A study on exercise habits used a random sample of 2,540 college students (1,220 females and 1,320 males).The study found the following:818 of the females in the sample exercise on a regular basis.924 of the males in the sample exercise on a regular basis.The average time that the 1742 students who exercise on a regular basis (818 + 924) spend exercising per week is 4.2 hours.What is the point estimate for the proportion of all female college students who exercise on a regular basis? (Numbers are rounded to two decimal places as needed.)  Incorrect. You need to find what proportion of the females in the sample exercise on a regular basis. It looks like you incorrectly used the total sample size (2,540) in the denominator.xReset this ActivityWhat is the point estimate for the proportion of all college students who exercise on a regular basis? (Numbers are rounded to two decimal places as needed.)

Teacher Joy conducted a census in her class, and she found out that the average time that her students devote to studying is 2.25 hours, their average height is 147 cm, and a random sample of 10 students got an average of 87% in their latest quiz.Which of the given numbers is a sample?*1 point10 Students2.25 Hours147 cm87%

Sir Gary randomly chose five students from his class of 40 and found out that these five students devote an average of 1.6 hours daily for play and recreational activities.Which of the given numbers is a statistic?*1 pointPopulation sizeAverage time spent asleepSample sizeAverage length of playing time

A psychology researcher was conducting a study about newlywed heterosexual couples during the first two years of their marriage. 513 newlywed couples were randomly chosen for the study. One of the questions that the researcher was interested in was "During a typical week, how many times do you have sex?" The 513 responses had an average of 2.35 and standard deviation of 1.2. Another question that was asked is "During a typical week, how many evenings do you go out?" 171 of the couples answered that they go out more than twice a week.What is the point estimate for the proportion of all newlyweds who go out more than twice during a typical week?

In a recent study, 1,115 males 25 to 35 years of age were randomly chosen and asked about their exercise habits. Based on the study results, the researchers estimated the mean time that a male 25 to 35 years of age spends exercising with 90%, 95%, and 99% confidence intervals. These were (not necessarily in the same order):For which of the three intervals do you have the most confidence that it captures the population mean (μ)?(3, 4)(2.5, 4.5)(2, 5)The confidence interval in which you have the most confidence that it captures the population mean μ must be:the 90% confidence intervalthe 95% confidence intervalthe 99% confidence intervalWhich of the three confidence intervals provides the most precise estimation?(3, 4)(2, 5)(2.5, 4.5)The confidence interval that provides the most precise estimation, must be:the 99% confidence intervalthe 95% confidence intervalthe 90% confidence interval

A simple random sample of seven (7) students is selected, and the students are asked how much time they spent studying for their University subjects (combined) outside class times. From past experience, it is known that these times (in hours) are distributed normally.The times (in hours) for the sample of students are as follows:2.3 7.2 4.5 12.5 6.6 2.5 5.5Based on these results, a confidence interval estimate for the population mean is found to be 5.9 ± 2.6.The level of confidence the researcher has used is closest to:-Group of answer choices95%90%97.5%99%