Current Attempt in Progress If random samples of size 75 are drawn from a population with mean 50 and standard deviation 22. find the standard error of the distribution of sample means. Round your answer to three decimal places, if necessary. standard error
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- A standardized exam's scores are normally distributed. In a recent year, the mean test score was 20.6 and the standard deviation was 5.6. The test scores of four students selected at random are 13, 23, 7, and 35. Find the z-scores that correspond to each value and determine whether any of the values are unusual. Question content area bottom Part 1 The z-score for 13 is (Round to two decimal places as needed.) Part 2 The z-score for 23 is (Round to two decimal places as needed.) Part 3 The z-score for 7 is (Round to two decimal places as needed.) Part 4 The z-score for 35 is (Round to two decimal places as needed.) Part 5 Which values, if any, are unusual? Select the correct choice below and, if necessary, fill in the answer box within your choice. A. The unusual value(s) is/are (Use a comma to separate answers as needed.) B. None of the values are unusual.An insurance company is looking over accident statistics. They want to model the population of all drivers for the population parameter of the standard deviation and variance of the age of the driver involved in an automobile accident. They have a sample of 100 accidents from around the country. The age of the driver in each of these accidents is provided below. Use Excel to calculate the sample standard deviation and the sample variance. Round your answers to one decimal place. Do not round until you've calculated your final answer "Age of people in accident"48643346436728189044472440202747683248472248217347302918487364454920205066654187873417203176493089672222455023481746382942254720463119214227226621236675744621461969202048238851284918204522313823284939 Standard deviation: Variance:The standard deviation of the sample-mean's estimate of a population mean. O False O true C. V also known as relative standard deviation (RSD). * true O false
- コ, ● Question 17 A distribution of values is normal with a mean of 139.3 and a standard deviation of 37.8. Find P. which is the score separating the bottom 64% from the top 36%. 64 PeA Enter your answer as a number accurate to 1 decimal place. Answers obtained using exact z or z-scores rounded to 3 decimal places are accepted.You are conducting a study to see if the probability of catching the flu this year is significantly different from 0.3. You use a significance level of a = 0.02. Ho:p = 0.3 H1:p + 0.3 You obtain a sample of size n = 589 in which there are 161 successes. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... O less than (or equal to) a O greater than a This test statistic leads to a decision to... O reject the null O accept the null fail to reject the null As such, the final conclusion is that... O The sample data support the claim that the probability of catching the flu this year is different from 0.3. O There is not sufficient sample evidence to support the claim that the probability of catching the flu this year is different from 0.3.please send handwritten correct answer Q6 up to 3 decimal don't copy
- STATISTICAL ANALYSIS (No long explanation needed. Rate will be given and write the complete solutions.) Choose the correct answer.When working out the standard deviation, do you use the population equation or the sample equation? I.e do you divide by 10 or 9? Thanks3. A census was conducted at a prison. All prisoners were asked how many tattoos they had which will serve as random variable X. The table below shows the probability distribution for random variable X. 2 3 4
- 30 min in the university student's daily time devoted to sports in Turkey. average and 3 min. It is known to show normal distribution with standard deviation. How many of 8 million university students spend 1 hour a day for sports?z Scores LeBron James, one of the most successful basketball players of all time, has a height of 6 feet 8 inches, or 203 cm. Based on statistics from Data Set 1 “Body Data” in Appendix B, his height converts to the z score of 4.07. How many standard deviations is his height above the mean?Can you show me the steps to complete a problem like this?