In a reading test, 90 pupils out of 140 passed the test. The sample mean was 78. Find p and q where p was the proportion of these who passed the test. Estimate the population proportions.

Q: If you want a poll to have a margin of error of 2.84%, how large will your sample have to be?

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A:

Q: A sample was done, collecting the data below. Calc 10 22 28 14

A: Given information: The sample data is provided as: x 10 22 28 14 7 It is to…

Q: 95 percent divided .025 what is the z score?

A: The z-score is obtained as given below: PZ≤z=0.025z=ϕ-10.025=-1.96  Using Standard normal table

Q: The mean weight of 32 math students is 42.6 kg. If the students could all stand on the scale…

A: Given that ; The mean weight of 32 math students is 42.6 kg. If the students could all stand on the…

Q: Use the values on the number line to find the sampling error. x= 4.6 H= 4.91 44 4.6 4.8 The sampling…

A: The sample mean is 4.6, and population mean is 4.91.

Q: Report the proportion of the 370 students based on mobile phone brands as a percentage. Apple  269…

A: The percentage of a category can be calculated by dividing the frequency of the category by the…

Q: Greg wants to estimate the percentage of people who lease a car. He surveys 340 individuals and…

A: Sample proportion:Here, the proportion p-cap denotes the people who lease a car. That is, the sample…

Q: Find sample size CI=75% E=3.61 Stand. dev.=6.78

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Q: A group of preschoolers has 15 boys and 12 girls. What is the ratio of girls to boys as a…

A: The group has, 15 boys and 12 girls. So, the ratio of girls to boys is, 12 : 15 = 4 : 5

Q: what are the percentages of each individual fruit?

A: What are percentage of each individual

Q: The median salary of the 1,264 teachers in a large public school district is $39,350. If the 66th…

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Q: What are the steps for Finding Proportions for One Score?

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Q: Will, an art student, randomly sampled oil paintings in a museum. He wanted to find out how many oil…

A: Given :  Margin of Error  (E) = 0.02 The proportion of paintings that were created using the color…

Q: A pollster wishes to estimate the proportion of United States voters who favor capital punishment.…

A:

Q: Use the values on the number line to find the sampling error X=33 =4.03 to The sampling error is

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Q: From the sample statistics, find the value of p1 - p2, the point estimate of the difference of the…

A: From the provided information,

Q: Angela took a general aptitude test and scored in the 85th percentile for aptitude in accounting.…

A: A percentile can be defined as the value below which a certain percentage of values fall for a set…

Q: What percent of the schools have an acceptance rate below 15%? O a) 1% O b) 4% 12% O d) 16%

A: The number of values corresponding to a class or observation is defined as the frequency of that…

Q: The formula for sample proportion is                                  p̂=??p̂=Xn Solve for n.

A: We know that,  The proportion of the sample is  p̂= X/n Then,  We will solve for n = ?

Q: What percent of students earned an "A" grade of 90% or higher? TEST SCORES:…

A: Solution: The given data is 50, 60, 61, 63, 66, 67, 73, 82, 89 and 92. Total number of scores is 10.

Q: Plot the data below using the stem and leaf method. a) 320,332,339,343,345,348,351,352,364,376

A: We need to plot the given data using stem and leaf method The solution to the given question is…

Q: If the proportion of Heads is .45 out of 200 flips, what is the p-value?

A: The proportion of Heads is .45 out of 200 flips.

Q: Explain the sample mean of the difference scores varies.

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Q: The symbol for the sample proportion is O Zc

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: What does the test of a single proportion entail?

A: The One-Sample Proportion Test is used to assess whether a population proportion (P1) is…

Q: The numerical summary that is used for categorical data is a proportion. Group of answer choices…

A: It is an important part of statistics.  It has got wide applications in all forms of statistical…

Q: in the highest 2.5 percent eat?  What is the z-score

A: Given that 2.5% of the highest area present in the data. That is, P(Z>z)=2.5%=0.025…

Q: what percentage of the men worked?

A: men women total work 15 23 80 not work 23 28 51 total 38 93 131 what percentage of the…

Q: A sample of 2100 people were asked if they felt "good" about answer yes' is: 0.53 < p< 0.65 Many…

A:

Q: A random sample of 144 residents in a community produced 88 residents testing positive for the…

A: Null Hypothesis: H0:p=0.5 Alternative Hypothesis: H1:p≠0.5 Given information:…

Q: A recent poll of 700 people who work indoors found that 280 smoke. If the researchers want to be 98%…

A:

Q: In the formula x±zol , the subscript l 2 refers to the area in the lower tail or upper tail of the…

A: We know that the 100(1-α)% confidence interval for the population mean μ is defined as below: x̅ ±…

Q: how do you find the sample proportion?

A:

Q: Below n is the sample size, p is the population proportion and ^p is the sample proportion.  n= 148…

A: Given, Below n is the sample size, p is the population proportion and P^ is the sample proportion.…

Q: if the 90% Ci for the population mean is ( -2.58, 7.54) what is the sample mean

A:

Q: The percentage of men who meet the height requirement is %.

A: Men's height are normally distributed with : Mean , µ = 68.7 Standard deviation , σ = 3.4

Q: Use the values on the number line to find the sampling error. x= 4.5 H= 5.37 4.6 5.4 56 5.8 The…

A: Given: X¯=4.5μ=5.37

Q: What percent of Males are Right Handed? (Round to the nearest Whole Percent) Gender compared to…

A: In this question we need to find a % of males are right handed . While calculating percentage of…

Q: Find the sample proportion, p-hat. When 410 college students were surveyed,150 said they own their…

A: Given, The objective is to find the point estimate for p (p-hat), the population proportion of…

Q: The scores on a statewide math exam were normally distributed with ?=74 and ?=8. What proportion of…

A: GivenMean(μ)=74standard deviation(σ)=8

Q: A sample of Reese's pieces contains the following: 30 Orange, 40 Brown, 20 Yellow. What is the…

A: A sample of Reese's pieces contains the following: 30 Orange, 40 Brown, 20 Yellow Total no. of…

Q: If the proportion of Hs is .25 out of 200 flips, what is the p-value? Round

A: Here proportion of head in fair coin should be 0.5 So take hypothesis with proportion p is 0.5 or…

Q: Find the sample proportion 1. n=550,x=308 2. n=480,x=168 3. n=620,x=248 4. n=740,x=250 5.…

A: Given,1. n=550,x=308  2. n=480,x=168  3. n=620,x=248  4. n=740,x=250  5. n=1120,x=616

Q: Practice questions for a textbook are marked with difficulty levels of easy , intermediate , and…

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Q: Complete the table and determine what percent of the people have exactly zero sibling(s)?

A: Here it is given that , 210 people are asked how many siblings they have. So it means that , you're…

Q: Find the sample proportion, p-hat. When 410 college students were surveyed,150 said they own their…

A: Sample Proportion  :  If repeated random samples of a given size n are taken from a population of…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.