Descriptive
How do you use the calculator to find the range of a dataset?
STAT → 1: Edit (enter data into list) → STAT → CALC → 1: 1-Var Stats → 2nd → List Name (ex: L1 = 1) → Enter → Range = max of X - min of X (both of which are given by the calculator)
1. What is the difference between the PDF and CDF?
PDF is the probability that a random variable will take a value exactly equal to the random variable. CDF is the probability that a random variable will take a value less than, more than, or equal to the random variable.
1. This function calculates the correlation coefficient between two variables
LinReg (ax + b)
1. This calculator function is used to find the confidence interval for a population mean.
T-Interval
1. How do you clear a data set on a calculator?
STAT → 1: Edit → Highlight list you want to clear → CLEAR → Enter
This function on the calculator gives you the mean of a dataset.
1-Var Stats
STAT → 1: Edit → STAT → CALC → 1-Var Stats → 2nd → List Name → mean = x-bar
2. This calculator function is used to find the probability of a value being between two values in a normal distribution.
normCDF. Input the lower and upper bounds along with the mean and standard deviation.
2. How is the least squares regression line calculated on the calculator?
STAT → 1: Edit → Enter Data → STAT → CALC → 4: LinReg(ax+b) → enter L1 and L2 → Enter → calculator will display regression equation and values of slope, intercept, and correlation coefficient
2. Describe how to perform a hypothesis test for a population mean using the calculator.
STAT → 1: Edit → Enter Data → STAT → TESTS → 2: T-Test → Stats, enter sample mean, standard deviation, and sample size → enter the hypothesized mean (0), the alternative hypothesis (≠, < or >), and the confidence level if applicable → Enter → test-statistic, p-value, confidence interval → Interpret p-value to decide whether to reject or fail to reject the null hypothesis
2. How do you enter data into lists on the calculator?
STAT → 1: Edit
Explain how to use the calculator to generate a boxplot for a dataset
STAT → 1: Edit → 2nd → Y= → 1: Plot 1 → Enter → Turn plot on → Enter → Boxplot icon → enter → X-list, Freq = 1 → Zoom → 9: ZoomStat for visual display
3. This calculator function calculates the expected value of a continuous random variable.
Multiply the x value times the probability of that x value and add all of those multiplied values together.
3. What is the significance of the correlation coefficient in regression analysis?
The correlation coefficient measures the strength and direction of the linear relationship between two variables. Its value ranges from -1 to 1. 0 means no linear relationship. The closer r is to 1 or -1, the stronger the linear relationship between two variables.
3. What is the function on the calculator to perform a t-test for the difference between two population means?
2-Samp T-Test
3. How do you clear your calculator?
2nd + → 7: Reset → 1: All Ram → 2: Reset → Enter
4. This calculator function can give you the five-number summary of a dataset.
STAT → 1: Edit → STAT → CALC → 1: Var-Stats → 2nd → List Name → Calculator displays statistics (minimum, first quartile, median, third quartile, and maximum)
4. Describe how to use the calculator to find the probability density function (PDF) of a continuous random variable.
Use normPDF and input the variable (ex: x = 1)
4. How do you interpret the p-value in regression analysis?
The p-value helps determine the significance of the results. It tests the null hypothesis that the slope of the regression line is zero (no relationship between x and y). A low p-value indicates that the slope is significantly different from 0 and there is a significant linear relationship between two variables. A high p value suggests that the slope is not significantly different from zero and there is no significant linear relationship between the two variables.
4. This calculator function calculates the degrees of freedom for a t-distribution.
Usually calculated automatically within the T-Test and 2-Samp T-Test. Calculator doesn’t have a standalone function for calculating degrees of freedom.
4. When was the graphing Calculator invented?
1985
5. What is the formula to calculate the variance?
2=1N(x - xbar)2for population
s2 =1n-1(x-xbar)2 for sample
5. How do you use the calculator to find the probability of a value falling within a certain range in a normal distribution?
normCDF (lower bound, upper bound, mean, standard deviation)
5. Explain the meaning of R-squared in regression analysis.
The coefficient of determination or R-squared measures the proportion of the variance in the dependent variable that is predictable from the independent variable. It ranges from 0 to 1. If it is 0, the regression line does not explain any of the variability in y. If it is 1, the regression line perfectly fits the data, meaning the variability in y is explained completely by x.
5. Describe how to use the calculator to perform a chi-square goodness-of-fit test.
STAT → 1: Edit → Enter Data → STAT → TESTS → D: x2GOF-Test → Enter observed frequencies (L1) and expected frequencies (L2), enter degrees of freedom (n-1) → Enter → test statistic, p-value → Interpret p-value to decide whether to reject of fail to reject the null hypothesis (typically states that the observed frequencies follow the expected distribution)
5. Which sub thought that someones calculator was a large phone?
I don’t remember her name but she had a braid and glasses