5. If a population has a standard deviation of 16, what is the minimum number of samples that need to be averaged in order to be 95% confident that the average of the means is within 3 of the true mean? A) 216 B) 11 C) 110 D) 22 Za/ n=

Q: In some population the interquartile range of the values of income (x) represents 41,9% of its…

A: Formula Used: Median = L+n2-CFf×h Quartile deviation Q = Q3-Q12 First quartile Q1 = L + n4-CFf×h…

Q: d) 3rd Quartile – 1st Quartile e) Standard deviation f) Coefficient of variation

A: 5. It is known- M + N = 110 2N - M = 37 On adding the above 2 equations- 3N = 147 => N = 49 So, M…

Q: Suppose that the number of movies viewed in the last year by high school students has an average of…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: The mean weight of 1000 students at a certain high school is 140 pounds and the variance is 100…

A:

Q: A data set lists weights​ (lb) of plastic discarded by households. The highest weight is 5.13 ​lb,…

A: Given data: The highest weight = 5.13 ​lb, mean of all of the weights :  X =2.181 ​lb standard…

Q: A) For the data in Table 1 below, how many standard deviations from the mean is a run length of 20…

A: The given data table is Female hamsters Run lengths Male hamsters Run lengths 1 2 1 3 2 6 2 4…

Q: Battery lifetime is normally distributed for large samples. The mean lifetime is 500 days and the…

A: Given,   Mean = 500 Standard deviation = 62   The objective is to find the percent of batteries have…

Q: 30. The mean and the standard deviation for a data set are 20 and 5 respectively. Then the…

A: Mean()=20standard deviation()=5x=17

Q: 13.) In the following dataset: 2, 3, 3, 1, 4. What are the Mean and Standard Deviation (estimate of…

A: q-13 x x2 2 4 3 9 3 9 1 1 4 16 ∑x  = 13 ∑x2 = 39   sample size (n) = 5

Q: Suppose that the mean and standard deviation of the scores on a statistics exam are 75.3 and 5.34,…

A: Suppose the random variable x defines the scores of a statistics exam.The random variable x follows…

Q: Chebyshev's Theorem states that the percentage of measurements in a data set that fall within three…

A: The Chebyshev's theorem provides bounds on the probability for distributions for which mean and…

Q: A population of scores has u=55 and o=15.  if 5 points are subtracted from every score in the…

A: The given data is μ = 55σ = 15 Suppose x1, x2, x3, x4, ..., xn are the data points…

Q: ith a mean of 110 and standard dev. of 15, find the 3 unique deviations to the left and right of the…

A: Deviations to the left   i) One standard deviation away from mean x = u - s x = 110 - 15 = 95   ii)…

Q: Suppose that the mean and standard deviation of the scores on a statistics exam are 81.7 and 6.75,…

A: The question is about normal distribution Given : Popl. mean score on stats exam ( μ ) = 81.7 Popl.…

Q: Example 10.9 Assume that the standard deviation o is 300 and n is 25. Calculate the standard error…

A:

Q: IQ scores have a mean of 100 and a standard deviation of 15.  Kelly Stewart has an IQ 0f 130.…

A: Given data: Kelly Stewart has an IQ score, X = 130. Mean of IQ scores = 100 Standard deviation of IQ…

Q: 4) Which of these samples would have the smallest standard deviation? a. 101, 92, 84, 131 b. -25,…

A:

Q: 3) For population standard deviation = 3 and a population mean = 10, find the z scores for the…

A: Obtain the standard z-score for the random variable x = 11. The standard z-score for the random…

Q: 3) The lengths of a certain type of North Atlantic croaker fish are normally distributed. A sample…

A: The length of a certain type of North Atlantic croaker fish are normally distributed. Sample size,…

Q: How many of the sample of families would fall above 2 standard deviations from the mean? A. 0 B. 1…

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Q: 1) The speed of 100 cars was measured on a road with a speed limit of 90 km/h. The data was found to…

A: We have to find probabiities..

Q: 30. The distribution of weights for 12-month-old baby girls in the US is ap- proximately normal with…

A: we have to find percentile value......

Q: Assume that the heights of women are normally distributed with a mean of 63 inches and a standard…

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Q: 3. In a normal frequency distribution of serum sodium concentrations, the mean is 141 mEq/L and the…

A: given data, normal distribution μ=141σ=3.2p(137.8<X<144.2)=?

Q: P3. Show that the mle of unknown standard deviation when the mean is known is different from the…

A:

Q: 5. Diastolic blood pressures are assumed to follow a normal distribution with a mean of 85 and a…

A: The correct option is B) 0.338.