The reading speed of second grade students in a large city is approximately normal, with a mean of 91 words per minute (wpm) and a standard deviation of 10 wpm. Complete parts (a) through (f). Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) What is the probability a randomly selected student in the city will read more than 95 words per minute? The probability is (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the answer box within your choice. O A. If 100 different students were chosen from this population, we would expect to read less than 95 words per minute. O B. If 100 different students were chosen from this population, we would expect to read exactly 95 words per minute. O C. If 100 different students were chosen from this population, we would expect to read more than 95 words per minute. (b) What is the probability that a random sample of 12 second grade students from the city results in a mean reading rate of more than 95 words per minute? The probability is (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the answer box within your choice. O A. If 100 different samples of n= 12 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of less than 95 words per minute. O B. If 100 different samples of n= 12 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of more than 95 words per minute. O C. If 100 different samples of n= 12 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of exactly 95 words per minute. (c) What is the probability that a random sample of 24 second grade students from the city results in a mean reading rate of more than 95 words per minute? The probability is (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the answer box within your choice. O A. If 100 different samples of n 24 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of more than 95 words per minute. O B. If 100 different samples of n=24 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of exactly 95 words per minute.

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The reading speed of second grade students in a large city is approximately normal, with a mean of 91 words per minute (wpm) and a standard deviation of 10 wpm. Complete parts (a) through (f).
Click here to view the standard normal distribution table (page 1).
Click here to view the standard normal distribution table (page 2).
(a) What is the probability a randomly selected student in the city will read more than 95 words per minute?
The probability is
(Round to four decimal places as needed.)
Interpret this probability. Select the correct choice below and fill in the answer box within your choice.
O A. If 100 different students were chosen from this population, we would expect
to read less than 95 words per minute.
O B. If 100 different students were chosen from this population, we would expect
to read exactly 95 words per minute.
O C. If 100 different students were chosen from this population, we would expect
to read more than 95 words per minute.
(b) What is the probability that a random sample of 12 second grade students from the city results in a mean reading rate of more than 95 words per minute?
The probability is
(Round to four decimal places as needed.)
Interpret this probability. Select the correct choice below and fill in the answer box within your choice.
O A. If 100 different samples of n= 12 students were chosen from this population, we would expect
sample(s) to have a sample mean reading rate of less than 95 words per minute.
O B. If 100 different samples of n= 12 students were chosen from this population, we would expect
sample(s) to have a sample mean reading rate of more than 95 words per minute.
O C. If 100 different samples of n= 12 students were chosen from this population, we would expect
sample(s) to have a sample mean reading rate of exactly 95 words per minute.
(c) What is the probability that a random sample of 24 second grade students from the city results in a mean reading rate of more than 95 words per minute?
The probability is
(Round to four decimal places as needed.)
Interpret this probability. Select the correct choice below and fill in the answer box within your choice.
O A. If 100 different samples of n=24 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of more than 95 words per minute.
O B. If 100 different samples of n 24 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of exactly 95 words per minute.
Click to select your answer(s)
Transcribed Image Text:The reading speed of second grade students in a large city is approximately normal, with a mean of 91 words per minute (wpm) and a standard deviation of 10 wpm. Complete parts (a) through (f). Click here to view the standard normal distribution table (page 1). Click here to view the standard normal distribution table (page 2). (a) What is the probability a randomly selected student in the city will read more than 95 words per minute? The probability is (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the answer box within your choice. O A. If 100 different students were chosen from this population, we would expect to read less than 95 words per minute. O B. If 100 different students were chosen from this population, we would expect to read exactly 95 words per minute. O C. If 100 different students were chosen from this population, we would expect to read more than 95 words per minute. (b) What is the probability that a random sample of 12 second grade students from the city results in a mean reading rate of more than 95 words per minute? The probability is (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the answer box within your choice. O A. If 100 different samples of n= 12 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of less than 95 words per minute. O B. If 100 different samples of n= 12 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of more than 95 words per minute. O C. If 100 different samples of n= 12 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of exactly 95 words per minute. (c) What is the probability that a random sample of 24 second grade students from the city results in a mean reading rate of more than 95 words per minute? The probability is (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the answer box within your choice. O A. If 100 different samples of n=24 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of more than 95 words per minute. O B. If 100 different samples of n 24 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of exactly 95 words per minute. Click to select your answer(s)
Click here to view the standard normal dist on table (page 1).
(Type integers or decimals roading program at school. After 10 weeks in the program, it was found that the mean reading speed of a random sample of 19 second grade students was 93.1 wpm. What might you conclude based on this resut? Select the comrect choice below and Sin the answer baxes within your choice
This Test: 18 p
The reading speed of second grade students in a large city is approximately normal, with a mean of 91 words per minute (wpm) and a standard deviation of 10 wpm. Complete parts (a) through (f)
Question Help
Click here to view the standard normal
table (page 21
OC. If 100 different samples ofn=12 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of exactly 95 words per minute.
(c) What is the probability that a random sample of 24 second grade students from the city results in a mean reading rate of more than 95 words per minute?
The probability is n
(Round to four decimal places as needed.)
Interpret this probability. Select the correct choice below and fill in the answer bax within your choice
O A. If 100 different samples ofn=24 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of more than 95 words per minute.
O B. If 100 different samples ofn=24 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of exactly 95 words per minute
OC. If 100 different samples ofn=24 students were chosen from this population. we would expect sample(s) to have a sample mean reading rate of less than 95 words per minute.
(d) What effect does increasing the sample size have on the probability? Provide an explanation for this result
O A. Increasing the sample size increases the probability because a, increases as n increases
O B. Increasing the sample size decreases the probability because o decreases asn increases
OC. Increasing the sample size increases the probability because o, decreases as n increases
O D. Increasing the sample size decreases the probability because a; increases as n increases
(e) A teacher instituted a new
rounded to four decimal places as needed.)
O A. Amean reading rate of 93.1 wpm is unusual since the probability of obtaining a result of 93.1 wpm or more is This means that we would expect a mean reading rate of 93.1 or higher from a population whose mean reading rate is 91 in of every 100 random samples of size n= 19 students. The new program is
abundantly more effective than the old program.
O B. A mean reading rate of 93.1 wpm is not unusual since the probability of obtaining a result of 93.1 wpm or more is This means that we would expect a mean reading rate of 93.1 or higher from a population whose mean reading rate is 91 in of every 100 random samples of size n= 19 students. The new
program is not abundantly more effective than the old program.
(1) There is a 5% chance that the mean reading speed of a random sample of 23 second grade students will exceed what value?
There is a 5% chance that the mean reading speed of a random sample of 23 second grade students will exceed wpm (Round to two decimal places as needed.)
Click to select your answer(s)
Transcribed Image Text:Click here to view the standard normal dist on table (page 1). (Type integers or decimals roading program at school. After 10 weeks in the program, it was found that the mean reading speed of a random sample of 19 second grade students was 93.1 wpm. What might you conclude based on this resut? Select the comrect choice below and Sin the answer baxes within your choice This Test: 18 p The reading speed of second grade students in a large city is approximately normal, with a mean of 91 words per minute (wpm) and a standard deviation of 10 wpm. Complete parts (a) through (f) Question Help Click here to view the standard normal table (page 21 OC. If 100 different samples ofn=12 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of exactly 95 words per minute. (c) What is the probability that a random sample of 24 second grade students from the city results in a mean reading rate of more than 95 words per minute? The probability is n (Round to four decimal places as needed.) Interpret this probability. Select the correct choice below and fill in the answer bax within your choice O A. If 100 different samples ofn=24 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of more than 95 words per minute. O B. If 100 different samples ofn=24 students were chosen from this population, we would expect sample(s) to have a sample mean reading rate of exactly 95 words per minute OC. If 100 different samples ofn=24 students were chosen from this population. we would expect sample(s) to have a sample mean reading rate of less than 95 words per minute. (d) What effect does increasing the sample size have on the probability? Provide an explanation for this result O A. Increasing the sample size increases the probability because a, increases as n increases O B. Increasing the sample size decreases the probability because o decreases asn increases OC. Increasing the sample size increases the probability because o, decreases as n increases O D. Increasing the sample size decreases the probability because a; increases as n increases (e) A teacher instituted a new rounded to four decimal places as needed.) O A. Amean reading rate of 93.1 wpm is unusual since the probability of obtaining a result of 93.1 wpm or more is This means that we would expect a mean reading rate of 93.1 or higher from a population whose mean reading rate is 91 in of every 100 random samples of size n= 19 students. The new program is abundantly more effective than the old program. O B. A mean reading rate of 93.1 wpm is not unusual since the probability of obtaining a result of 93.1 wpm or more is This means that we would expect a mean reading rate of 93.1 or higher from a population whose mean reading rate is 91 in of every 100 random samples of size n= 19 students. The new program is not abundantly more effective than the old program. (1) There is a 5% chance that the mean reading speed of a random sample of 23 second grade students will exceed what value? There is a 5% chance that the mean reading speed of a random sample of 23 second grade students will exceed wpm (Round to two decimal places as needed.) Click to select your answer(s)
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