n the large counts condition to use a normal distribution to approximate binomial probabilities, why do we require that both np and n(1−p) be at least 10?

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A z-score of 2.5 would indicate what with respect to the raw score's proximity to the distribution mean? A. That the raw score lies precisely 2.5 standard deviations above the mean B. That the modal category for the distribution lies 2.5 standard deviations below the mean C. That the raw score lies 2.5 standard deviations below the mean D. That the distribution has a mean of 2.5

When do you use normalpdf, normalcdf, and invnorm?

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A negative correlation means that ________. Select one: a. high values of one variable are associated with low values of the other b. high values of one variable are associated with high values of the other c. low values of one variable are associated with low values of the other d. there is no relationship between the two variables

Which of the following correlation coefficients indicates the strongest relationship between variables? 0.1 0.5 0.8 1.0

"What is the difference between simple linear regression and multiple regression? A. Simple linear regression has one independent variable, while multiple regression has two or more. B. Simple linear regression fits only one line to a scatter diagram, while multiple regression fits more than one line. C. Multiple regression has more than one dependent variable for each independent variable."

"Which of the following is an example of secondary data? A. Your company observes the behavior of people who visit your website. B. Your company conducts a customer profile survey. C. Your company collects and analyzes data from the U.S. Census. D. Your company collects credit card information from customers. Please select the best answer from the choices provided."

"Suppose T and Z are random variables. a. If P(T>2.81)=0.08 and P(T<−2.81)=0.08, obtain P(−2.81≤T≤2.81). b. If P(−0.84≤Z≤0.84)=0.60 and also P(Z>0.84)=P(Z<−0.84), find P(Z>0.84)."

"Which of the following best describes the shape of the chi-square distribution when the degrees of freedom are less than 10? A. Unimodal and symmetric B. Skewed to the right C. Skewed to the left D. Uniform E. Bimodal"

"When she was 9 years old, a girl conducted a science fair experiment to test if professional touch therapists could sense her energy field. She flipped a coin to select either her right hand or her left hand, then asked the therapists to identify the selected hand by placing their hand just under hers without seeing or touching it. Among the 274 trials, the touch therapists were correct 121 times. Use a 0.10 significance level to test the claim that touch therapists use a method equivalent to random guesses. Do the results suggest that touch therapists are effective?"

How do you find the p-value from a z-score on a TI-84 Plus calculator?

How can you find the range, variance, and standard deviation on a TI-84 calculator?

What is the critical value t ∗ for a 90% confidence interval when n=15? A. 1.645 B. 1.753 C. 1.761 D. 1.960

What is the sample variance of the following numbers: 2, 4, 6, 8, 10, 12, 14?

Calculate the standard deviation for the given data set: 10, 15, 18, 22, 36, 52

"What is the interquartile range of this set of data? 15, 19, 20, 25, 31, 38, 41 A. 6 B. 13 C. 19 D. 26"

"What is the difference between a bar graph and a histogram? A. There is no difference between a bar graph and a histogram. B. A bar graph displays categorical data, while a histogram displays quantitative data. C. A bar graph has no spaces between the bars, while a histogram must have space between the bars. D. A bar graph displays quantitative data, while a histogram displays categorical data."

"Compute a 75% Chebyshev interval around the mean for x values and y values. (Round your answers to two decimal places.) Mean for x: 10.5 Mean for y: 8.9 What is the lower limit for x? What is the upper limit for x? What is the lower limit for y? What is the upper limit for y?"

What is the mean absolute deviation of the following set of data: 10, 8, 10, 6, 6, 2, 10, 4?

Which statement best describes an experimental control? None of the answers are correct. A group of samples not subjected to the experimental changes made by the scientist. Variables observed in relationship to the variable manipulated by the researcher. Variable that scientists change within the experiment.

What is the z-score for a 98% confidence interval?

a. If your IQ is 130, the average population IQ is 100, and the standard deviation is 15, what is your z-score? b. How many standard deviations are above the mean? c. What does that suggest about your IQ compared to the population? d. If the average IQ of the population is 100 and the standard deviation is 15, what is the 95 percent confidence interval?

What is the difference between binompdf and binomcdf?

Identify the symbols used for each of the following: (a) Sample standard deviation (b) Population standard deviation (c) Sample variance (d) Population variance If sample data consist of weights measured in grams, what units are used for these statistics and parameters?

What is the estimated height of a building with six stories? Does the least squares line give an accurate estimate of height? Explain why or why not.

The farmer's experiment was widely considered to be well - designed and well - implemented. After 8 weeks, he found no differences between groups, and the berry harvest was still lower than in previous years. What can he conclude about his hypothesis?

Question: Discuss briefly a comparison of the two vineyard or for an analysis of a single vinegar, calculate the standard deviation and the relative standard deviation. DATA ANALYSIS C AND D # Vinegar Analysis Date: 10/30 Lab Sec. 9a) Name: Guelys Rosario Desk No. A. Preparation of Vinegar Sample Calculate the approximate volume of the vinegar sample needed for the analyses (Part A.1). $0.1 \mathrm{H}(0.2 \mathrm{SL})=0.0025 \mathrm{~mol}$ Decis mol $x 60 \mathrm{~cm}=0.137=30 \mathrm{~mL}$ Brand of vinegar or unknown no. 1. Mass of flask (g) 2. Mass of flask + vinegar (g) 3. Mass of vinegar (g) B. Analysis of Vinegar Sample 4. Burst reading of NaOH , oxical (mL) 5. Burst reading of NaOH , final (mL) 6. Volume of NaOH used (mL) 7. Molar concentration of NaOH (mol/L) 8. Moles of NaOH added (mol) 9. Moles of $\mathrm{CH}_{3} \mathrm{COOH}$ in vinegar (mol) 10. Mass of $\mathrm{CH}_{3} \mathrm{COOH}$ in vinegar (g) 11. Percent by mass of $\mathrm{CH}_{3} \mathrm{COOH}$ in vinegar (\%) 12. Average percent by mass of $\mathrm{CH}_{3} \mathrm{COOH}$ in vinegar (\%) *Calculations for Trial 1 of the first vinegar sample on next page.

How do you find the correlation coefficient on a TI-84 Plus calculator?

Explain what it means to have a positive percent error value and a negative percent error value.

How many babies are born in the world every second?

How do you calculate the expected count in a chi-square test?

The retirement age for NFL players is bell-shaped (normally distributed) with: A mean (μ) of 33.7 years old, A standard deviation (σ) of 2.1 years. a) What two values will approximately 99% of all NFL players' retirement ages fall between? b) Estimate the percentage of NFL players who retire between the ages of 29.5 and 37.9 years. c) Estimate the percentage of NFL players who retire between the ages of 31.6 and 35.8 years.

Which of the following best describes the external validity of an experiment? A. The degree to which the results of the study are due to the treatment implemented. B. The degree to which the results of the study would happen in the real world. C. The degree to which the data support the research hypothesis. D. The degree to which the changes in the dependent variable are caused by the independent variable.

"SSE can never be A. larger than SST B. smaller than SST C. equal to 1 D. equal to zero"