z value at 93.85% = 1.8699
ME = 0. 25
ME = z *(s/sqrt(n))
0.25 = 1.8699 *(2.02/sqrt(n))
n = (1.8699/2.02/0.25)^2
n = 228
the sarple mean to be uithia 0.25 of the poptioa nces with probabi lite - 935500?
The quality control manager at a lgt bub tactory needs to estimate the mean lite of a large shipment of ight bulbs. The standard devation is 81 hours. A random mean life of 320 hours. Complete parts (a) through (d) below a. construct a 95% confidence interval estimate for the population mean ure of light bulbs in this srpment The 95% confidence interval estimate is from a lower limit or (Round to one decimal place as needed ) b. Do...
X 0 لالالا P(x) 0.05 0.25 0.25 0.45 Find the mean of this probability distribution. Round your answer to one decimal place.
16) The number of calories in a 12-ounce serving of randomly-selected regular and lite beers is listed. Is there sufficient evidence to conclude that the mean number of calories for lite beers is significantly less than that for the regular beers? Use α= 0.10. Assume the variables are approximately normally distributed. Regular: 117 118 153 107 102 152 129 126 145 138 153 124 131 28 97 103 61 109 143 116 117 96 97 Lite: a.State the hypotheses. b....
16) The number of calories in a 12-ounce serving of randomly-selected regular and 16) lite beers is listed. Is there sufficient evidence to conclude that the mean number of calories for lite beers is significantly less than that for the regular beers? Use a 0.10. Assume the variables are approximately normally distributed Regular: 117 118 153 107 102 152 129 126 45 138 153 124 131 28 97 103 6 109 143 116 117 96 97 a State the hypotheses...
Please answer this question
Suppose X is normally distributed with mean 1 and standard
deviation 0.25, and Y...
Suppose X is normally distributed with mean 1 and standard deviation 0.25, and Y is also normal with mean 1.5 and standard deviation 0.4. Suppose that X and Y have correlation coefficient 0.6. Find the following probabilities: (a) P(X 2 1.3) (b) P(X+y-2.5) (c) P(X +Y 2 3) (d) P(Y - X so) (e) P(Y <X)
Define price elasticity What do price elasticities of -0.25 and -2.8 mean? Are these numbers different from +0.25 and +2.8, respectively? Describe what it is about these two goods that contribute to their respective price elasticities.
If the mean asset turnover for retail firms is 2.22 with a standard deviation of 0.25, without assuming a normal distribution, within what range will at least 88.89% of retail firms’ asset turnover fall? (Round your answers to 2 decimal places.) The range is?
Songs on iTunes have a mean length of 3.54 minutes with a standard deviation of 0.25 minute? If the distribution of song lengths follows a normal distribution, what percentage of songs are shorter than 4 minutes between 4.4 and 4.6 minutes?
please find the mean, median and mode
Light bulbe Find the mean and median for the train the following table Lite Randoned 8995-9995 05-10205 Interval Pretty 10995 - 1995 TO 1.1995 - 1995 10 Themes 1
The National Center for Educational Statistics (NCES) reports that the average score for 12th graders who took the national reading test was 295 (on a scale of 1 to 500) (source: nces.ed.gov). A random sample of 100 12th graders in Blanchet County, Alabama, schools recently took the test. Students in the sample had an average score of 301. Given the following hypotheses, H0: ? ? 295 (The mean score for the population of Blanchet 12th graders is the same as...