Classify the following random variables as discrete or continuous. 1. X= the number of mobile phones sold in one week in AB store 2. Y = the weights in pounds of newly born babies in a hospital nursery 3. X= the number of cars in a parking lot every noon

Q: 13) Modal class: LB mo = 15.5 D₁ = 4 Mode: 14-15. = LBmo + UUR D₂ = 3 i= D₁ D₁ + D₂ i=5

A: Given LBmo=15.5 D1=4 D2=3 i=5

Q: An airline knows from experience that the distribution of the number of suitcases that get lost each…

A: GivenMean(μ)=15.5standard deviation(σ)=3.6

Q: Suppose the following information is collected on an application for a loan.   a. Insurance…

A: The question is about type of data There are two types of data : Categorical Data : The data which…

Q: Studies indicate that excessive noise at night can affect weight gain. One study of n = 127 rats…

A:

Q: Which of the following is the best level of significance for hypothesis testing? a. 0.10 b. 0.05…

A: The objective is to find out the best level of significance for hypothesis testing.

Q: Find the critical value ze that corresponds to a 95% confidence level. O A. 1.645 OB. +2.33 O C.…

A: We have given that,  Confidence level = 95% then we will find the critical value (zc) = ?

Q: The following data represent the growth of a population of fruit flies over a 6-week period. Test…

A:

Q: A researcher reports that the average IQ level of students in Alaminos City  National High School…

A: Givenx=106μ=110s=9df=n-1=20-1=19n=20α=0.05

Q: 10. Find the standard deviation. A. 2.15 B. 3.25 C. 4.32 D. 5.64

A: Given Data: Class Frequency 15-17 2 12-14 6 9-11 4 n  12

Q: Consider the listed actual demand in the table to the left. If the 6-week moving average forecast…

A: The question is about forecasting Given :

Q: Scenario 3It was reported that 54% of kids said that they had snack after school. A random sample of…

A: Solution-: Given: n=60, x=36, P0=0.54, α=0.10 We want to  (a) Identify the null and alternative…

Q: Consider the following scatterplot that shows one year's total sales (revenue) and profits for eight…

A: The strength and direction of linear relationship between two variables is measured by correlation.

Q: 9. A random sample of 16 values from a normal population showed a mean inches. of 41.5 inches and…

A: Given: Sample size n = 16 Sample mean X = 41.5 Sum of square of deviations Xi-X2 = 135 Formula used:…

Q: An advertising agency collected a random sample of 300 businesses targeted with an advertising…

A: The question is about hypo. testing for a popl. proportion. Given : No. of random sample of…

Q: Consider the following claim. Ho : p =10 H : μ > 10 Use the following information: n = 24, X = 12.7,…

A: a) Given data : sample size, n =24 sample mean, x̄ = 12.7 sample standard…

Q: Find k such that the function is a probability density function over the given interval. Then write…

A: Given,f(x)=k(3-x)     ;   0≤X≤3

Q: A simple random sample of 36 Chowchow dog weights yields a sample mean of 193 pounds. It is known…

A:

Q: Among those students identified as having "High Stress Levels", what is the probability that they…

A: Conditional probability of an event is the chance of occurrence of an event given that another event…

Q: 3) The table below describes the smoking habits of a group of asthma sufferers. Occasional Regular…

A: 3) The number of people is regular smoker is 145 and the number of people is heavy smokers is 70.

Q: The following display from a TI-84 Plus calculator presents the results of a hypothesis test for a…

A:

Q: Scenario 2: The breaking strength of cables produced by a manufacturer have a mean of 1800 lb and a…

A: Given that  The breaking strength of cables produced by a manufacturer have a mean of 1800 lb and a…

Q: Carry your intermediate computations to at least three decimal places. Round your answers to one…

A: given data : 2.23,1.76,0.43,0.99,-2.9,-0.35,1.69,-0.1,-0.62,-1.48,-2.53,1.15 from the…

Q: Scenario 2: The mean content of 25 bottles of brand S mango juice is 255 ml with a standard…

A: Hypothesis Testing: Hypothesis testing is the process of determining whether the findings of a…

Q: Scenario 4: A researcher investigated the relationship between family income and their savings.…

A: Claim : there is a significant relationship between the two variables.

Q: A headline on a news website stated “Sheep with a varied diet grew faster and produced less…

A: To find: (i)    Is the study reported on an experiment or an observational study? Explain your…

Q: A student researcher was surprised to learn that the 2017 NCAA Student-Athlete Substance Use Survey…

A: Since the question to be answered is not specified, we'll be answering only the first question.…

Q: Eleven regions in the Congolese rain forest are randomly sampled. In each region rainfall was…

A:

Q: Four surgical procedures currently are used to install pacemakers. If the patient does not need to…

A: Solution-: Given: α=0.05 We have following table:   A B C D Clear 27 41 21 7 Return 11 15 9…

Q: The p-value for this test is 0.016 (3dp). Make a decision and conclusion for the hypothesis test in…

A: The researcher draws conclusion of the hypothesis test using the p-value method.

Q: Scenario 1: The percentage of A's given in a physics course at a university over a long period of…

A:

Q: Compute the R² for the regression. The R² for the regression is- (Round your response to three…

A: Given : Total sample =330 Total number of regressors=6   Note:since you have asked specifically the…

Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.25…

A: Given,n=1908x=439p^=xnp^=4391908=0.2301

Q: a. For this study, we should use Select an answer b. The null and alternative hypotheses would be:…

A: The hypothesized proportion is 0.54.

Q: 2. The mean age of 30 student volunteers in a community pantry is 17.5 year standard deviation of 2…

A: The mean age of 30 student is 17.5 with standard deviation 2 years n=30x=17.5s=2At 99% confidence…

Q: Consider the fitted values from a simple linear regression model with intercept: yˆ = 7 + 4x. Assume…

A: Formula : R^2 = SSR/SST

Q: Find the cumulative density function for the given probability density function. -1.7x k(x) = 1.7 e…

A:

Q: Test A. Directions: Analyze the given problem below. As per Beat Covid-19 Today, a Covid-19…

A: Given no. of active cases (region wise) is:

Q: The number of orders received daily by an online vendor of used CDs is normally distributed with…

A: The provided information is  µ=210 σ=20 P(X≥246)…

Q: Verify Property 2 of the definition of a probability density function over the given interval.…

A: Given: X~Exp(α=17)  f(x)=17e-17x   [0,∞)

Q: IQ test scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the…

A: given; let X : IQ test scores X~N(μ,σ)where mean(μ)=100          and standard deviation(σ)=15

Q: A stack contains 20 white balls, 8 green balls and 12 brown balls. 2 balls are drawn at random…

A: Given,no.of green balls=8no.of brown balls=12Total no.of balls=20

Q: A college would like to estimate the proportion of its students that work full-time while going to…

A: It is given that the sample size (n) is 650 and x is 178.

Q: Scenario 4: A researcher wants to study about the relationship between a students' grade in…

A: The provided information is  r=0.43 n=23 α=0.05 Interpretation: The correlation coefficient is 0.43…

Q: 9. A random sample of 16 values from a normal population showed a mean of 41.5 inches and the sum of…

A: Given Information: Sample size n=16 Sample mean x¯=41.5 SS = 135 The hypothesized value of…

Q: Considering the aggregated demand for coffee beans for the following months shown below, what would…

A: Data is given for 6 months, We have to calculate forcast for 8 th month. We will use 3 months moving…

Q: Suppose that X1, X2, X3 and X4 are all independent random variables, each with a normal…

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Q: According to the IRS, individuals filing federal income tax returns prior to March 31 received an…

A:

Q: A road transport company has one reservation clerk on duty at a time. He handles information of bus…

A: The question is about queuing model Given : Customer arrival rate ( λ ) = 8 per hour Average service…

Q: epresents the sequential quarter number and Q=1 represents the first quarter of 2018. In addit…

A: *Answer:  Given,  D = 127 + 0.47(Q) for first quarter  of year 2023 ,Q = 21    Demand For first…

Q: A regulation golf ball should weigh 45 grams. A company produces golf balls for the PGA. To help…

A: