vocabulary
Use t interval when n <
Find the margin of error for an interval (120,180)
30
If 260 parents said they do not have health insurance for the children and there are 2600 in the total population, what is the p hat?
.10
Find the critical values for a 90% CI sample size 20
10.117 & 30.144
What two sports does Mr. Arlo coach?
bowling & baseball
Given the p-hat and the n, how do you find x?
multiply p hat by n
Find the minimum sample size, given z = 2.575, E = .1 and Sx = 2.0
2653
Recently a survey was done to see the amount contributed to a church fund. Approximately 65% of the funds came from 420 people. What is the approximate total population of the congregation?
646
Find the critical values for a CI = .95 and n = 20
9.764 & 30.191
What is Mrs. Slusher middle name?
Louise
n -1 is the formula for ...
the degree of freedom
Construct the 99% confidence interval for a mean of 78, standard deviation of 5.4 and a sample size of 23.
(74.83,81.74)
Find the point estimate, given the sample size of 1300, with 350 people against the ban of cigarette smoking?
.73
To find the standard deviation interval the chi squared value is divided into the n-1 and sample standard deviation. Which one is squared?
sample standard deviation
How old was Mr. Lindley when he graduated high school?
16
point estimate is another name for the
mean
Mrs. Schab selected 15 fast food restaurants and the mean number of calories in a burger was 450 with a standard deviation of 30 calories. What is the 95% confidence interval?
433.39,466.61
Mr. Wyckoff reported that 352 of 1419 students scored proficient in reading on the last KY state core standards test. Find the 95% confidence interval for the proportion of students who are proficient?
(.2256,.2705)
What value(s) can x2 be?
The chi squared value is always > 0
What does Mrs. Good teach this year?
Geometry only!
if a preliminary estimate is not available, use p -hat and q -hat = __ , for finding the sample size in a proportion.
.5
Find the minimum sample size for a confidence level of 90%, E = .12 and stand deviation of 2.6
1263
Find the minimum sample size required for a population proportion given p hat is .23 C = .95 and E = .25
11
Find the interval for a 90% CI given the standard deviation is 26 and the sample size is 10.
18.96, 42.78
What faculty member, who graduated from CHS in 1990, was voted "most school spirit" senior superlative ?
Mr. Wyckoff