The mean of Binomial distribution is 80 and standard deviation is 8.The value of n is ____
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- Describe the 68-95-99.7 rule for the normal distribution. If the average score on an exam is 85 and the standard deviation is 5, using the 68-95-99.7 rule, describe the distribution of the student’s scores.An Intelligence test score for adults is normally distributed with a mean of 100 and population standard deviation of 15. What is the probability we could select a sample of 64 adults and find that the mean of this sample is between 98 and 103? (answer rounded to 2d.ps)In a random sample of ten cell phones, the mean full retail price was $554.00 and the standard deviation was $167.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean u. Interpret the results. Identify the margin of error. (Round to one decimal place as needed.)
- Determine the values of the following quantities. (Round your answers to three decimal places.) (a) to.10, 10 (b) to.05, 10 (c) to.05, 27 (d) to.05, 60 (e) to.005, 60 USE SALTSuppose that the number of customers who enter a supermarket each hour is normally distributed with a mean of 650 and a standard deviation of 230. The supermarket is open 15 hours per day. What is the probability that the total number of customers who enter the supermarket in one day is greater than 10400? (Hint: Calculate the average hourly number of customers necessary to exceed 10400 in one 15-hour day.) Probability =can you find the mean and standard deviation?
- Plzzz explainSuppose IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability a random sample of 250 people has a mean IQ of more than 102?What is the probability that a student has a score between 80 and 90 if the normally distributed math scores have an average of 85 and a standard deviation of 10?
