Find the  z -score for which  85%  of the distribution's area lies to its right.

Q: The data below gives the mean price (in cents) of a litre of regular gasoline at self-service…

A: Given that  We have to find c..90% confidence interval for mean  d..95% confidence interval for…

Q: Vitamin D, whether ingested as a dietary supplement or produced naturally when sunlight falls upon…

A: Given that, n= 2700 and p = 23% = 0.23

Q: Construct a 90​% confidence interval of the population proportion using the given information.…

A: x=240  n=300  p= 240/300 = 0.8 q = 1-p = 1-0.8 = 0.2

Q: Find the population mean or sample mean as indicated. Sample: 23, 11, 6, 7, 8 Select the correct…

A:

Q: Find the following probabilities: 1. P(Z -1.2)= 2. P(Z ≥ 0.08) = 3. P(0.23 ≤z≤ 1.40) =

A: Given information- We have given the standard normal distribution with a mean of 0 and a standard…

Q: There are 57 runners in the race. How many ways can the runners finish first second and third.

A: given data, there are 57 runners in the race we have to find out the no. of ways can runners finish…

Q: r T∼Tdf=5T∼Tdf=5, use technology to find the probability P(−3.09<T<−2.77)P(-3.09<T<-2.77):…

A: given datadf=5we have to find out the p(-3.09&lt;t&lt;-2.77)=?here we use excel function for find…

Q: Which of the following represents a monotonic relationship?     None of these explanations…

A: Hey there! Thank you for posting the question. Since there are multiple questions posted, we will…

Q: When the F statistic is more than the critical cutoff value, additional follow-up analyses are…

A: When the F statistic is more than the critical cutoff value, additional follow-up analyses are…

Q: A telemarketer's computer selects phone numbers at random. The telemarketer has recorded the number…

A: age frequency under 18  30 18-25 27 26-35 38 36-45 59 over 45 54

Q: Direction: Perform hypothesis testing. Show all the steps and solutions. Note: Excel / Stat…

A: Given  n=10 Null and Alternative Hypothesis  H0:ud=0 H:ud&gt;0 where ud=ubefore=uafter

Q: The expected value E(x) of a binomial probability distribution is

A: Given data The expected value of a binomial probability distribution is

Q: A simple random sample of 36 8th graders at a large suburban middle school indicated that 84% of…

A:

Q: Find the z value that corresponds to the given area in the figure below. enter the answer to 2…

A: From the provided information, The area is to the right which is 0.0082.

Q: A random sample of  19  registered nurses in a large hospital showed that they worked on average…

A: Given  sample mean x̄=44.3, n=19=sample size, s=sample standard deviations=2.6

Q: Maximum photosynthetic rates were measured in leaves from diploid (2N) and tetraploid (4N) tall…

A: Given that We have to develop the the null hypothesis of no difference in the photosynthetic rates…

Q: Express the confidence interval (332.6, 538.6) in the form of a ± ME. ME: Add Work H

A: given data  ci : (332.6,538.6)  represent ci in the form of x¯ ±ME

Q: A professional baseball player receives a shipment of 10 new bats that are identical in appearance,…

A: 3 defective bats 7 non defective bats ____________________ 10 total bats   select 5 at random…

Q: In a random sample of 81 audited estate tax​ returns, it was determined that the mean amount of…

A: Givensample size(n)=81Mean(x)=3407standard deviation(s)=2512confidence level=90%

Q: Use the probability distribution to complete parts (a) through (d) below. The probability…

A: Required probability is P(X=1 or 2)

Q: Assume the average price for a movie is $10.05. Assume the population standard deviation is $0.42…

A: As per our guidelines we are suppose to answer only one question. Given,sample size(n)=34population…

Q: The mean tuition cost at state universities throughout the United States is $4,260 per year. Use…

A: From the provided information, Mean (µ) = 4260 Standard deviation (σ) = 900 X~N (4260, 900) Sample…

Q: Find t0.69t0.69 for TT distribution with 8282 degrees of freedom. t0.69=t0.69= (Round the answer to…

A: We need to find t0.69 for T distribution with 82 degrees of freedom.

Q: What industry statistics can a business use for comparison? How can they use that information in…

A: Industry Statistics Industry statistics provide information on economic activity, particularly in…

Q: A tutor who teaches four tutorials is interested in exploring whether certain colours are better…

A: Here, to see difference color power points slides impact students final exam grades.

Q: The familywise error rate for two uncorrected t-tests, each using an alpha level of α' = .05, would…

A: Given that, Number of tests = 2  Alpha = 0.05

Q: There are 805 identical plastic chips numbered 1 through 805 in a box. What is the probability of…

A: the required Probability is given by ; Probability = (No. of Favorable outcomes)/(Total no. of…

Q: What is df total?

A: What is df total?

Q: Find the first, second, and third quartiles of the ages of 9 middle-management employees of a…

A:

Q: A poll of 2 comma 035 randomly selected adults showed that 90​% of them own cell phones. The…

A:

Q: A very large bag contains more coins than you are willing to count. Instead, you draw a random…

A: From given data we have : Quarters = 26 Dimes = 23 Nickels = 22 Pennies = 29 Total = 100

Q: researcher was interested in the relationship between number of close friends and self-esteem. A…

A: Since there are multiple questions, part a, b, c is answered. kindly repost for more help.

Q: QUESTION 11 You hypothesize that drinking water increases test scores so you design a study…

A: Given that  Sample sizes n1=27 , n2=35

Q: Given the spot speed of 20 vehicles on a certain traffic section. Use 8 classes. Determine: a. The…

A: Please find the explanation below. As asked by you, I have answered the questions (a) and (b).

Q: In a gaming conference attended by 80 people, 35 plays Valorant, 20 plays DOTA. 15 plays Genshin…

A: we have to draw venn diagram and find number of people who plays atleast one ganmes

Q: Refer to the accompanying data display that results from a sample of airport data speeds in Mbps.…

A: Given  CI =(13.046,22.15)

Q: A professor wants to know if her Psychology statistics class has a good grasp of B math. Six…

A: Solution: Given information: n= 6 Sample size μ=70 Population mean x=∑xn=4756=79.1667 Sample mean…

Q: A researcher was interested in finding out whether students’ sense of belonging in a course differed…

A: The objective is to test whether students’ sense of belonging in a course differed between students…

Q: In order to set rates, an insurance company is trying to estimate the number of sick days that full…

A: Solution-: Given: σ=3.3,M.E.=E=1,c=0.99 We want to find sample size n=?

Q: Periodically, the county Water Department tests the drinking water of homeowners for contaminants…

A: Given that: Lead (μμg/L) Copper (mg/L) 4.4 0.643 2.4 0.57 1.5 0.46 2.6 0.895 5.9 0.2…

Q: QUESTION 16 You are interested in investigating the efficacy of a stressor and design an experiment…

A: Given that  Sample size n =12 Level of significance =0.05

Q: According to a recent report​ (based on historical​ data), 47% of college student internships are…

A: Given claim: whether the proportion of college interns that had unpaid internships is different…

Q: Find the necessary sample size. You wish to estimate the mean weight of machine components of a…

A: given data 92% ci E = 0.004σ = 0.04n = ?

Q: Find the Critical Values of the Standard Normal Distribution needed for a 98% confidence interval…

A:

Q: virus is that these cells die. In this study of the effectiveness of a new anti-viral drug on HIV,…

A: In this case, the baseline (x) is the independent variable, and the one year follow-up values (y) is…

Q: The median for the given set of six ordered data values is 28.5. 5 12 21 41 49 What is the missing…

A:

Q: A professor wants to know if her Psychology statistics class has a good grasp of Basic math. Six…

A:

Q: A box contains many tickets, with an average value of 20 and an SD of 5. If we draw 250 times with…

A: Solution-: Given: μ=20,σ=5,n=250 We want to find P(the approximate chance that the sum of draws is…

Q: If you use a  0.05 level of significance in a​ two-tail hypothesis​ test, what decision will you…

A: The given ZSTAT is -2.03 and level of significance is 0.05.

Q: The accompanying data represent the carbon dioxide (CO₂) emissions (in thousands of metric tons) of…

A: Mean is the sum of observations divided by the total number of observations.