Bob Nale is the owner of Nale's Texaco GasTown. Bob would like to estimate the mean number of litres (L) of gasoline sold to hiscustomers. Assume the number of litres sold follows the normal distribution with a standard deviation of 8 L From his records, heselects a random sample of 13 sales and finds the mean number of litres sold is 41.a. What is the point estimate of the population mean? (Round the final answer to the nearest whole number.)The point estimate of the population mean islitres.b. Develop a 95% confidence interval for the population mean, (Round the final answers to 3 decimal places.)The 95% confidence interval for the population mean is between36.651 and 45349).c. Interpret the meaning of part (b).If 100 such intervals were determined, the population meanwould be Included in aboutJintervals.

Here is given that, mean is 41 and standard deviation is 8. Sample number is 13 We know that,sample…

Answered: Bob Nale is the owner of Nale's Texaco…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 118 and standard deviation of 24 .Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher.a. Around what percentage of adults in the USA have stage 2 high blood pressure? Give your answer rounded to two decimal places. ________%b. If you sampled 2000 people, how many would you expect to have BP> 160? Give your answer to the nearest person.________ peoplec. Stage 1 high BP is specified as systolic BP between 140 and 160. What percentage of adults in the US qualify for stage 1?________ %d. Your doctor tells you you are in the 30th percentile for blood pressure among US adults. What is your systolic BP? Round to 2 decimal places._______ lbs
The scores of students on a standardized test are normally distributed with a mean of 300 and a standard deviation of 40. What percentage of the scores are above 260? A. 40% B. 84% C. 68% D. 32% Can I please have a step by step explanation. Thank you
Please answer a and b
For the sample scores in the frequency distribution table below, the median is 1 4 4. 1 1 1 3.
A sales manager recorded the number of sales made by each of the 300 salespeople working athis chain of furniture outlet stores on a Saturday and created the following table.# Sales (bins) Proportion of salespeople in this bin0 – 3 0.053 – 6 0.156 – 9 0.30 9 – 12 0.3512 -15 0.15a. What is the unit of observation in this sample?b. What is the variable collected?c. Draw and label the histogram for this dataset.d. Which is the modal category?e. Calculate the proportion of the salespeople made 9 or more sales.f. Calculate the number of salespeople who made between 0 and 9 sales.
It is often quoted that in a normal distribution, 95% of the data lies 1.96 deviations either side of the mean. How many deviations from the mean would 88 percent lie?
Assume that the heights of women are normally distributed with a mean of 63 inches and a standard deviation of 1.4 inches. Find Qa, the third quartile that separates the bottom 75% from the top 25%. Click to view page 1 of the table. Click to view page 2 of the table. O A. 62.1 B. 63.9 O C. 64.6 O D. 64.8
Consider the data from the Anthropology 105 class. The mean for women is 64.33 in and the standard deviation is 2.64 in. The average height of men in the US is approximately 5ft 10in. What proportion of women represented here are shorter than the average man?
The empirical rule states that, for data having a bell-shaped distribution, the percentage of data values being within one standard deviation of the mean is approximately a. 33%. b. 95%. c. 68%. d. 50%.
According to a recent publication, the mean price of new mobile homes is $63,500. Assume a standard deviation of $7200. Let x denote the mean price of a sample of new mobile homes. a. For samples of size 50, find the mean and standard deviation of X. Interpret your results in words. b. Repeat part (a) with n = 100. a. For and $ respectively. (Round to the nearest cent as needed.) b. For $and $[ respectively. (Round to the nearest cent as needed.) the mean and standard deviation of the mean and standard deviation of Time Remaining: 01:45:48 are are Next
Use the following information for the question. The average travel time to work for a person living and working in Kokomo, Indiana is 17 minutes. Suppose the standard deviation of travel time to work is 4.5 minutes and the distribution of travel time is approximately normally distributed.Which of these statements is asking for a measurement (i. e. is an inverse normal question)? A.What percentage of people living and working in Kokomo have a travel time to work that is between thirteen and fifteen minutes? B.If 15% of people living and working in Kokomo have travel time to work that is below a certain number of minutes, how many minutes would that be?

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