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iohanetc 2020-11-26Convert the binomial probability to a normal distribution probability using continuity correction.
P (x < 25).
slaggingV 2020-11-24The spinner below is divided into eight equal parts. Find the theoretical probability described below as a fraction.
P(greater than 2) =
P(greater than 2) =
nitraiddQ 2020-11-23What statistical test should she used if
What statistical test should she used if
smileycellist2 2020-11-23The accompanying two-way table was constructed using data in the article “Television Viewing and Physical Fitness in Adults” (Research Quarterly for Exercise and Sport, 1990: 315–320). The author hoped to determine whether time spent watching television is associated with cardiovascular fitness. Subjects were asked about their television-viewing habits and were classified as physically fit if they scored in the excellent or very good category on a step test. We include MINITAB output from a chi-squared analysis. The four TV groups corresponded to different amounts of time per day spent watching TV (0, 1–2, 3–4, or 5 or more hours). The 168 individuals represented in the first column were those judged physically fit. Expected counts appear below observed counts, and MINITAB displays the contribution to from each cell.
State and test the appropriate hypotheses using
The accompanying two-way table was constructed using data in the article “Television Viewing and Physical Fitness in Adults” (Research Quarterly for Exercise and Sport, 1990: 315–320). The author hoped to determine whether time spent watching television is associated with cardiovascular fitness. Subjects were asked about their television-viewing habits and were classified as physically fit if they scored in the excellent or very good category on a step test. We include MINITAB output from a chi-squared analysis. The four TV groups corresponded to different amounts of time per day spent watching TV (0, 1–2, 3–4, or 5 or more hours). The 168 individuals represented in the first column were those judged physically fit. Expected counts appear below observed counts, and MINITAB displays the contribution to from each cell.
State and test the appropriate hypotheses using
emancipezN 2020-11-22If x is a binomial random variable, find the probabilities below by using the binomial probability table.
a)
b)
c)
If x is a binomial random variable, find the probabilities below by using the binomial probability table.
a)
b)
c)
chillywilly12a 2020-11-22How to how to interpret scatterplots?
amanf 2020-11-22Answer true or false to each statement.
a. Two normal distributions that have the same mean are centered at the same place, regardless of the relationship between their standard deviations.
b. Two normal distributions that have the same standard deviation have the same spread, regardless of the relationship between their means.
a. Two normal distributions that have the same mean are centered at the same place, regardless of the relationship between their standard deviations.
b. Two normal distributions that have the same standard deviation have the same spread, regardless of the relationship between their means.
tricotasu 2020-11-20Find the specified areas for a standard normal density.
1.a.The area below z = 0.8.
b.The area above = 1.2.
c. The area between z = -1 and z = 2
1.a.The area below z = 0.8.
b.The area above = 1.2.
c. The area between z = -1 and z = 2
hexacordoK 2020-11-20An automatic machine in a manufacturing process is operating properly if the lengths of an important subcomponent are normally distributed with a mean of 116 cm and a standard deviation of 4.8 cm.
A. Find the probability that one selected subcomponent is longer than 118 cm.
B. Find the probability that if 4 subcomponents are randomly selected, their mean length exceeds 118 cm.
C. Find the probability that if 4 are randomly selected, all 4 have lengths that exceed 118 cm.
A. Find the probability that one selected subcomponent is longer than 118 cm.
B. Find the probability that if 4 subcomponents are randomly selected, their mean length exceeds 118 cm.
C. Find the probability that if 4 are randomly selected, all 4 have lengths that exceed 118 cm.
OlmekinjP 2020-11-20In 2014, the Centers for Disearse reported the percentage of people 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of 0.30.
a) How large a sample should be taken to estimate the proportion of smokers in the population with a margin of error of 0.02? Use 95% confidence.(Round your answer up to the nearest integer.)
b)Assume that the study uses your sample size recommendation in part (a) and finds 470 smokers. What is the point estimate of the proportion of smokers in the population? (Round your answer to four decimal places.)
c) What is the 95% confidence interval for the proportion of smokers in the population? (Round your answer to four decimal places.)
a) How large a sample should be taken to estimate the proportion of smokers in the population with a margin of error of 0.02? Use 95% confidence.(Round your answer up to the nearest integer.)
b)Assume that the study uses your sample size recommendation in part (a) and finds 470 smokers. What is the point estimate of the proportion of smokers in the population? (Round your answer to four decimal places.)
c) What is the 95% confidence interval for the proportion of smokers in the population? (Round your answer to four decimal places.)
Dolly Robinson 2020-11-17To calculate normal distributions values must be?
chillywilly12a 2020-11-17A small company is producing different clothes in 5 sizes total: 67, 65, 63, 67 and 62. Find
vestirme4 2020-11-17Which would you expect to have a density curve that is higher at the mean: the standard normal distribution or a normal distribution with standard deviation 0.5? Explain.
BenoguigoliB 2020-11-17(a) Give a brief outline describing how confidence intervals for means use the normal distribution or Student's t distribution in their basic construction.
glasskerfu 2020-11-16The most appropriate study design depends, among other things, on the distribution of
1.A) The risk factor in the population of interest
2.B) The participants
3.C) The outcome in the population of interest
4.D)
The most appropriate study design depends, among other things, on the distribution of
1.A) The risk factor in the population of interest
2.B) The participants
3.C) The outcome in the population of interest
4.D)
Reeves 2020-11-14What is the row of Pascal’s triangle containing the binomial coefficients (nk),
What is the row of Pascal’s triangle containing the binomial coefficients (nk),
pedzenekO 2020-11-12What is the ideal study design from a statistical point of view?
-Clinical trial
-Observational studies
-A&B
-None of the above
-Clinical trial
-Observational studies
-A&B
-None of the above
he298c 2020-11-12What is the probability that a randomly chosen location will have a snow depth between 2.25 and 2.75 inches
