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24 Aug
2020

# A sociologist is studying the age of the population in Blue Valley. Ten years…

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A sociologist is studying the age of the population in Blue Valley. Ten years ago, the population was such that 20% were under 20 years old, 10% were in the 20- to 35-year-old bracket, 34% were between 36 and 50, 24% were between 51 and 65, and 12% were over 65. A study done this year used a random sample of 210 residents. This sample is given below. At the 0.01 level of significance, has the age distribution of the population of Blue Valley changed?Under 20 20 – 35 36 – 50 51 – 65 Over 65 29 25 65 67 24(i) Give the value of the level of significance.State the null and alternate hypotheses.H0: Time ten years ago and today are independent.H1: Time ten years ago and today are not independent.H0: The distributions for the population 10 years ago and the population today are the same.H1: The distributions for the population 10 years ago and the population today are different. H0: The population 10 years ago and the population today are independent.H1: The population 10 years ago and the population today are not independent.H0: Ages under 20 years old, 20- to 35-year-old, between 36 and 50, between 51 and 65, and over 65 are independent.H1: Ages under 20 years old, 20- to 35-year-old, between 36 and 50, between 51 and 65, and over 65 are not independent.(ii) Find the sample test statistic. (Round your answer to two decimal places.)(iii) Find or estimate the P-value of the sample test statistic. (Round your answer to three decimal places.)(iv) Conclude the test.Since P-value
a. b. c. What is the relation between probability and normal distribution?The quality grade point averages of 300 college freshmen
a. b. c. What is the relation between probability and normal distribution?The quality grade point averages of 300 college freshmen follow approximately a normal distribution with a mean of 2.1 and standard deviation of 0.8. How many of these freshmen would you expect to have a score between 2.5 and 3.5 inclusive if the point averages are computed to the nearest tenth.Take 10 values at random of and then find mean, standard deviation of that set. Also find a point which covers no more than 5% of data with the help of normal distribution.
A- B- C- What is the relation between probability and normal distribution?The quality grade point averages of 300 college freshmen
A- B- C- What is the relation between probability and normal distribution?The quality grade point averages of 300 college freshmen follow approximately a normal distribution with a mean of 2.1 and standard deviation of 0.8. How many of these freshmen would you expect to have a score between 2.5 and 3.5 inclusive if the point averages are computed to the nearest tenth.Take 10 values at random of x and then find mean, standard deviation of that set. Also find a point which covers no more than 5% of data with the help of normal distribution.
a. b. c. On his journey to school, Joe’s school bus must pass through three sets of traffic lights which
a. b. c. On his journey to school, Joe’s school bus must pass through three sets of traffic lights which are equally likely to be red or green. What is the probability that the first two lights will be green and the third one red?A spinner used in a game has 10 sections, of which 5 are colored Red, 3 Green and 2 blue. The spinner is spun 2 times. What is the probability of obtaining a Red and a Blue?Identify which situation follows a normal probability distribution with reasons: i. Weights of BSCS students in a class. ii. Balls of red color in a box. iii. Filling of jam in a jar of 500g from a machine. iv. Recovery of CORONA patient in Pakistan.
Provide some examples of discrete and continuous variables. What attributes of these variables make them discrete and continuous? Why?Discrete variables-
Religion and Theology Assignment Writing ServiceProvide some examples of discrete and continuous variables. What attributes of these variables make them discrete and continuous? Why?Discrete variables- the value of the variable is found in whole numbers by counting. Examples: # of red candies in a jar, # of students in a class, Gender of students in the class etc…Continuous variables- the value of the variable is found by measuring and can contain decimals. Examples : Distance, time, height, weight etc… References:Lind, D. A., Marchal, W. G.,
a. b. c. Explain how the null hypothesis and the alternative hypothesis formulated.Distinguish between the concept a test at a
a. b. c. Explain how the null hypothesis and the alternative hypothesis formulated.Distinguish between the concept a test at a (alpha) level of significance and at (1- a ) confidence level. A random sample of 16 values form a normal distribution gave means 42inches and sum of squared deviations from mean is 135 . Test the hypothesis that mean in population is 43.5 inches.
You are the foreman of the Bar-S cattle ranch in Colorado. A neighboring ranch has calves for sale, and you
Find Solutions For Your Homework businessoperations managementoperations management questions and answersCASE STUDY – DATA COLLECTION METHODS ZOOM CASE CHAPTER 9:
1) You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population
1) You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=42.7. You would like to be 99% confident that your esimate is within 2.5 of the true population mean. How large of a sample size is required?n=Do not round mid-calculation. However, use a critical z value accurate to two (2) decimal places.2) According to a study, 80 % of adult smokers started smoking before 21 years old. 8 smokers 21 years old or older are randomly selected, and the number of smokers who started smoking before 21 is recorded.The probability that at least 4 of them started smoking before 21 years of age is ____The probability that at most 7 of them started smoking before 21 years of age is ____ The probability that exactly 6 of them started smoking before 21 years of age is ____3) In conducting the hypothesis test below, your sample consists of 15 observations, with a mean of 57.5 and standard deviation of 1.08.H0:μ≤57H1:μ
67 percent of the customers of a fast food chain order the Whopper, French fries and a drink. A random
67 percent of the customers of a fast food chain order the Whopper, French fries and a drink. A random sample of 17 cash register receipts is selected. What is the probability that eight receipts will show that the above three food items were ordered? (Round the result to five decimal places if needed.)
The records of a computer retail store show that out of the 25 customers who purchased a desktop computer last
The records of a computer retail store show that out of the 25 customers who purchased a desktop computer last month, all but 7 also purchased a service plan that extends the warranty for an extra year. Out of the 50 customers who purchased a notebook computer last month, all but 11 purchased the same service plan.Fill in the blanks of the statement below to make the statement the most reasonable possible.Last month, customers of the store who purchased ?desktopnotebook computers were less likely to purchase the service plan, because only % purchased the service plan, whereas % of the customers who bought ?desktopnotebook computers purchased the service plan.

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