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what is variable

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A: The provided details:

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Q: Number 40 A B C

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Q: 1, 2, 3, and 4 are events. 1and 2 are mutually exclusive and independent.P(1) = 0.4. P(1∩3) = P(2 ∩ ...

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Q: 1.) The mean monthly utility bill for a sample of households in a city is $178.95 with a standard de...

A: Mean utility bill, µ= $178.95Standard deviation, σ = $13.45

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A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,...

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A: The aim is to find the range of p-value.

Q: Listed below are the amounts of mercury (in parts per million, or ppm) found in tuna sushi sample...

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Q: A personnel director in a particular state claims that the mean annual income is the same in one of ...

A: According to the given question, in order to test that the annual income is the same in one of the ...

Q: Members of the school committee for a large city claim that the population mean class size of a midd...

A: According to the question,H0: μ=20 versus Ha: μ<20We have n = 35Level of significance = 0.05t = -...

Q: A simple random sample of n=23 professors at a local community college have a mean course evaluation...

A: Solution:Null and alternative hypotheses:Null hypothesis: µ = 4Alternative hypothesis: µ ≠ 4Test sta...

Q: A recent poll by the American Automobile Club found that 74.5% of those surveyed are worried about a...

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Q: In a study of cell phone usage and brain hemispheric dominance, an Internet survey was e-mailed to 6...

A: The provided details:

Q: Directions: Draw the normal curve and shade the specific region show formulas A random same of 2...

A: Confidence interval:The (1-α) % confidence interval for proportion p is given by,

Q: Using 50 random numbers given below, compute the mean and standard deviation 0.299752 0.939920 0.427...

A: Standard deviation of a sample tells how the values are spread out from mean of the sample. A low st...

Q: What is the condition on the probability of success p that will guarantee the histogram of a binomia...

A: The binomial distribution has p - probability of success and n- number of trails. The binomial distr...

Q: Suppose that in a random selection of 100 colored candies, 21% of them are blue. The candy company c...

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Q: Suppose you are assigned the number 1, and the other students in your statistics class call out cons...

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Q: Given a standardized normal distrubtion (with a mean of 0 and a standard deviation of 1, as in Table...

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A: In such cases, you can turn to Repeated measures ANOVA which can detect differences in mean scores ...

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Q: The CEO of a cable company claims that the population mean wait time for callers at a company's cust...

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Q: Flying over the western states with mountainous terrain in a small aircraft is 40% riskier than flyi...

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Q: Use the normal distribution of SAT critical reading scores for which the mean is 513513 and the stan...

A: NOTE:Since, the numbers on the values of mean and standard deviation are repeating twice (513513 and...

Q: Rolling two dice. If two dice are rolled one time, find the probability of getting these results. A...

A: Probability of an event:The probability of an event is the number of favourable cases for an event d...

Q: Part a, b, and c

A: Null and alternative hypothesis:Null Hypothesis:A null hypothesis is a statement regarding the popul...

Q: What’s the mean annual return of the S&P 400 Midcap Index over the past 7 years? What’s the sta...

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Q: The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.30...

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Q: A biologist looked at the relationship between number of seeds a plant produces and the percent of t...

A: The estimated regression line is as follows:

Q: Part G-I, explain TI84 USE IF APPLICABLE

A: g) Computation of F-statistic:F-statistic can be obtained by dividing the mean square of model by th...

Q: A student takes a multiple-choice test that has 20 questions. Each question has five choices. The st...

A: Binomial distribution:It is a discrete probability distribution in which each trials have exactly tw...

Q: A grocery store manager did a study to look at the relationship between the amount of time (in minut...

A: The estimated regression line is as follows:

Q: Need help with (d) part. Thank you. statistical program is recommended. Electromagnetic technolog...

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Q: Do heavier cars really use more gasoline? Suppose a car is chosen at random. Let x be the weight of ...

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Q: Vocabulary for these terms • correlation • scatterplot • positive correlation • negative correlation...

A: Correlation: It is the linear relationship between the two variables. Scatterplot: It is the graph t...

Q: I need help understanding observational units, variables, how to formulate research questions.

A: Solution:Observational units:Observational units are the objects or entities on which information co...

Q: Let’s say you have a study looking at the DV “Time to help”. Your IV is whether potential helpers di...

A: Cohen's d is a type of effect size that represents the degree to which a null hypothesis is false. ...

Q: Let x represent the dollar amount spent on supermarket impulse buying in a 10-minute (unplanned) sho...

A: given x represent the dollar amount spent on supermarket impulse buying in a 10-minute shopping inte...

Q: Part b, c, d

A: Part b:Denote μ as the true mean breaking strength (after 24 hours) of the new bonding adhesive.The ...

Q: Number 2 Please, Explain shortcut with TI84 if applicable

A: Given sample size n = 36Sample mean = 44Sample standard deviation = 5.2Level of significance = α = 0...

Q: Test the hypotheses of Ho: sigma is equal to 0.56 versus Ha: sigma not equal to 0.56 using a 5% sign...

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Q: Given that z is a standard normal random variable, find z for each situation (to 2 decimals) a. The ...

A: a.The area to the left of z is 0.209 can be written as P(Z < z)=0.209.In the z-table for negative...

Q: A population has a mean of 15 and standard deviation of 3. Round the answers to two decimal places a...

A: Let X be the observation. X follows normal distribution with mean μ = 15 and the standard deviation ...

Q: It is thought that basketball teams that make too many fouls in a game tend to lose the game even if...

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you. ...