4) The result of a study says that children receive genes from their parents independently and...
4) The result of a study says that children receive genes from their parents independently and that each child has probability 0.15 of having blood type O. What is the mean and standard deviation of the number of blood type O children among 5?
5) A car dealer says that on average they sell 3 cars per day. Consider that the daily sales follow the Poisson distribution.
a) Find the mean and the standard deviation of the daily sales of the dealer.
b) What is the probability that the dealer makes no sale in a day?
c) If this dealer has only 2 cars available to sell in a day, what is the probability that the dealer is not able to provide the customers demanding a car in the same day?
d) What is the average number of sales during a period of 4 days?
e) What is the probability that the dealer makes more than 1 sales during a period of 4 days?
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4) The result of a study says that children receive genes from
their parents independently and...
i need help with 11.89 a and b (d) What is the standard deviation of the...
i need help with 11.89 a and b
(d) What is the standard deviation of the number of cars sold in a day? Table 11.14 Cars sold in a day 0 3 4 Plx) 0.29 0.3 0.2 0.17 11.89 More Fruit Fly Lifetimes Refer to Table 11.13 in Exercise 11.87 that gives probabilities for fruit fly lifetimes. (a) If we know a fruit fly died before the end of its second month, what is the probability it died in its...
4. A real estate broker who a motel chain assures them that during the summer months on the avera...
Question: What is the null and alternative hypothesis in this
question? Thanks
4. A real estate broker who a motel chain assures them that during the summer months on the average 4,000 cars pass by the property each day. Being suspicious that this figure might be a bit high, the management of the motel chain conducts its own study and obtains a mean of 3,838 cars and standard deviation of 486 cars for 36 days. What can they conclude is...
Question 19 A study was made of seat belt use among children who were involved in...
Question 19 A study was made of seat belt use among children who were involved in car Type numbers in the boxes. crashes that caused them to be hospitalized. It was found that children not Part 5 points wearing any restraints had hospital stays with a mean of 7.37 days and a Part 5 points standard deviation of 2.60 days with an approximately normal distribution. 10 points (a) Find the probability that their hospital stay is from 5 to 6...
Revenue in a cosmetics company comes mostly from their hair products' sales. The marketing department wants...
Revenue in a cosmetics company comes mostly from their hair products' sales. The marketing department wants to estimate the proportion of customers who buy shampoo. How many customers do they need to sample to get a confidence interval for the true mean at 98% confidence level, with an error of +/- 0.02? 1. A heating and cooling company advertises that any customer buying an air conditioner during the first 16 days of July will receive a 25 percent discount if...
The Securities and Exchange Commission has determined that the number of companies listed in NYSE declaring...
The Securities and Exchange Commission has determined that the number of companies listed in NYSE declaring bankruptcy is approximately a Poisson distribution with a mean of 2.6 per month. Find the probability that more than 1 bankruptcy occur next month. Round your answer to four decimal places. The Securities and Exchange Commission has determined that the number of companies listed in NYSE declaring bankruptcy is approximately a Poisson distribution with a mean of 2.6 per month. What is the expected...
A study showed that the average number of hours children in the US watch television each...
A study showed that the average number of hours children in the US watch television each day is 4 hours with a standard deviation of 1.6 hours. If a group of 64 children is selected at random, what is the probability that the average time these children watch television more than 3.5 hours a day?
1. The heights of kindergarten children are approximately normally distributed with a mean height of 39...
1. The heights of kindergarten children are approximately normally distributed with a mean height of 39 inches and a standard deviation of 2 inches. A classroom of 20 of these children is used as a sample. What is the probability that the average height , for the class is greater than 40 inches? Illustrate with a graph. ANSWER: 0.0127 2. The heights of kindergarten children are approximately normally distributed with a mean height of 39 inches and a standard deviation...
Young children in the United States are exposed to an average of 4 hours of background...
Young children in the United States are exposed to an average of 4 hours of background television per day. Having the television on in the background while children are doing other activities may have adverse consequences on a child’s well-being. You have a research hypothesis that children from low-income families are exposed to more than 4 hours of daily background television. In order to test this hypothesis, you have collected a random sample of 64 children from low-income families and...
4) A used car dealer says that the mean price of a 2019 Honda CR-V is...
4) A used car dealer says that the mean price of a 2019 Honda CR-V is more than $24,443. You suspect this claim is incorrect and find that a random sample of 14 similar vehicles has a mean price of $25,050 and a standard deviation of $1084. Is there enough evidence to reject the dealer's claim at a = 0.02? Assume the price of used cars is normally distributed. (18 points total) Step 1: Write the hypothesis statements, identify which...
According to a study, children ranging from ages 8 to 18 averaged 7.9 hours per day...
According to a study, children ranging from ages 8 to 18 averaged 7.9 hours per day using electronic media. Assume the population standard deviation is 2.2 hours per day. A random sample of 45 children from this age group was selected, with a sample average of 8.7 hours of electronic media use per day. Complete parts a and b below a. Is there support for the claim of the study using the criteria that the sample average of 8.7 hours...
i need help with 11.89 a and b
(d) What is the standard deviation of the number of cars sold in a day? Table 11.14 Cars sold in a day 0 3 4 Plx) 0.29 0.3 0.2 0.17 11.89 More Fruit Fly Lifetimes Refer to Table 11.13 in Exercise 11.87 that gives probabilities for fruit fly lifetimes. (a) If we know a fruit fly died before the end of its second month, what is the probability it died in its...
Question: What is the null and alternative hypothesis in this
question? Thanks
4. A real estate broker who a motel chain assures them that during the summer months on the average 4,000 cars pass by the property each day. Being suspicious that this figure might be a bit high, the management of the motel chain conducts its own study and obtains a mean of 3,838 cars and standard deviation of 486 cars for 36 days. What can they conclude is...
Question 19 A study was made of seat belt use among children who were involved in car Type numbers in the boxes. crashes that caused them to be hospitalized. It was found that children not Part 5 points wearing any restraints had hospital stays with a mean of 7.37 days and a Part 5 points standard deviation of 2.60 days with an approximately normal distribution. 10 points (a) Find the probability that their hospital stay is from 5 to 6...
Revenue in a cosmetics company comes mostly from their hair products' sales. The marketing department wants to estimate the proportion of customers who buy shampoo. How many customers do they need to sample to get a confidence interval for the true mean at 98% confidence level, with an error of +/- 0.02? 1. A heating and cooling company advertises that any customer buying an air conditioner during the first 16 days of July will receive a 25 percent discount if...
4) A used car dealer says that the mean price of a 2019 Honda CR-V is more than $24,443. You suspect this claim is incorrect and find that a random sample of 14 similar vehicles has a mean price of $25,050 and a standard deviation of $1084. Is there enough evidence to reject the dealer's claim at a = 0.02? Assume the price of used cars is normally distributed. (18 points total) Step 1: Write the hypothesis statements, identify which...
According to a study, children ranging from ages 8 to 18 averaged 7.9 hours per day using electronic media. Assume the population standard deviation is 2.2 hours per day. A random sample of 45 children from this age group was selected, with a sample average of 8.7 hours of electronic media use per day. Complete parts a and b below a. Is there support for the claim of the study using the criteria that the sample average of 8.7 hours...
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