A light bulb manufacturer claims that the mean life of a certain type of bulb is 7500hrs. You think this information is not correct, after randomly selecting 30 bulbs, you find the average number of hours to be 7000. Level of significance is 0.10. Is there enough evidence to support your claim? Standard deviation is 5000.

Q: Assume that a randomly selected subject is given a bone density test. Bone density test scores are…

A: We have given information, Let Z denote the bone density test score are normally distributed with a…

Q: Note that you must complete both parts a. and b. to receive any marks for the remaining parts of…

A: Here the given table is we have to find the missing value , expected value and standard deviation…

Q: A biotechnology company produced 187 doses of somatropin, including 11 which were defective. Quality…

A: GivenNo.of doses produced=187No.of defective doses=11P(defective)=11187=117sample size(n)=13

Q: QUESTION 20 The time spent on social media platforms per day by adults has a distribution with a…

A: We have given that Mean(µ) = 125Standard deviations (σ) = 16  Here we have Sample size (n) = 16

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A:

Q: Given the difference equation y(k + 2) − 2 y(k + 1) + = y(k) = = e(k) where y(0) = y(1) = 0, e(0) =…

A:

Q: What is the probability that a buyer paid less than $685? What is the probability that a buyer…

A: Given: Mean μ=1000 Standard deviation σ=105

Q: ouTube myMCC | Middlesex... Dashboard Google Docs NJ Athletic Confere... 2021 Football Stan... a)…

A: n=23, s=3.4, sample mean x̄=14

Q: A survey was conducted to find out the number of people who liked orange juice out of the entire…

A: 1.  469 people liked both orange and apple juice: unbiased (just a piece of information, no…

Q: Cybersecurity is a critical business issue that demands the attention of business and IT executives.…

A: Given The data is as follows: Sample proportion, p^=0.67

Q: you start a backward elimination process with the most complex model possible Denoted by C ∗ S ∗ W,…

A: *Answer:

Q: In a survey, 29 people were asked how much they spent on their child's last birthday gift. The…

A: Answer  Given  Confidence interval CI = 80%   α=1-0.80    =0.2 sample size [n] =29  degree of…

Q: The Venn diagram here shows the number of people in each set. Use this to find the probability of…

A: Introduction A Venn diagram shows a logical relationship b/w sets.

Q: What is the correlation between a person's income and their level of education, and to what extent…

A:

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A drug is…

A: Givensample size(n)=4873x=177confidence level=99%

Q: Consider the following hypothesis test: Ho: p2 0.75 H₁: p<0.75 A sample of 400 items was selected.…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub parts for…

Q: A genetic experiment with peas resulted in one sample of offspring that consisted of 432 green peas…

A: From given  x=151n=432 so, Proporation is : p^=xn=151432=0.3495

Q: he management of Lindiwe Accounting Services are concerned about the increase in overtime hours…

A: Data is given :  Over time hours : (Y) = {478,322,405,308,505,308} My = (478+....308)/6 My = 387.67…

Q: Additional Materials fectly symmetrical distribution, when would the mode be different from the mean…

A: Given that following data are the distances between 20 retail stores and a large distribution…

Q: Find the probability of choosing an "a" from the word "preparation". O 20% O 18.2% O 5.5% Ⓒ2%

A: Total words in "preparation"=11 Total a in given word=2

Q: The length of human pregnancies (with no complications) from conception to birth varies according to…

A: Given that.   X~N( μ , ?)   μ=260 , ?=10   Z-score =( x - μ )/?

Q: Find the critical value to for the confidence level c = 0.99 and sample size n = 9. Click the icon…

A:

Q: Problem 1. In a general linear regression set-up of the type Y = XB+ € where € ~ Nn(0, o²In).…

A: ANSWER: (i) Residual sum of squares (RSS) is defined as RSS = e'e, where e is a vector of residuals.…

Q: An urn contains 39 red, 29 white and 16 blue marbles. A child selects two marbles at random and…

A: Total Red Marbles = R=39 Total white Marbles = W=29 Total blue Marbles = B=16 Total Marbles=84

Q: ou want to obtain a sample to estimate the proportion of a population that possess a particular…

A: given data, p=0.15E=3%=0.03CI=0.98α=1-0.98=0.02n=?

Q: ou want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: given data , no reasonable estimate for the population proportion. assume that…

Q: If a population has a variance of 12, what is the STANDARD DEVIATION of the sampling distribution of…

A:

Q: A random variable is normally distributed. It has a mean of 241 and a standard deviation of 17. For…

A: given data, normal distributionμ=242σ=17we have to find out the given probabilties.

Q: What percent (to the nearest whole number) of the total seniors that will attend a 2-year college…

A: The tables shows the seniors and plans.

Q: An insurer issued a large number of policies to people age 50. Each policy is a 30-year endowment…

A: This question is about calculating the profit or loss of a group of policies issued by an insurer to…

Q: How does the concept of conditional probability impact decision making in real-world scenarios, and…

A: Conditional probability can be used to calculate the probability of an event A occurring, given that…

Q: How can we calculate the probability of a particular event occurring given a set of conditions, and…

A:

Q: A relative frequency distribution is given below for the size of families in the city of AnyTown,…

A: family size  frequency 2 4050 3 2330 4 1960 5 1070 6 390 7+ 200 Total 10000

Q: Two marbles are drawn in succession from a box containing 10 red, 20 white, and 30 blue. Find the…

A: We have given that Number of red marbles = 10  Number of white marbles = 20  Number of blue marbles…

Q: A researcher was interested in studying the best way to teach suturing and casting to surgical…

A: I used Minitab for my calculations.

Q: The following sample of observations was randomly selected. Use Excel. X: y: 4 4 5 3 6 5 6 7 a.…

A: The given data is as follows, x y 4 4 5 6 3 5 6 7 10 7 The simple linear regression…

Q: Consider the experiment of tossing a coin 2 times, with equal chance of obtaining H (head) and T…

A: The experiment is of tossing a coin twice. Let head denote 1 and tail denote 0. Let X = the no. of…

Q: Find the margin of error for the given values of c, o, and n. c = 0.90, o = 3.6, n = 81 Click the…

A: From given : c=0.90σ=3.6n=81

Q: Find The mean, median; mode & standard deviation For the following numbers. -2.3578

A: Given that : Sample data :2,3,5,7,8

Q: QUESTION 11 The daily sales of Hi-White toothpaste are believed to be right-skewed. For a random…

A: The sample size is 34, and the standard deviation is 15.36. The given margin of error is 5.88.

Q: A particular fruit's weights are normally distributed, with a mean of 399 grams and a standard…

A: given data, normal distributionμ=399σ=32we have to find out the heaviest 6 % of fruits weight =?

Q: A. What exponential equation, V(x) best fits the data, where x is the number of years after purchase…

A: Note that I used R software for calculations. Since B and D are right, I'll answer only A and C.

Q: QUESTION 27 What happens to the width of a confidence interval as the sample size decreases? The…

A: Ans#:- What happens to the width of a confidence interval as the sample size decreases?

Q: If a population has a mean of 7, what is the mean of the sampling distribution of its mean?

A: We have given that  Population mean=μ=7

Q: What are the cutoff numbers for the number of chocolate chips in acceptable cookies?

A: Let X be the random variable for the number of chocolate chips in a popular brand. X ~ N(μ=23,σ=1.3)…

Q: a) Calculate an estimate for the mean of the waiting times, by using an appropriate approximation to…

A: Here waiting time of the 128 customers is given. Waiting time f 0-30 29 30-60 17 60-90 17…

Q: Let X~ Uniform(0, 1) and pe (0, 1) be a positive number. Derive the cumulative distribution function…

A: a) To find the cumulative distribution function (CDF) of Y=-1λlog(X), we need to calculate P(Y≤y)…

Q: Your math test scores are 78,89,76,50,82 and 69 . The teacher says your average grade for the course…

A: We have given that the The data are 78,89,76,50,82 and 69

Q: Repeat the Procedure for n = 5 For the sample of n = 5 days averaged together, construct a…

A: Given information: Recipe X 1 1 2 5 3 2 4 5 5 6 6 1 7 2 8 6 9 5 10 2 11 5…

Q: st K Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and…

A: We have given that Mean(µ) = 100Standard deviations (σ) = 15X ~ N (µ, σ )= N(100, 15)