Statistics question and answers for October 19, 2023
- Q Part 0 5 Part 1 of 5 3 4 Ho 5 a State the appropriate null and alternate hypotheses tast 6 7 Confidence in banks A poll conducted asked a...
- Q Smartphones A poll agency reports that 24 of teenagers aged 12 17 own smartphones A random sample of 75 teenagers is drawn Round your answers to at least four decimal...
- Q Part 0 5 Part 1 of 5 a State the appropriate null and alternate hypotheses Big babies The National Health Statistics Reports described a study in which a sample of...
- Q Part 0 2 5 Part 1 of 2 6 8 9 10 11 Surgical complications A medical researcher wants to construct a 99 8 confidence interval for the proportion of...
- Q Part 0 2 9 Part 1 of 2 10 11 Hip surgery In a sample of 129 hip surgeries of a certain type the average surgery time was 138 1...
- Q Part 0 5 7 Part 1 of 5 8 9 X 10 11 SAT scores Assume that in a given year the mean mathematics SAT score was 467 and the...
- Q A research study was conducted about gender differences in sexting the sending of sexually explicit messages or images by cell phone A researcher believes that the proportion of girls sexting...
- Q Part 0 3 5 Part 1 of 3 6 7 8 9 10 11 12 Babies According to a recent report a sample of 300 one year old baby boys...
- Q Part 0 6 Part 1 of 6 a Find the mean P 5 The mean ile 6 7 8 9 10 Smartphones A poll agency reports that 24 of teenagers...
- Q A magazine provided results from a poll of 1500 adults who were asked to identify their favorite pie Among the 1500 responders 13 chose Chocolate pie the mangin Of error...
- Q Correct Answer The 40th Part 3 5 Part 4 of 5 percentile of the sample mean is 2 20 d Would it be unusual for the sample mean to be...
- Q Let Y represent the profit or loss for a certain company X years after 1980 Based on the data shown below a statistician calculates a linear model Y 2 16X...
- Q Correct Answer The probability that the sample mean number of TV sets is between 2 5 and 3 is 0 0390 Part 2 5 Part 3 of 5 c Find...
- Q c Find the probability that the proportion of individuals in the sample of 83 who have high blood pressure is between 0 20 and 0 32 Round the answer to...
- Q Send data to Excel Part 1 of 2 a Construct a 95 confidence interval for the mean weight Round the answers to at least three decimal places A 95 confidence...
- Q A musicologist wishes to determine if playing classical music makes cows produce more milk Suppose previous research has established that the average daily milk production for cows is 22 liters...
- Q A 99 8 confidence interval for the mean number of personal computers is 2 703 Part 2 of 4 b If the sample size were 165 rather than 195 would...
- Q Part 2 of 3 b Construct a 98 confidence interval for the proportion of all customers who experienced an interruption Round the answers to at least three decimal places A...
- Q Internet tax The Gallup Poll asked 1033 U S adults whether they believed that people should pay sales tax on items purchased over the internet Of these 434 said they...
- Q Correct Answer Yes the sample size is small but we can see that the sample seems to come from a population with an approximately normal distribution Part 1 6 b...
- Q IQ Scores on a certain IQ test are known to have a mean of 100 A random sample of 41 students attend a series of coaching classes before taking the...
- Q samples technology companies and finds that 37 of them have Twitter accounts Can she conclude that more than 75 of technology companies have Twitter accounts Use the a 0 05...
- Q How many computers In a simple random sample of 195 households the sample mean number of personal computers was 2 82 Assume the population standard deviation is a 0 53...
- Q b A new sample of 83 adults is drawn Find the probability that more than 41 of the people in this sample have high blood pressure Round the answer to...
- Q Yes the sample size is small but we can see that the sample seems to come from a population with an approximately normal distribution Part 1 6 b Perform a...
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