In a survey of 300 random households in a particular village, mothers have been asked if they use cellphones to communicate. There are 76 who have said YES. Use a 95% confidence to estimate the proportion of all mothers who use the cellphone to communicate.

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Q: Letters Frequency Relative Fri Lower Bound Upper Bound Q 5 Z X J 0.000212 2.63984E-05 0.000398 6…

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A: For men,  = 0.95 * 400 = 380 men were ready to marry there spouses again.

Q: From you A simple random sample from a population with a normal distribution of 108 body…

A: here given  sample mean  = 98.80  sample standard deviation =  s= 0.64  n =108  df= n-1 - 107

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Q: The students in an AFDA class have a mean height of 66 inches and a standard deviation of 7 inches.…

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Q: Example 20.25 You are given the following price index numbers with base year 1995. Calculate the new…

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Q: For a standard normal distribution, find: P(Z < c) = 0.4209 Find c rounded to two decimal places.

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Q: Example 9.15 Let us take another example. The following table shows the number of days in a 50-day…

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Q: How to compute for the 1.  ∑x2   2.  ∑ y2 3. ∑xy of this data set for linear regression?

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Q: Stock A has an expected return of 12% and a standard deviation of 40%. Stock B has an expected…

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Q: 20.22 Splice the two indices with base-year 1990 = 100. Year Index 1990 100 1991 110 1992 120 1993…

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Q: A vote is to be taken among the residents of a town and the surrounding county to determine whether…

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Q: Exercise: Given the monthly water consumption of family Y.What is the coefficient of skewness and…

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Q: L3Q6.The measure of the correlation is -0.32. Find the type of correlation. A.Moderate positive…

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Q: An article in the Journal of Sound and Vibration (Vol. 151, 1991, pp. 383-394) described a study…

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Q: 1. What is the point estimate of the population parameter? 2. Find the 95% confidence interval for…

A: It is given that Sample size n = 60 Sample mean M = 17.3 Population SD = √(18) = 4.2426 The critical…