The weight of a certain type of brick has an expectation of 1.12 kilograms with a variance of 0.0009 kilograms². How many bricks would need to be selected so that the average weight has a standard deviation of no more than 0.002 kilograms?

Q: Below are the times (in days) it takes for a sample of 6 customers from Jose's computer store to pay…

A:

Q: A Data analytics professor wants to know whether level of college education influences the grade…

A: In generally we know to test the "test of independence" we use Chi-Square test. Here we also do  the…

Q: The mean diastolic blood pressure for a random sample of 90 people was 90 millimeters of mercury. If…

A:

Q: The scoring averages (points per game) of the starting lineup of a basketball team are as follows:…

A: The provided scoring averages of the starting lineup of a basketball team are  x x2 6.2 38.44…

Q: Suppose that the time required to complete a 1040R tax form is normal distributed with a mean of 90…

A: Given Mean=90 Standard deviations=10

Q: A study was conducted to measure the weights of cabbage produced by a farm in Benguet. The weights…

A:

Q: Seven starting youth basketball players have shoe sizes 10, 9.5, 9, 1, 12, 12.5 and 11.5. Solve for…

A: Let all possible random samples of the same size are considered that have been drawn from the same…

Q: 2. A Municipal Health Officer (MHO) who actively supports the CDD Programme of the government…

A: The confidence interval is the range or interval that has population parameter. It has combined…

Q: An article in The Engineer ("Redesign for Suspect Wiring," June 1990) reported the results of an…

A:

Q: P(Z is less than 1.15)= ✔ [Select] 0.75923 0.8675 0.87493 0.1157

A: Standardized z-score:   The standardized z-score represents the number of standard deviations the…

Q: The scores on a standardized test are normally distributed with a mean of 80 and standard deviation…

A:

Q: In a sample of 250 people, 154 said that they watched educational television. Based on these sample…

A: The best point estimate of population proportion is sample proportion (p^) p^ = xn Margin of error…

Q: Below shows the advertising costs and corresponding sales of JBC Holdings for 10 years Advertising…

A: Given : Advertising Costs(In Million Pesos) Sales(In Million Pesos) 7.4 30 7.5 25 8.5 31.5…

Q: Dr. Castillejo feels that maximum pulse rate during the run is a good predictor in explaining the…

A: Regression line are used to predict the future variable over the other. It shows the relationship…

Q: What is the dependent variable in a correlational study of ice cream sales and air temperature?

A: The temperature is being observe as the dependent variable which is the ice cream is being measured…

Q: Using the steps in hypothesis testing determine if theres a significant relationship between the…

A: The hypotheses are given below: Null hypothesis: H0: ρ= 0 There is no significant relationship…

Q: Compute for the total frequency X frequency 0<x<2 9 2≤z<4 21 4≤ x < 8 f 8≤ x < 10 6

A:

Q: There are 7 seniors on the high school soccer team. Two of them will be chosen to be co-captains.…

A: The formula for Permutation is nPr = n!/(n – r)!. Explanation: Consider that r items need to be…

Q: Please select wrong proposition: 1. x² distribution gets only positive values; 2. x² distribution is…

A: The objective is to identify the incorrect proportion about the Chi-square distribution.

Q: The following table summarizes the smoking status of people living in an apartment complex. A random…

A: The provided information is    Male Female Total Smoker 25 12 37 Non-Smoker 59 45 104 Total…

Q: an engineering firm consists of 30 project engineers and they need to choose 4 project engineers to…

A:

Q: Research Question: On average are their fewer people visiting Universal Studios than Disney World?…

A: Hypotheses for the test are given below:

Q: Given two normal random variables: X-Normal(μ-10,0=7) and Y~Normal(u=20,o=22). When X and Y are…

A:

Q: 7=8 Kate Correlation NO. way selictul and data about their age in years. A sample of 8 children and…

A: Given  n=8, ∑x=44, ∑y=90, ∑xy=509, ∑x2=206, ∑y2=875

Q: An investigator is interested in the wages of married couples. She knows that the hourly wages of…

A: Solution

Q: Find the area of the shaded region under the standard normal curve: 0 1.50 The area of the shaded…

A:

Q: At a certain plant, batteries are produced with a life span that is normally distributed with a…

A: Standard deviation (σ)=2 Population mean (μ)=15 Sample size(n)=27 Sample mean(x)=14.5

Q: Calculate the distance between the two variables given below using the most common method of…

A: Given,

Q: What regression model does this data fit? Determine the trendline based on this model. X y Use the…

A: Given that  By using excel regression

Q: The mean value of land and buildings per acre from a sample of farms is $1600, with a standard…

A: Given Mean=1600 Standard deviations=300

Q: Q5\Data recorded in table below by observing the activity of a single customer line during an…

A: Given:Activity of a single customer line during an eight hour period from 9.00 AM to5.00 PM.Find:1.…

Q: Use the following data to answer the following questions. You can use excel or any app. as…

A: Given that  By using excel  descriptive statistics

Q: Business Weekly conducted a survey of graduates from 30 top MBA programs. On the basis of the…

A: Given: Mean = $152000 Standard  deviation  = $12000 Sample size  = 45

Q: Experiment: Selecting a single card from a standard playing deck. Which has 4 suits (Hearts, Clubs,…

A:

Q: Experiment: Selecting a single card from a standard playing deck. Which has 4 suits (Hearts, Clubs,…

A:

Q: The forecast for 2019 by the logarithmic regression method is 88.4411 81.5334 86.3938 84.9817…

A: Solution: Let X be the Year and Y be the sales. From the given information,

Q: Scenario: A mathematics placement test is given to all entering freshmen at a small college. A…

A: The question is based on a regression model Given :

Q: A) null hypothesis B) alternative hypothesis C) test statistic

A: Given that  Sample size n =400 Favorable cases x =268 Sample proportion p^=x/n  =268/400 =0.67…

Q: E. How large a sample is needed if we want to be 95% co- mean life span of the batteries is not off…

A: Life span of batteries are normally distributed with mean 15 and standard deviation is 2…

Q: QUESTION 5 Below are the ages of 15 students in a college class. What is the median age? OA. 20.6…

A:

Q: For a continuous random variable X, P(25 ≤ X ≤ 73) = 0.28 and P(X > 73) = 0.12. Calculate the…

A:

Q: General Direction: Perform each of the following steps. a. Find the Spearman rank correlation…

A: Given: Sample size n = 6 Significance level α = 0.05 Formula Used:  Correlation coefficient r =…

Q: given the hypotheses H0 :S=S0, HA :S̸=S0, which are tested with a test statistic Y . When H0 is…

A: The hypothesis to be tested is: H0: S=S0 vs. Ha: S≠S0

Q: Corsi and colleagues (2007) conducted a study of the factors mediating whether injection drug users…

A: To validate the claim that if the entry into the specified program is associated with the marital…

Q: 1. In order to improve the health care delivery system in a primary hospital, a systematic procedure…

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: a. Write down the least-squares regression equation and interpret its slope in the context of these…

A: Given, output of analysis of data of price and no. of  kilometers.

Q: A club recruit members either through active recruitment by its current members or through…

A:

Q: Blood glucose levels for obese patients have a mean of 100 with a standard deviation of 15. A…

A: According to policy we supposed to answer three part kindly repost for remaining.

Q: 3. When you performed null hypothesis tests for two samples using a z-test, what can you conclude…

A: 3. When you performed null hypothesis tests for two samples using a z-test, what can you conclude…

Q: political scientist surveys 31 of the current 99 representatives in a state's legislature. What is…

A: Given: A political scientist surveys 31 of the current 99 representatives in a state's legislature.