2022-01-29
Answered

Under the normal curve, the probability of a score occurring below the mean is
0
68%
2 to 1
.50

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alenahelenash

Answered 2022-03-09
Author has **368** answers

Under the normal curve, the probability of a score occurring below the mean is .50

asked 2021-03-07

A parks and recreation department is constructing a new bike path. The path will be parallel to the railroad tracks shown and pass through the parking area al the point $(4,\text{}5).$ Write an equation that represents the path.

asked 2021-02-25

Aurora is planning to participate in an event at her school's field day that requires her to complete tasks at various stations in the fastest time possible. To prepare for the event, she is practicing and keeping track of her time to complete each station. The x-coordinate is the station number, and the y-coordinate is the time in minutes since the start of the race that she completed the task. $(1,3),(2,6),(3,12),(4,24)$

Part A: Is this data modeling an algebraic sequence or a geometric sequence? Explain your answer.

Part B: Use a recursive formula to determine the time she will complete station 5.

Part C: Use an explicit formula to find the time she will complete the 9th station.

Part A: Is this data modeling an algebraic sequence or a geometric sequence? Explain your answer.

Part B: Use a recursive formula to determine the time she will complete station 5.

Part C: Use an explicit formula to find the time she will complete the 9th station.

asked 2021-01-06

A weather forecaster predicts that the temperature in Antarctica will decrease ${8}^{\circ}F$ each hour for the next 6 hours. Write and solve an inequality to determine how many hours it will take for the temperature to drop at least ${36}^{\circ}F$

asked 2020-11-20

The article “Modeling Sediment and Water Column Interactions for Hydrophobic Pollutants” (Water Research, 1984: 1169-1174) suggests the uniform distribution on the interval (7.5, 20) as a model for depth (cm) of the bioturbation layer in sediment in a certain region. a. What are the mean and variance of depth? b. What is the cdf of depth? c. What is the probability that observed depth is at most 10? Between 10 and 15? d. What is the probability that the observed depth is within 1 standard deviation of the mean value? Within 2 standard deviations?

asked 2022-03-08

You are conducting a multinomial hypothesis test for the claim that all 5 categories are equally likely to be selected. Complete the table.

$\begin{array}{|cccc|}\hline \text{Category}& \text{Observed Frequency}& \text{Expected Frequency}& \text{Squared Pearson Residual}\\ \text{A}& 18\\ \text{B}& 10\\ \text{C}& 15\\ \text{D}& 17\\ \text{E}& 17\\ \hline\end{array}$

What is the chi-square test-statistic for this data?

${\chi}^{2}=$

Report all answers accurate to three decimal places.

What is the chi-square test-statistic for this data?

Report all answers accurate to three decimal places.

asked 2022-01-17

How do you calculate the standard deviation of 3.4, 6.1, 7.3, 4.5, 2.3, 4.4, 9.4, 3.4, 2.3, 7.2?

asked 2021-02-19

A population of values has a normal distribution with

Find the probability that a single randomly selected value is between 193 and 244.3.

Write your answers as numbers accurate to 4 decimal places.