3. A TV advertisement was shown for a total of 25 times. After which, it has been foundout that the sales of the advertised product had a mean of PHP 110 000 a week with astandard deviation of PHP 65 000a. What is the probability that the sample mean belongs to the interval of PHP 100 00to PHP 120 000?b. What is the interval if the mean sales covers the middle 97.5% of the distribution ofthe sample mean?

Answered: Image /qna-images/answer/7681ae5e-d443-4128-a1e8-b6d946fc5e21.jpg

Answered: 3. A TV advertisement was shown for a…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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An advertising agency that serves a job radio station wants to estimate the mean amount of time that the station's audience spends listening to the radio daily. From past studies, the standard deviation is estimated as 45 minutes. What sample size is needed if the agency wants to be 90% confident of being correct to within +/-5 minutes?
A negatively-skewed distribution has = 60, = 10. If this entire distribution is transformed into z-scores, describe the shape, mean, and standard deviation for the resulting distribution of z-scores.
A division-wide aptitude test was conducted on 10 000 pupils. the mean of the test is 58 and standard deviation of 17. The scores also approximate the normal distribution. about how many pupils have score between 58 and 94?
In the past, the value of houses a local realtor has sold is normally distributed with a mean of $259,000 with a standard deviation of $54,000. How much does a house have to sell for so that the house is in the top 10% of highest selling houses for the realtor? (please express your answer in $'s)
Suppose the scores on a difficult exam have a sample mean of 67 and a standard deviation of 20. Suppose the instructor decides to boost each student’s score by 10 points; that is, the instructor adds 10 points to each student’s score. What are the values of the new sample mean and sample standard deviation?
Suppose the midterm exam score for 100 students at UPC had a mean of 70 and a standard deviation of 5. How many students scored between 55 and 85 marks 65 and 75 marks
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.)
What is the equation for The standard deviation of the distribution of sample means
If a distribution has a mean of 46 and a standard deviation of 1, what value would be -2 standard deviations from the mean?
The average score of all golfers for a particular course has a mean of 66 and a standard deviation of 3.5. suppose 49 golfers played the course today find the probability that the average score of the 49 golfers exceeded 67.
The honors program at Brad's university only accepts students with an entrance exam score over 400. What percentage of students would be eligible if the students at Brad's school have an average exam score of 250, with a standard deviation of 80?
Imagine that for those who meditate daily, the number of minutes in meditation has mean 35 and standard deviation 10. In a group of 200 such persons, how many are expected to meditate more than 43 minutes per day?

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