that a student has blue eyes is p. Five students are selected at…
Q: To determine whether car ownership affects a student's academic achievement, random samples of 100…
A: It is assumed that the population variances are not equal.
Q: make a normal curve for this p= (x/n) (100) = (17/19) (100) = 89.47
A: The following information is provided in the question n = 19 p = 0.8947 We know, When X follows…
Q: the mean is 146, and standard deviation is 35. A score of 181 is how many z-scores above the mean?
A:
Q: The mean and standard deviation for the exam results from a class of 135 students were calculated,…
A: Given,The mean and standard deviation for the exam results from a class of 135 students were…
Q: The following figure is a normal curve that represents the approximate weights, in pounds, of adult…
A: In question, We have given a normal curve then we'll find the following probabilities. The solution…
Q: Cherry trees in a certain orchard have heights that are normally distributed with mean u = 112…
A: (A) To determine the proportion of cherry trees that are more than 120 inches tall in an orchard…
Q: Find the equation of the normal line to ,61 y=531 at y= 1- x=e In 5 y= -x - -+ 1 2 In 5 y=-x+ 2 O y=…
A:
Q: A distribution is given as X~U (2,10). What is the 75th percentile? What is the 40th percentile?…
A: It is given that the X follows Uniform distribution with a as 2 and b as 10. X ~ U (2, 10).
Q: lustration 17.25. The income distribution of a group of 10,000 persons was found to be normal with…
A:
Q: The distribution of scores on the SAT is approximately normal with a mean of m = 500 and an SD of s…
A: Given: Mean (m) = 500, SD (s) = 100 Let X is the scores on the SAT which is normally distributed.
Q: Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores…
A: The z-score:The z-score of a normally distributed random variable, X, with mean μ and standard…
Q: For SRSWOR (N,n), find the ratio estimator of population mean. Show that the estimator is biased
A: Given information: The population size is N. The sample size is n. The sample is selected using…
Q: 4. Which proportion of a normal distribution is located between the mean and z = +1.40? 5. A…
A: The proportion of a standard normal distribution which is located between mean and z = 1.40 is given…
Q: In the experiment, you repeated measurements 13 times for a resistor. After data processing, you…
A:
Q: (b) Find the critical value(s). Select the correct choice below and fill in the answer box within…
A:
Q: The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?
A:
Q: The police reported that the average driver exceeds the 50 miles per hour speed limit by more than 9…
A: For an assumed sample, the z-score Z=x¯-μσnwhere, x¯=sample mean μ=population mean…
Step by step
Solved in 2 steps with 1 images
- For healthy young women average level of calcium in blood is 9.5 mg per deciliter with the typical standard deviation of 0.4 mg/dl. In a rurah hospital in Guatemala for 160 healthy women on early stages of pregnancy blood calcium level was measured; the average was 9.57 mg/dl. Does the average level differ from 9.5? Calculate the p-value, round it up to 4 decimal places.The histogram of the number of hours of sleep Stat 100 students reported getting each night roughly follows the normal curve with an average of 7.0 hours and a SD of 1.2 hours. a. Approximately 68% of the students sleep between hours and hot (Put the smaller number first) 提交答案|Tries 0/5 b. Approximately 95% of the students sleep between hours and hours. (Put the smaller number first) 提交答案| Tries 0/5 c. If a student sleeps 5.2 hours per night what percent of the people sleep more than her? Do the problem in steps: I. First, find the Z score = 提交答案|Tries 0/3 ii. Now, move the red vertical line on the following graph to the correct Z score by clicking and dragging the mouse. If you are using a touch screen, touch and then slide the region around the vertical line 1.00 Shade the region representing the percent of people who sleep more than her: Shade the region under the normal curve to the O left of the red vertical line O right of the red vertical lineThe one in the yellow is the previous tab.
- Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an advance indication of illness such as gout, leukemia, or lymphoma.+ Over a period months, an adult male patient has taken five blood tests for uric acid. The mean concentration was x = 5.34 mg/dl. The distribution of uric acid in healthy adult males can be assumed to be normal, with σ = 1.83 mg/dl. (a) Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error? (Round your answers to two decimal places.) lower limit upper limit margin of error (b) What conditions are necessary for your calculations? (Select all that apply.) Oo is unknown O uniform distribution of uric acid F σ is known O normal distribution of uric acid On is large (c) Interpret your results in the context of this problem. O The probability that this interval contains the true average uric acid level for this patient is 0.05. O The probability that…Pulse rates of adult men are approximately normal with a mean of 70 and a standard deviation of 8. Which choice correctly describes how to find the proportion of men that have a pulse rate greater than 78? (a) Find the area to the right of z = -1 under a standard normal curve. (b) Find the area to the right of z=1 under a standard normal curve. (c) Find the area to the left of z = 1 under a standard normal curve. (d) Find the area between z=-1 and z=1 under a standard normal curve. (e) None of the aboveA normal distribution has a mean of μ = 50 and a standard deviation of σ =12. Find the proportion of the distribution located in the tail for X = 53.
- lustration 19.33. An examination was given to 50 students at College A and to 60 students at Collage B. At A, the mean grade was 75 with S.D.=9. At B, the mean was 79 with SD=7. Is there a significant difference in the performance at the two Colleges at 5% level of significance?Find the value of za/2 when 1- a = .98. Explain your answer by using the standard normal curve.= 222 mg/dLi and Total cholesterol levels for middle aged men (aged 55 – 64) follow approximately a normal distribution with mean, µ standard deviation, o = 37 mg/dLi. Those with a total cholesterol of 240 mg/dLi or higher have "high" cholesterol (and have twice the risk of coronary heart disease as someone with a total cholesterol less than 200 mg/dLi) Find the Z-score (standard score) for an observation of 290 mg/dl.
- Newspaper Reading Times A survey taken several years ago found that the average time a person spent reading the local daily newspaper was 10.8 minutes. The standard deviation of the population was 3 minutes. To see whether the average time had changed since the newspaper's format was revised, the newspaper editor surveyed 40 individuals. The average time that the 40 people spent reading the paper was 12.4 minutes. At α=0.10 , is there a change in the average time an individual spends reading the newspaper? Find the 90% confidence interval of the mean. (a) State the hypothesis and identify the claim with the correct hypothesis. :H0 ▼(Choose one) :H1 ▼(Choose one) This hypothesis test is a ▼(Choose one) test. (b)Find the critical value(s). Round the answer to 2 decimal places, if necessary. Critical values: (c)Compute the test value. Round the answer to at least 2 decimal places, if necessary. z= (d)Make the decision.…J2.Newspaper Reading Times A survey taken several years ago found that the average time a person spent reading the local daily newspaper was 10.8 minutes. The standard deviation of the population was 3 minutes. To see whether the average time had changed since the newspaper's format was revised, the newspaper editor surveyed 40 individuals. The average time that the 40 people spent reading the paper was 12.4 minutes. At α=0.10 , is there a change in the average time an individual spends reading the newspaper? Find the 90% confidence interval of the mean. **NOTE** I already have answer for a,b, and c (d)Make the decision. ▼(Choose one) the null hypothesis. (e)Summarize the results. There ▼(Choose one) enough evidence to support the claim that there is a change in the average time an individual spends reading the newspaper. Find the 90% confidence interval of the mean. Round the answers to nearest whole number. <u< (f)Do the results agree?…
