(a) How many reams should the manager expect to use each day? (b) What is the standard deviation of the number of reams? (c) If the storeroom has 30 reams at the start of the day, how many should the manager expect to find at the end of the day?

If your score on your next statistics test is converted to a z score, which of these z scores would you prefer: - 2.00, - 1.00, 0, 1.00, 2.00? Why? OA The z score of 1.00 is most preferable because it is 1.00 standard deviation above the mean and would correspond to an above average test score. O B. The z score of 0 is most preferable because it corresponds to a test score equal to the mean. OC. The z score of - 1.00 is most preferable because it is 1.00 standard deviation below the mean and would correspond to an above average test score. OD. The z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores. O E. The z score of -2.00 is most preferable because it is 2.00 standard deviations below the mean and would correspond to the highest of the five different possible test scores. O Time MacBook PrO -> G Search or type URL esc ! @ #3 2$ % 2 4 6. 7 8 R Y P Q tab A S F G K caps…

Pat took three exams. In Mathematics, her grade was 75, the mean was 90, andthe standard deviation was 15. In Physics, her grade corresponded to a Z-Scoreof –1.25. In Latin, her grade was 73 and the average was also 73. (i). In which class is Pat’s relative position strongest? _______________(ii). In which class was Pat’s relative position weakest? ___________

In the past, the mean age of consumers of a product was 38 years. Recently the product has been drastically changed. In order to determine whether there has been a change in the mean age of the product consumers, a sample of 16 consumers is selected. The mean age in the sample is 33 years and the standard deviation in the sample is 10 years. Let u = the mean age of the current product (Problem Set #7) consumers. The value of the test statistic is Oa. -2.00 O b.-1.60 OC .0.8 O d. 4.21

On an intelligence​ test, the mean number of raw items correct is 236 and the standard deviation is 39. What are the raw​ (actual) scores on the test for people with IQs of​ (a) 119​, ​(b) 81​, and​ (c)100​? To do this​ problem, first figure the Z score for the particular IQ​ score; then use that Z score to find the raw score. Note that IQ scores have a mean of 100 and a standard deviation of 15.   ​(a) What is the raw​ (actual) score on the test for people with an IQ of 119​?

help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working

A researcher wants to investigate the effects of environmental factors on IQ scores. For an initial study, she takes a sample of 400 people who grew up as the only child. She finds that 51.5% of them have an IQ score over 100. It is known that 50% of the general population has an IQ score exceeding 100. Answer the following. (If necessary, consult a list of formulas.) (a)Find the mean of p, where p is the proportion of people with IQ scores over 100 in a random sample of 400 people.   (b)Find the standard deviation of p.   (c)Compute an approximation for P≥p0.515, which is the probability that there will be 51.5% or more individuals with IQ scores over 100 in a random sample of 400.  Round your answer to four decimal places.

Assume that we have made 10 repeated measurements of a quantity, and as a result the error assigned to the “best estimate” of the mean is 6. If we then expand our data set to a total of 20 measurements, the error in the mean will reduce to just 3. True or False

Suppose that we doubled everyone's original salary what will happen to the mean and sd

According to a study conducted by a statistical​ organization, the proportion of people who are satisfied with the way things are going in their lives is 0.88. Suppose that a random sample of 100 people is obtained. Complete parts​ (a) through​ (e) below. ​(a) Suppose the random sample of 100 people is​ asked, "Are you satisfied with the way things are going in your​ life?" Is the response to this question qualitative or​ quantitative? Explain.     A. The response is qualitative because the responses can be classified based on the characteristic of being satisfied or not.   B. The response is quantitative because the number of people satisfied can be counted.   C. The response is quantitative because the responses can be classified based on the characteristic of being satisfied or not.   D. The response is qualitative because the number of people satisfied can be counted. ​(b) Explain why the sample​ proportion, p​, is a random variable. What is the source…