Basic Math question and answers for September 10, 2024
- Q One way people have tried to stop smoking is switch to electronic cigarettes. A group of 50 smokers were randomly chosen. 25 continued to smoke cigarettes and 25 were given...
- Q Use the central limit theorem to find the mean and standard error of the mean of the indicated sampling distribution. Then sketch a graph of the sampling distribution.The per capita...
- Q A study of 55 patients with back pain reported that the mean duration of pain was 17.6months. It is known that the standard deviation of duration of back pain is...
- Q 8) Circle the correct answer. Two variables have a correlation coefficient of r = 0.9. Thisindicates...a) A strong positive correlationb) A weak positive correlationc) A strong negative correlationd) A weak...
- Q A standardized exam's scores are normally distributed. In a recent year, the mean test score was 1463 and the standard deviation was 311. The test scores of fourstudents selected at...
- Q Complete parts (a) and (b) below. The number of dogs per household in a small town Dogs 0 1 2 3 4 5 Probability 0.649 0.084 1 0.226 3 0.022...
- Q Final marks in Maria's Data Management course are based on 70% for term work,15% for the exam, and 15% for the final course project. What term mark did Mariareceive if...
- Q The following numbers show the temperature, in degrees Celsius, of coffee in 30recently tested coffee makers: 76 68 72 73 70 69 68 73 81 72 66 85 72 72...
- Q Which of the following probabilities is the greatest for a standard normal distribution?P(-1.55zs-0.5)P(-0.6sz?0.5)P(05sz?15)P(1.5sz?2.5)
- Q Omar recorded the number of hours he worked each week for a year. Below is a random sample that he took from his data.13, 17, 9, 21What is the standard...
- Q Joan has received scores of 64%, 79%, and 75% on the first three tests in a class. What score does she need to get on the fourth test to have...
- Q Find each item listed below for the data provided.Test Scores: 50, 69, 70, 75, 75, 90, 85, 80, 70, 60, 100, 95, 90, 80, 85, 50(all answers should be rounded...
- Q Assume the random variable X is normally distributed, with mean ? = 58 and standard deviation o=7. Find the 11th percentile.The 11th percentile is(Round to two decimal places as needed.)
- Q The numbers of regular season wins for 10 football teams in a given season are given below. Determine the range, mean, variance, and standard deviation of the population data set.2,...
- Q Kelsey is knitting baby items to sell at a craft fair. She has a total of 1,620 yards of yarn to use for the items. A pair of mittens uses...
- Q A mean average of 60 on 7 exams is needed to pass a course. On her first 6 exams, Sheryl received grades of 48, 74, 76, 61, 70 and 78.What...
- Q Roger sells fire trucks and dolls to a toy store. He sells each fire truck for $15 and each doll for $10. Roger wants to sell at least 25 toys...
- Q The prices of the 21 top-rated 28-inch direct view television sets are as follows. $300 $380 $460 $580 $650 340 390 510 580 650 350 410 540 600 700 Determine...
- Q The highway mileage (mpg) for a sample of 5 different models of a car company can be found below. Find the mean, median, mode and range.21, 23, 26, 28, 28,...
- Q The mean score on a set of 23 tests is 73. What is the sum of all the test scores?The sum of all the test scores is
- Q Find the consumers' surplus and the producers' surplus at the equlibrium level for the given price-demand and price-supply equations. Include a graph that identifies the consumers' surplus and the producers'...
- Q If two states are selected at random from a group of 30 states, determine the number of possible outcomes if the group of states are selected with replacement or without...
- Q David is a statistician. He has a sample size of 40 (which he cannot change). What element of his hypothesis test can he adjust to minimize the probability that he...
- Q One graph in the figure represents a normal distribution with mean = 16 and standard deviation a = 1. The other graph represents a normal distribution with mean u=8 and...
- Q While the majority of people who are color blind are male, an institute reports that 0.3% of women with Northern European ancestry have the common form of red-greencolor blindness. Suppose...
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