price earning ratios of 100randomly selected shares are: please find a) mean and b) standard deviation...
find mean AND std deviation
Frequency Stock analysis. The price caming ration of 100 randomly selected stocks from the New York Glock Exchange are Interval -0.5-45 45-95 95145 14.5-195 19.5-245 245-295 29.5-345 INNOR a. Find the mean of the price caring ratios (Type an integer or a decimal Round to two decimal places)
find a) mean and b) standard deviation
Frequency The lives (in hours of continuous use) of 100 randomly selected flashlight batteries are 2 Interval 6.96 -7.45 745-7.95 7.95 -8.45 8.45-8.95 8.95 -9.45 9.45-9.95 9.95 - 10.45 19 38 20 10 3 . Find the mean of the battery lives (Type anveger or a decimal. Round to two decimal places.)
please find mean and standard deviation
Nutrition: animals. The mouse weights (in grams) of a random sample of 100 mice involved in a nutrition experiment are: Interval 141.5 - 43.5 43.5 - 45.5 45.5 - 47.5 47.5-49.5 49.5-51.5 Frequency 3 7 11 23 16 Interval 51.5 - 53.553.5-55.5 55.5 -57.5 57.5-59.5 Frequency 17 15 a. Find the mean of the weight of the mice.gms (Type an integer or a decimal. Round to two decimal places.) 12
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4. Find the mean and the standard deviation of the following frequency distribution table: Class Limits 24-29 30-35 36-41 42-47 Class Boundaries 23.5-29.5 29.5-35.5 35.5-41.5 41.5-47.5 Class Midpoint 26.5 32.5 38.5 44.5 Class Frequency 4 9 15 2 Cumulative F. 4 13 28 30 Mean: Standard Deviation: 5. Nurses monthly salaries have a bell shaped distribution with x = $6400 with S = $300. a. Find the 68% and 95% range b. Abby made...
Find the 95% confidence interval for the variance and standard deviation for the price in ten thousand dollars of a Boiler Machine. The data represent a selected sample of 10 warehouses in the US. Assume the variable is normally distributed. 60 55 54 53 52 39 49 46 49 48
College students annual earnings are normally distributed with standard deviation σ-$800. If the mean earning for gro construct a 95% confidence interval estimate of the mean annual earnings for all college students. 10. up of 64 students is $4000,
Find and , the mean and standard deviation of the sampling distribution of : μ = 25, σ = 5, n = 10. A. = 25, = 1.58 B. = 25, = 0.5 C. = 2.5, = 0.5 D. = 7.91, = 1.58
A normal distribution has a mean of 99 and a standard deviation of 10. Find the probability that a value selected at random is in the following interval. at most 109
Find the standard deviation for the set of grouped sample data. Frequency Interval 0.5-3.5 3.5-6.5 6.5-9.5 9.5 - 12.5 6 5 4 5 Sa (Type an integer or a decimal. Round to two decimal places.)
The population mean and standard deviation are given below. Find the required probability and determine whether the given sample mean would be considered unusual. For a sample of n=64, find the probability of a sample mean being less than 24.5 if mμ=25 and σ=1.31