draw a sample of size 30 from a normally distributed population with a standard deviation of four. What is the distribution of the sample mean?   Question 11 options: a Poisson b Binomial c Normal

Q: Provide an appropriate response. Use the Standard Normal Table to find the probability. The lengths…

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Q: If you know that the variance of a normal distribution is 50, then to the nearest whole number, what…

A:

Q: The patient recovery time from a particular surgical procedure is normally distributed with a mean…

A: μ = 7 daysσ = 1.2 days

Q: Question 5: This data is from a sample. Calculate the mean and standard deviation. X 12.9 11.9 13.1…

A: Given data is x=12.9,11.9,13.1,19,17,38.4,18.2,36.3sample size(n)=8

Q: ppose that the efficacy of a certain drug is 0.55. Consider the sampling distribution (sample size…

A: given data,efficacy of a certain drug is =p=0.55sample size =n=120we have to find out the mean and…

Q: An experiment involves selecting a random sample of 269 middle managers at random for study. One…

A: The sample standard deviation is 2314.

Q: QUESTION 1 The life of an animal is normally distributed with a mean of 9 years and a standard…

A: Given ,sample size(n)=36mean(μ)=9standard deviation(σ)=1.5

Q: What proportion of a normal distribution is located between the mean and z= -1.40? Question 16…

A: Standard normal distributionZ~N(0,1)mean = 0, standard deviation = 1Proportion of area between mean…

Q: According to a survey in a country, 26% of adults do not own a credit card. Suppose a simple random…

A: The question is about sampling distribution Given : The prop. of adults do not own a credit card ( p…

Q: For a sample with M= 80, a score of X = 88 corresponds to z = 2.00. What is the sample standard…

A:

Q: Which of the following is the best measure of dispersion for a skewed distribution? O Variance O…

A: Solution-: Which of the following is the best measure of dispersion for a skewed distribution? (a)…

Q: e the Cumulative Z-Score Table to answer the questions below. Write your arest whole number. nsider…

A: Note: As per the guidelines, we are only allowed to solve the first three subparts. (a) Given:…

Q: QUESTION 6 Assuming a normal distribution, if our sample is 100, the mean for customer satisfaction…

A:

Q: A sample of test scores is obtained. The scores are displayed as follows: 12.9, 11.6, 13.5, 13.9,…

A: Given data is12.9, 11.6, 13.5, 13.9, 12.1, 11.9, 13sample size(n)=7

Q: You repeatedly draw samples of n = 100 from a population with a mean of 75 and a standard deviation…

A: The correct option is a The standard error of the mean will be smaller ,  because you will be…

Q: calculate the 91st percentile of the standard normal distribution. Round to the hundredths. 

A: calculate the 91st percentile of the standard normal distribution? P(Z<z)=91% z=?

Q: The shape of the distribution of the time required to get an oil change at a 20-minute oil-change…

A: The shape of the distribution of the time required to get an oil change at a 20-minute oil-change…

Q: Question 16: What z scores fall into the upper .15 of the distribution?  Question 18: What z scores…

A: To find the z score corresponding to the upper 0.15 of the distribution, we need to subtract 0.15…

Q: The sample size of n=200 population size N=20,000 p=0.4 What is the standard deviation?

A:

Q: (a) Obtain a point estimate for the population proportion of adults in the country who believe that…

A: Given that  Sample size n = 1026 Number of adults indicated that televisions are a luxury they could…

Q: QUESTION 28 Assume that the time spent by students in extra curricular activities per week is…

A: Given,standard deviation(σ)=11.13 hoursSample size(n)=28

Q: A hypothetical distribution for a population of test scores has a mean of 60.4, a median of 62.8,…

A: According to the given information in this question We need to find standard deviation of sampling…

Q: Drivers pay an average of u = $690 per year for automobile insurance. The distribution of insurance…

A: Solution: Let x  be the insurance payments has normal distribution with mean μ=$690 and standard…

Q: The lengths of adult males' hands are normally distributed with mean 195 mm and standard deviation…

A: "Since you have posted a question with multiple subparts, we will solve the first three subparts for…

Q: pooled is the symbol for:

A: here use basic of notation of some statistics

Q: A gym class is taking a fitness test. The gym teacher is recording how many sit-ups the par-…

A: Formula for Z score ,Z score = score - meanstandard deviation Therefore, score = mean + Z score *…

Q: Calculate the sample standard deviation of    13 20 and 27.       49     7     7(1/2)…

A: The data  set is 13,20,27sample size(n)=3

Q: The amount of calories consumed by customers at the Chinese buffet is normally distributed with mean…

A: (a)  Let X denote the amount of calories consumed by customers. The distribution of X is,…

Q: The weights of the fish in a certain lake are normally distributed with a mean of 10.1 lb and a…

A: Given: μ=10.1, σ=2.9, n=32  The corresponding z-values needed to be computed are: The required…

Q: Provide an appropriate response. Use the Standard Normal Table to find the probability. The lengths…

A:

Q: Find the 99th percentile of a normal distribution with mean 5 and variance 1. 1.28 .99 O 1.645 7.33

A: Given that mu =5,s.d =1,p value =0.99

Q: Suppose the variance of a sample is 7.3. Find the standard deviation. Round to two decimals.

A: Given : Variance , s2 = 7.3

Q: a. What is the distribution of X? X - N( b. Find the probability that a randomly selected Private…

A: Private nonprofit four-year colleges charge, on average, $27,599 per year in tuition and fees. The…

Q: Question 4       The time taken by employees at Grace Floral shop to put a bouquet together has a…

A:

Q: The composite scores of individual students on the ACT college entrance examination in 2019 followed…

A: Based on the provided information, sample size, n=100 Sample mean, x¯ =22 Population standard…

Q: A normal distribution has a mean of 21.5 and a standard deviation of 4.2. What is the Z-score for a…

A: GivenMean(μ)=21.5standard deviation(σ)=4.2x value = 23

Q: The engines made by Ford for speedboats have an average power of 215 horsepower (HP) and standard…

A: Given,sample size(n)=4mean(μ)=215standard deviation(σ)=15

Q: Question 3 Janice measures the circumferences of the trunks of trees in the woods near her house for…

A:

Q: You are given the following information obtained from a random sample of 5 observations. Assume the…

A: 20,18,17,22,18

Q: The following random sample from some population is given: 50-35 -3 0 0 0 0 -30 5 Find the point…

A: