3. Suppose that you randomly picked 100 iPhones and calculated the average battery life for these phones. Provide your best guess of the value of the average.

Q: If you are told only that you scored in the 80th percentile, do you know from that description…

A: p-th percentile means that there are p% of the values are less than that value. Here, you scored in…

Q: Estimate the measure of ZGHI to the nearest 10°. H

A:

Q: A sample selected from a population gave a sample proportion equal to 0.60.

A:

Q: 3. In a Gallup Pool, 52% of 1038 surveyed adults said that second hand smoke is "very harmful". What…

A: Following information is given:   Total number of people survey = 1038 Percentage of people who said…

Q: A bookstore found out that 23% of their customers buy a book, 34% of their customers buy two books,…

A: Given: Let X represents the number of books that customers buy. The random variable X can take…

Q: A random sample of 324 residents of a community revealed that 30% were very satisfied withthe…

A: Given that, Critical values: By using the standard normal table of Z, the critical value for two…

Q: A grocery store has determined that in crates of tomatoes, 95% carry no rotten tomatoes, 2% carry…

A: Given: The probability that crates carry no rotten tomatoes is 0.95. The probability that crates…

Q: . A population has a mean of μ = 40. a. If 5 points were added to every score, what would be the…

A: Given that population mean is given by 40

Q: se a study revealed 5*

A: Given, a study revealed 57% of all subjects possessed trait A, 28% possessed trait B, and…

Q: a sample of size 32 and mean = 40, then the degree of freedom is Answer:

A: It is given that, sample size, n=32 Mean =40

Q: If 2% of the components produced by a machine are defective, what is the average number of defective…

A:

Q: The mean score of a girl in 3 tests is 68. What should her mean score in 2 remaining tests be in…

A:

Q: Choose the best answer for the statistical conclusion.

A: Given information: The data represents the turnaround time for 4 types of contractors and 3 types of…

Q: requires

A:

Q: Two doctors asked 6 of their patients, who were smokers, how many years they had smoked. In…

A: Correlation coefficient: Correlation coefficient measures the strength and direction of linear…

Q: Suppose in a single month a certain baseball team won 3 games and lost 21 what percentage of the…

A:

Q: 2. Compute the mean for the difference scores.

A: First we have to calculate the difference in scores for each participants.

Q: Is it more likely to hit the area in white or blue and by how much?

A: The area of the square is= 18×18=324  square inch The radius of the circle is= 2+3+3=8 inches So the…

Q: About 7% of males are colorblind. Hoping to find many colorblind men for her study, a researcher…

A: It is given that p =0.07 and n = 433.

Q: 1)If all of the values in a set of data were doubled, what would happen to the mean?

A:

Q: What is the measure of PD?

A: From the figure  FD is diameter , Therefore, ∠FED=90∠FEP+∠PED=9035+∠PED=90∠PED=90-35∠PED=55

Q: For a population with u = 80 and o = 10, what is the X value corresponding to z-score = - 2.00? Edit…

A:

Q: The head of a computer science department is interested in estimating the proportion of students…

A: Given: Margin of error E = 0.04 Significance level α = 0.05 The critical value Zα/2=Z0.05/2=1.96 The…

Q: Two doctors asked 6 of their patients, who were smokers, how many years they had smoked. In…

A: Given, Two doctors asked 6 of their patients, who were smokers, how many years they had smoked. In…

Q: a. What percentage of adult men can fit through the door without bending?

A: Let , X be the height of men. Here , X→N(μ=67.1 , σ=3.6) Since , the door height is 56.2 in. Our aim…

Q: Given the mean of a certain data set as 155, what will be its new mean if all the data points were…

A: Remark: We know that, The mean (average) of a data set is found by adding all numbers in the data…

Q: Imagine that the following four sentences are questions on a survey.  Which question would produce…

A: A. How many years have you participated in track-and-field.

Q: The following table shows the systolic blood pressure of 5 women and 5 men.   Women 110 120 95…

A: We state the hypothesis for testing difference in means.  H0: There is no significant difference…

Q: A sobriety test is 96% accurate. Suppose 2500 drivers were pulled over on suspicion ofintoxication,…

A: Given that the sobriety test is 96% accurate, 2500 drivers were pulled over on suspicion of…

Q: An educator desires to estimate, within 4%, the true percentage of high school students who study at…

A:

Q: Carter conducted an experiment to see how many people who passed by him at the park were wearing…

A: Given,          Carter conducted an experiment to see how many people who passed by him           at…

Q: 1. Use the results of the simulation to approximate the margin of error for Javier's estimate of the…

A: Here we have to calculate margin of error Assuming the confidence Interval = 95% Sample Size  = 500…

Q: To determine the BEST prediction of the number of electric cars that will be sold in 2022 based on…

A: Given, Years since 2010 cars sold 1 17763 4 118882 7 195581 9 326644

Q: In a study with lower quartile 100, upper quartile 140 and median as 130 How many people can have…

A:

Q: The efficiency expert at a computer company tested 40 engineers to estimate the average time it…

A: Given,sample size(n)=40sample mean(x¯)=12.73standard deviation(s)=2.06degrees of…

Q: hat is the mean of X, the number of patients seen until an injection-site reaction occurs? 3.1289…

A: Given:- Percentage of number of patients experiencing injection site reaction with needle =11%.…

Q: A population with a mean of 8 has a sum of 40. How many scores are in the population?

A:

Q: Define If the actual Y score was 31, but the predicted score was 28, then the error of prediction is…

A: The formula for the calculation of the prediction error is given below:

Q: Data collected by the Oil Price Information Service from more than 90,000 gasoline and convenience…

A: The mean is the average value of all the observation. It is calculated using the formula: The…

Q: State the generic error for an interpolating formula?

A:

Q: In a sample of 20 men, the mean height was 178 cm. In a sample of 30 women, the mean height was 164…

A:

Q: e. What is the highest personal messaging frequency among the bottom 20% of employees in terms of…

A: We have to find the values for normal distribution using CLT.

Q: Given the mean of a certain data set as 115, what will be its new mean if all the data points were…

A:

Q: Age(x) 8 15 22 27 34 40 Sleep (y) 8 8 7 7 5 6

A: We have given that, X :- 8, 15, 22, 27, 34, 40 Y:- 8, 8, 7, 7, 5, 6 Then,  We will find the…

Q: Suppose a statistics professor reports a final exam average

A: Empirical rules tell us about how much percentage of data falls within the intervals. According to…

Q: a. How many of the 125 people had resting pulse rates of more than 100? b. What percentage of people…

A: a. There are totally 125 people who had resting pulse rates. Count the number of dots that are above…

Q: Wildlife biologist inspects 153 deer taken by hunters and find 32 of them carrying Lyme disease…

A: According to the provided information, n=153x=32p=xn=32153=0.209

Q: The mean weight of 15 wrestlers is 110 kgs. The mean weight of 5 of them is 100 kgs and another 5 is…

A: Given that, the mean weight of 15 wrestlers is 110 kgs. The mean weight of 5 of them is 100 kgs and…

Q: If im getting 5gb of data per day , then what will be the EPS (event per second) in 24 hrs?…

A: Consider the provided question, Since, In 1 days or 24 hrs got 5 GB data. Given, 400 bytes = 1 eps…

Q: Suppose you want to investigate the proportion of households in Muscat governorate that have fire…

A: Given information: The investigator is specially interested to estimate the proportion of households…

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.